How to turn on the built-in WEB-camera on a Sony Vayo laptop
If you search the net for information on how to turn on the camera on a sony laptop, you will receive standard, stupid answers, such as: enter the control panel, go to devices and printers (scanners and cameras), find it and turn it on.
In fact, nothing will come of it. To turn on the built-in WEB-camera on a Sony Vayo laptop, you definitely need to fulfill two conditions, namely: install native drivers and a special program.
It is possible that you already have this set. If you bought your Sony Vaio laptop with a preinstalled Windows 7 or Windows 8 operating system, then most likely this kit for turning on the camera is already there.
In this article I will tell you how to connect a camera on a Sony Vaio laptop, when the operating system was installed on your own, and you are already looking at what is and what needs to be added along the way.
Drivers for a camera on a laptop Sony Vaio
If your Sony Vaio laptop has a built-in camera, you won’t be able to turn it on without the appropriate drivers. Where to get them?
From the Internet. You can search for them on the network on different sites, but I will describe the most reliable option and show it using the VGN-CR415E laptop as an example.
So, first we write in the search engine (I chose google) Sony support and follow the link shown in the picture below. This is the European version, it is in English.
In the Russian version. there is nowhere worse. it is better not even to enter it, although why not check it yourself.
By clicking on the link in the search, we register the name of your Sony Vaio laptop, as in the screenshot below and click “GO”
Next, a page will open where to download drivers for the WEB-camera (built-in) of your Sony Vayo laptop, you need to perform four clicks.
The first is to go to the category (at the very top) drivers software, the second is to select the operating system (usually Windows 7), expand the “CAMERA” menu (small red triangle) and press “DOWNLOAD”.
After that, you will be redirected to another page, where at the very bottom there will be a link to download the driver for your laptop (camera).
Download and install, just remember, as I wrote above, maybe you already have it (the driver) installed. To make sure, follow the second step first. install a special program.
The program for turning on the built-in WEB-camera on a laptop Sony vayo
Remember once and for all that having a built-in WEB-camera in a laptop, without having a special. programs to include it will not work. Although you can use the online service or skype.
There you will find (download) not only the application you need, but also detailed instructions on how to do everything.
This concludes. Now that you know the “basics”, and after reading the article any student will understand everything, one question “how” (turning on the camera) will disappear forever. Good luck.
Removing and re-detecting the webcam
If the usual update did not help you, do it a little differently: remove the camcorder, and then immediately put it back in place. Upon returning, the system will immediately install the device with all the latest updates. We will describe how to do this below:
- Launch the “Task Manager” using the “Windows Settings” window or the “Search” panel. Detailed instructions for launching are in the section on disabling the webcam.
- We click on our video device with the right mouse button, in the additional menu, select “Remove device”. Click on the “Remove device” item to make the “Cameras” section disappear from the list of “Task Manager”
- In the next window, we confirm that we want to get rid of the camera for a while. You will see that the “Cameras” section has disappeared from the list. Click “Delete” to confirm the action
- Click on the “Action” link on the top panel of the dispatcher and select the “Update hardware configuration” option. Select the menu item “Update hardware configuration”
- We are waiting for the system to find the devices again and update the list. After that, you can try to start the webcam again.
Launching the application from the start menu
Calling the Camera application is quite simple: it is in the list of utilities in the system Start menu. Follow the small instructions:
- Click on the window-shaped button in the lower left corner of the screen. This is the leftmost icon on the taskbar. This menu is also called by a special key on which the same icon is drawn. Finding it is easy: it is next to the space. Click on the “Start” button with an icon in the form of a window to launch the menu of the same name
- In the menu, you can simply scroll through the list of services and applications to the letter “K”. If you don’t want to scroll through the list, press the letter “A”. Click on the letter “A” to open the table with the rest of the available letters
- In the appeared table with letters from two alphabets, select the Russian “K” with the left mouse button. Select the Russian letter “K” in the table
- A small list will open with applications starting with this letter. Find “Camera” in it and left-click on it. Click on the “Camera” item in the list of applications on the letter “K”
- You should immediately see yourself on the PC display.
How to disable the webcam on a Windows 10 laptop
Sometimes users may need to turn off the webcam for one reason or another. This can be done in the Windows “Device Manager” system window. Follow the step by step instructions:
- Bring up the “Device Manager” window. The easiest way is to enter the corresponding query in the panel for universal search in the Windows system: it is launched through the magnifying glass icon on the “Taskbar”. Typically, this icon is located next to the Start button. In the search results then click on the desired section. In the bar “Search” enter the query “Device Manager”
- If you do not have this icon, use the Windows Settings window: press the Win I key combination and start typing “Device Manager” in the search bar. As you type, the system will automatically determine what exactly you want to open. Select the required service from the list by clicking the left mouse button. In the search bar in the “Options” window, enter the query “Device Manager”
- In the manager window find the line “Cameras” and open the list of connected devices by double-clicking.
- Right click on the name of your built-in camera. In the context menu, select the “Disconnect device” option. In the context menu, click on the line “Disable device”
- In the dialog box that appears, confirm your intention to temporarily deactivate the video device. Click “Yes” to turn off the camcorder
You can turn on the WEB-camera again through the same context menu that opens by right-clicking on the corresponding item.
What to do if the camera doesn’t work
Users of the Windows operating system sometimes fail to launch the classic Camera utility. At the same time, as a rule, a message appears in the window stating that it is not possible to find the camera or turn it on. Each error has its own code. Most problems are resolved by updating or rolling back video device drivers.
How to turn on the webcam on a Windows 10 laptop and what to do if it doesn’t work
All laptops are equipped with a built-in webcam. Users can use it as a tool for video chats in various messengers, for example, Skype. In Windows 10 there is a special standard application “Camera”, which allows you to quickly launch it on a laptop like on a phone to take an instant photo or video. Today we will consider how to enable and configure the camera in the application of the same name, as well as how to provide certain programs with access to it. In addition, we will list effective ways to troubleshoot the “webcam”.
Rollback to a previous version of the driver
If you notice that the “webcam” began to refuse to work after a recent driver update, roll back to the previous version. The following procedure can help you regain access to the camera:
- We call the “Device Manager” on the display again. In the context menu of the video device, which is in the “Cameras” section, click on the “Properties” option.
- We switch to the second block and in it we press the “Roll back” button. It should be noted that some drivers do not support rollback. In this case, the button has a dull hue and becomes unclickable. in this case it will not be possible to rollback. The “Rollback” button in the properties window may be inactive: rollback in this case will not work
- We confirm our action by clicking on the “Yes” button.
- After the procedure, we check if the camera is working.
Updating or Installing a Driver
The most common cause of camera problems is late driver updates. How to make an update, we will describe in the instructions:
- Launch “Device Manager” using any of the methods described in the section “How to disable the webcam on a laptop with Windows 10”.
- Find the “Cameras” object in the list and open it with a double click. Right-click on the line with the required equipment and select the “Update driver” option from the list. You can also launch the update by clicking on the “Properties” item. a new small window will appear, in the second tab of which you need to click on the “Update driver” button. Click on the “Update Driver” button in the “Properties” window
- In the next window, click on the link for automatic search. Click on the link “Automatic search for updated drivers”
- We are waiting for the process to complete. It will take a little time. We are waiting for the search for available drivers on the network to complete
- As a result, the system will either find, download and install an available update, or notify you that all the latest drivers are already installed on your device. The system may display a message stating that the current drivers are already installed
- You can also manually search for updates on your computer to make sure the driver does not definitely need an update. To do this, instead of automatically searching in the start window, select “Search for drivers on this computer”. Click on “Select a driver from the list of available PCs” again. Click on the link below “Select a driver from the list of available on the computer”
- If you have a disc or other drive with your camera drivers, click on the “Have Disk” link.
Click on the “Next” button to start the driver search or click on the “Have Disk” button if you have a disc with camera drivers
- Wait for the procedure to complete. As a result, a message will appear stating that the system has successfully installed the drivers. Now you can close all windows, restart your computer and try to start the camera again. Click on the “Close” button after the system has successfully completed the driver update
Troubleshooting code 0xA00F4246
After launching the “Camera” utility, a black window may open with a notification that the “webcam” cannot be launched. In this case, the system will ask you to check if new driver versions are available, and update the latest ones if available. The error code in this case is 0xA00F4246. It occurs both with built-in devices and with removable (external) devices that are connected separately.
Error 0xA00F4246 may occur when launching the Camera application
If you encounter this problem, most likely, your camera will not work in other utilities that need it, for example, in Skype. Unfortunately, you cannot fix the problem by simply updating the drivers. The way out of the situation is a small procedure for editing the registry in the Windows system application:
- Start Registry Editor. It’s quite simple to do this: press the Win and R keys and in the small window spell the word regedit. After that, immediately click on OK or Enter so that the system will execute the specified command. Enter the regedit command in the window that appears
- In a small Windows system window, confirm permission to the Registry Editor to make changes on the computer.
- A list of several branches will appear on the left pane of the window. Choose the third one. HKEY_LOCAL_MACHINE. Double-click it and open the SOFTWARE folder. Open the HKEY_LOCAL_MACHINE branch on the left, and in it the SOFTWARE folder
- Go to the Microsoft folder and then to Windows Media Foundation. Open the Windows Media Foundation section in the Microsoft folder
- In the last folder, right-click on the Platform block and in the small menu, point to the “Create” item. In the following list, select “DWORD Value”. Click on the “New” button and select “DWORD Parameter”
- Use EnableFrameServerMode as the name of the created parameter. Name the created entry EnableFrameServerMode
- Open it by double-clicking the left mouse button. In the window that appears, set the created parameter to 0. To save the changes, click OK. Put the value 0 in the corresponding box of the window
- Close the editor window, disable all open applications and restart the PC.
- When the device starts up, check if the problem with the Camera Utility is resolved.
How do I turn off the camera on my laptop? 3 easy ways
Today, hacking has begun to develop in the world of information technology. An experienced hacker can penetrate almost any computer and obtain user information, if, of course, the laptop is connected to the network.
Why turn off the camera
Recently, users have been complaining that their webcam turns on spontaneously. So hackers can see where you are and what you are doing. In the future, this information can be used in completely different ways, up to the fact that you become a star on YouTube.
How to solve this problem? It’s pretty simple, you can just turn off the camera until you are using it to chat with friends. How do I turn off the camera on my laptop? To do this, you can use 3 completely different ways. Let’s take a look at them.
How to turn off the camera on a laptop. The first way
The easiest way is to close the webcam lens. There are many different shutters on the Internet that will help you close your camera. In addition, laptops are now available that already include these additional protections. Of course, you will not change your computer because of some kind of curtain, but if you do not even want to buy an additional element that will cover the lens, then you can use the “collective farm” method. We take electrical tape, a piece of paper and glue the webcam.
As we have already found out, this is the easiest way, but there is still one more problem. This way we will not turn off the microphone. This is not a big problem, but if you want to completely protect yourself from intruders, you should use other methods.
How to turn off the camera on a laptop Windows 7, 8.1, 10? A more reliable way is to turn off your webcam through the device manager. Using it, you can both disconnect the selected device and connect it back. First, let’s take a look at how to disable the camera on a laptop.
- Go to the “Device Manager” directory. How to do it? In the search, you must write “Device Manager” and press Enter. In Windows 7 and Windows 8, search is found in the Start menu, and in the newest version of Windows, search can be found near the Start menu.
- Go to the Imaging Devices tab, where you can see your camera. It usually has the name of the computer manufacturer. If you need to turn off the external webcam, then you should go to the “USB Controllers” tab. Of course, it’s a little easier with an external camera. It can be simply disconnected from USB and, if necessary, reconnected.
- Right-click on your camera and select “Disable”. Next, you need to agree with all the warnings.
That’s all. The webcam is disabled. Now you need to consider how to turn on the camera.
Why Aren’t You Using A GoPro As Your Webcam??
- Open the “Device Manager” directory.
- We pass to the section “Image processing devices”.
- Select the webcam and right-click on it. In this case, you must select the “Enable” item and click on the “Yes” button, confirming your action.
As you may have noticed, this is a fairly simple way to turn off the camera, but there is another software method for turning off.
How do I turn off the camera on my laptop? To do this, we need to install the additional WebCam On-Off program. This is a fairly simple program that does not even require installation, it works right from the folder.
So, after installing the program, open it. To do this, go to the directory of the desired utility and click on the shortcut with the extension (exe). Unfortunately, the application is in English, but it’s not hard to guess how to work in it. On the left you can see 3 buttons.
To turn off the webcam and microphone, you must click on the Disable button. And to enable, you need to click on the Enable button. It should be remembered that when the camera is turned off, it should not be used in any applications.
How do I turn off the webcam on my laptop? As you can see, this is quite easy to do. You can choose the method that suits you best and turn off the camera when not in use.
The most common scenario for a situation is in Skype, although other options are also possible. The most common reason that the video from the camera is upside down is the driver (or, rather, the wrong drivers that are needed).
In cases where the upside-down image is caused by drivers, this occurs when:
- The drivers were installed automatically when Windows was installed. (Or the so-called assembly “where all the drivers are”).
- The drivers were installed using a driver pack (for example, Driver Pack Solution).
To find out which driver is installed for your webcam, open Device Manager (type Device Manager in the search box in the Windows 7 Start Menu or Windows 8 Start Screen), then find your webcam. which is usually found under “Imaging Devices”, right-click on the camera and select “Properties”.
In order to install the correct drivers, go to the official website of the manufacturer of the device or your laptop, where all the necessary drivers can be downloaded completely free of charge. For more information on where to find drivers specifically for your laptop, you can about Honor in the article: How to install drivers on a laptop (opens in a new tab).
Inverted webcam image. how to fix?
A common and common problem for many users is an inverted image of a laptop webcam (and a regular USB webcam) in Skype and other programs after reinstalling Windows or updating any drivers. Let’s see how to fix this problem.
In this case, three solutions will be offered: by installing the official drivers, by changing the settings of the webcam, and also, if nothing else helps, using a third-party program (So if you have tried everything, you can go straight to the third method).
Sometimes it may happen that even though the drivers for the webcam in Windows are installed specifically for use with this camera, the image in Skype and in other programs using its image still remains inverted. In this case, the possibilities to return the image to its normal form can be found in the settings of the device itself.
The easiest and fastest way for a novice user to get into the Webcam settings is to start Skype, select “Tools”. “Settings”. “Video Settings” in the menu, then, under your upside-down image, click “Webcam Settings”. a dialog box will open which will look different for different camera models.
For example, I don’t have the ability to rotate an image. However, for most cameras, there is such an opportunity. In the English version, this property can be called Flip Vertical or Rotate. in the latter case, you need to set the rotation to 180 degrees.
As I said, this is an easy and quick way to get into the settings, since almost everyone has Skype, and the camera may not be displayed in the control panel or devices. Another simple option is to use the program to control your camera, which, most likely, was installed simultaneously with the drivers when you completed the first step of this manual: there may also be the necessary options for rotating the image.
Camera control program from laptop manufacturer
How to fix an inverted webcam image using third-party software
If none of the above helped, it is still possible to flip the video from the camera so that it displays normally. One of the best and almost guaranteed to work is the ManyCam program, which you can download for free here (opens in a new window).
Installing the program is not particularly difficult, I only recommend that you refuse to install Ask Toolbar and Driver Updater, which the program will try to install at the same time. you do not need this garbage (you need to click Cancel and Decline where they are offered to you). The program supports Russian.
After launching ManyCam, do the following:
- Open the Video. Sources tab and click the “Flip Vertical” button (see the picture)
- Close the program (i.e. press the cross, it will not close, but will be minimized to the notification area icon).
- Open Skype. Tools. Options. Video Settings. And in the field “Select a webcam” select “ManyCam Virtual WebCam”.
Done. now the skype image will be normal. The only drawback of the free version of the program is its logo at the bottom of the screen. However, the image will be displayed in the state you want.
If I helped you, please share this article using the social media buttons at the bottom of the page. Good luck!
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I appreciate it! turned it over by downloading the program
Had to download ManyCam. But the problem was solved immediately. over, I got the opportunity to use image effects. True, I have not tried it yet.
Thank you! It helped as soon as I downloaded the ManyCam program.
The program downloaded the image turned upside down only in skype the image flickers when called. What could be?
I think you should try downloading webcam drivers from your laptop manufacturer’s website. If it is not there for your version of Windows, look under the previous one. And when you install it, turn off this program on the contrary.
the camera on the phone shoots upside down what can be done with it?
But I haven’t even met such a thing. Somehow there are no ideas. And as if she is shooting like that, or is it some third-party player just showing?
Hurrah! This is the only Mani Kam clue that helped! THANK!
I have a problem, recently on Skype, my image becomes vertical during a conversation. I have a tablet on win 10, your methods unfortunately did not fit, what else can I try? Thank. (if you can reply to mail)
I do not know what else to advise. Perhaps it has something to do with the orientation sensor on the tablet, but I’m not sure.
My problem was solved easily. For some reason, the image flip checkbox was checked in the camera settings.
You are absolutely right. After installing Win 10 on the ASUS K52JR laptop, in the properties of the “inverted” camera, it shows that the driver is from Microsoft. The native driver Azurewave Camera Driver 5.8.55133.208 is not installed when you try to install it, the installation starts and immediately “collapses”. At the same time, on Win 7, the same driver was installed normally. Installation in compatibility mode with Win 7 does not help either. The output is as follows: Driver. Update. search for drivers on this computer. specify the directory with the driver files. Everything is installed normally and the camera “returns from head to feet”!
THANK! this method helped! Done without third-party software.
Thanks, with the help of the ManyCam program I immediately solved the problem. Everything turned out to be easy and simple.
good day! Thanks to the ManyCam program, everything is cool! Only the camera began to lag a little!
Thank you very much, I am very grateful to you! ManyCam helped. The instruction is written in a very simple and understandable way.!
Thank you very much! Everything is sensible and useful. Good luck!
The picture turned over and everything became as it should, but the SOUND MISSED.
Strange. in general, the actions should not have affected the sound. The recording device has not been changed in the settings?
Thank you for your help. could not fix the inverted image on the camera in skype. following your advice, everything worked out. very grateful to you
Thank you very much, everything worked fine with the installation of Many Cam.
Thank you very helpful and working article. Everything is set up and now works correctly
Good day! Installed the program. During installation, I received a message about an unsigned driver (OS Win 7) and that the system did not allow installing the driver and the virtual camera may not work correctly. Launched the program. In the program itself, the image is reversed. ManyCam did not appear on Skype. Those. there is no connection with the program. How to deal with this problem? thank!
1. Remove ManyCam.
2. Disable the verification of the digital signature of the drivers (although, in fact, in theory, in 7-ke it offers to install even unsigned drivers, you had to agree). About shutdown here: https://remontka.pro/driver-digital-signature-check/
3. Install manyCam.
When I make a video call from Microsoft, my webcam shows correctly and at the bottom in the right corner it is turned upside down and with whom I am talking they see me in an upside down PC. was Windows 7 then became 10 the name “ASUS”
And on the official Asus website for your laptop model, there are no accidental webcam drivers?
Have you installed it? Is it the original one? It’s usually just enough for the image to be problem-free. No additional software for the webcam was installed along with the driver?
And how to invert an analog signal, that is, to mirror it, there are no drivers or programs.
Thank. I have already rearranged the drivers 30 times, no sense. I went to the camera settings via skype and fixed everything.
Nice program (ManyCam). There are a lot of opportunities there. We managed to mirror it and rotate it 90 degrees (to match the image with the phone format). Both picture-in-picture and video recording. great.
Only the user interface of the program is now so radically redesigned that I did not immediately find everything I needed, I almost abandoned it.
It would be nice to update the picture in the instructions.
It is possible that there may be several webcams in one PC / laptop. Per
an example does not have to go far. At work, I often have to organize
simple video conferencing. Usually two people are involved. Each of
participants are filmed by a separate camera. The cameras themselves are connected to my PC. When
I start shooting, then I select in the program for working with video cameras the one I need
present camera. Since we decided to take control of the camera, we must
figure out how to get a list of installed video capture devices and select
the one with which we will work at the moment.
To solve this simple task, the WindowsAPI provides the function
capGetDriverDescription. It takes five parameters:
- wDriverIndex. video capture driver index. The index value can
vary from 0 to 9;
- lpszName is a pointer to a buffer containing the corresponding driver name;
- cbName. size (in bytes) of the lpszName buffer;
- lpszVer. a pointer to a buffer containing a description of a specific
- cbVer. the size of the buffer (in bytes) that stores the driver description.
If successful, the function will return TRUE. Function description with us
is, now let’s see how to define it in C #. This is done like this:
protected static extern bool capGetDriverDescriptionA (short wDriverIndex, [MarshalAs (UnmanagedType.VBByRefStr)]
ref String lpszName, int cbName, [MarshalAs (UnmanagedType.VBByRefStr)] ref
String lpszVer, int cbVer);
Please note that before specifying the name of the function to be connected, in
it is mandatory to write the name of the DLL in which it is defined. IN
in our case it is avicap32.dll.
So, the function is imported, now you can write a class in which it will be
be used. I do not give the entire class code for obtaining a list of devices.
I will, I will show only the code of the key method:
public static Device  GetAllCapturesDevices String dName = “”.PadRight (100);
String dVersion = “”.PadRight (100);
The code looks nowhere simpler. The most interesting place in it is the cycle in which
the above function capGetDriverDescription is called. From MSDN we
know that the index (the first parameter of the capGetDriverDescription function) can
range from 0 to 9, so we purposefully start a loop in this
range. The result of executing the method will be an array of Device classes (this class
I determined it myself, see the corresponding source).
We figured out how to get the list of devices, now we will take care of the display
video stream from the camera. This function will serve us well.
capCreateCaptureWindow, designed to create a capture window.
Running a little ahead, I will say that further actions with the camera will be
happen by banal sending messages to the capture window. Yes exactly,
you will have to use the painfully familiar Windows programmer (and the funniest one)
the SendMessage function.
Now let’s take a closer look at the capCreateCaptureWindow function. To her
six arguments are required:
- lpszWindowName. null-terminal string containing the name of the capture window;
- dwStyle. window style;
- x. X coordinate;
- y. Y coordinate;
- nWidth. window width;
- nHeight. window height;
- hWnd. handle of the parent window;
- nID. window identifier.
The result of the function execution will be the handle of the created window or NULL in the case
errors. Since this function is also related to WinAPI, it is again needed
import. I will not give the import code, since it is practically
identical to what I wrote for the capGetDriverDescription function. Better right away
Let’s take a look at the camera initialization process:
deviceHandle = capCreateCaptureWindowA (ref deviceIndex, WS_VISIBLE |
WS_CHILD, 0, 0, windowWidth, windowHeight, handle, 0);
if (SendMessage (deviceHandle, WM_CAP_DRIVER_CONNECT, this.index, 0) 0) SendMessage (deviceHandle, WM_CAP_SET_SCALE.1, 0);
SendMessage (deviceHandle, WM_CAP_SET_PREVIEWRATE, 0x42, 0);
SendMessage (deviceHandle, WM_CAP_SET_PREVIEW.1, 0);
SetWindowPos (deviceHandle, 1, 0, 0, windowWidth, windowHeight, 6);
In this code, immediately after the window is created, an attempt is made to send a message
WM_CAP_DRIVER_CONNECT. The nonzero result of executing the function will tell
us about its success.
Now let’s imagine that today the gods are on our side and we will produce
sending multiple messages immediately: WM_CAP_SET_SCALE,
WM_CAP_SET_PREVIEWRATE, WM_CAP_SET_PREVIEW. Alas, as with functions, C #
knows nothing about the existence of these constants. You will have to define them again
yourself. I have provided a list of all the necessary constants with comments below.
// Custom message
private const int WM_CAP = 0x400;
// Connect to the video capture device driver
private const int WM_CAP_DRIVER_CONNECT = 0x40a;
// Break the connection with the video capture driver
private const int WM_CAP_DRIVER_DISCONNECT = 0x40b;
// Copy the frame to the clipboard
private const int WM_CAP_EDIT_COPY = 0x41e;
// Enable / disable preview mode
private const int WM_CAP_SET_PREVIEW = 0x432;
// Enable / disable overlay mode
private const int WM_CAP_SET_OVERLAY = 0x433;
// speed previewrate
private const int WM_CAP_SET_PREVIEWRATE = 0x434;
// Enable / disable scaling
private const int WM_CAP_SET_SCALE = 0x435;
private const int WS_CHILD = 0x40000000;
private const int WS_VISIBLE = 0x10000000;
// Set up a callback function for preview
private const int WM_CAP_SET_CALLBACK_FRAME = 0x405;
// Get a single frame from the video capture driver
private const int WM_CAP_GRAB_FRAME = 0x43c;
// Save the frame from the camera to a file
private const int WM_CAP_SAVEDIB = 0x419;
I will omit the further description of the class for working with a webcam. Frame i
considered, and with everything else you can easily figure it out by lighting my
well-commented source. The only thing that I would not like to leave
behind the scenes is an example of using the library.
In total, I have implemented (more precisely, added) a couple of methods in the library: GetAllDevices
(already considered), GetDevice (getting a video capture device driver by
index), ShowWindow (display the image from the webcam), GetFrame (capture
a separate frame to a graphic file) and GetCapture (capture a video stream).
As a demonstration of the functionality of the manufactured lib, I sketched
small application. I placed one ComboBox component on the form
(used to store a list of available video capture devices) and several
buttons. “Refresh”, “Start”, “Stop” and “Screenshot”. Oh yeah, still on my form
the component Image is dazzled. I use it to display video from the camera.
Let’s start our debriefing with the “Refresh” button. By pressing it, I get a list
all installed video capture devices. The stuffing of this event handler:
Device  devices = DeviceManager.GetAllDevices;
foreach (Device d in devices) cmbDevices.Items.Add (d);
Isn’t it that simple? The library we have developed takes over all the black
work and we just have to enjoy object-oriented
programming. The code for enabling the display of the video stream looks even simpler.
from the camera:
Device selectedDevice = DeviceManager.GetDevice (cmbDevices.SelectedIndex);
Again, everything is simpler than a steamed turnip. Well, now let’s take a look at the code of the “Screenshot” button:
Device selectedDevice = DeviceManager.GetDevice (cmbDevices.SelectedIndex);
I didn’t pay much attention to the FrameGrabber method. In my source
calling the method saves the current frame directly to the root of the system
disk. Of course, this is not very correct, so before combat use
programs do not forget to make all the necessary amendments.
Peeping through the webcam: learning to use the built-in webcam for our own purposes
The webcam can be easily adapted to recognize faces and create
an advanced way to log it into the system? If after digesting all this stuff, you
if you think it is difficult, then you are wrong! At the end of March on the site
for OpenSource projects from MS) an example appeared (and then a link to the article),
demonstrating the implementation of a program for face recognition using
webcams. The example itself is based on using the new features of.NET and
SilverLight. It is unrealistic to analyze this example within the framework of a journal article, since
the author of the source tried and did everything as smartly as possible. Here you and
algorithms for working with images (blur filter, noise reduction,
pixel-by-pixel comparison, stretching, etc.) and demonstration of new SilverLight products and
much more. In short, must use! Look for the link to the project and the article below.
Some people fear that the built-in webcam in their laptops may cause
to spy on them. They fear this so seriously that sometimes even
tape her watchful eye with tape. They do it for a reason. We will tell,
how can you programmatically master the webcam built into a laptop and use it
functional for both peaceful and not very purposes.
We begin implementation: the first annoying disappointments
I was very surprised and upset when I found out that in the great and mighty.NET
Framework completely lacks the ability to easily interact with webcams.
In the fourth version, the situation has improved (for SilverLight projects,
the corresponding classes), but I did not have time to test them, since the example for
I started writing this article even before the official release of VS2010 and the 4th.NET’a.
Almost desperate, I sat down tightly on Google. Runet search results
I was not inspired. all I found were links to MSDN and technology
DirectDraw. I even tried to sketch out a simple example, but because of
lack of experience with DirectDraw comprehended me a bummer. I managed
build a very simple application, but I still could not catch everything in it
It is a pity that the author’s project (I mean the library) was castrated as much as possible. All,
what the library allowed to do was to display the image from the webcam. No capture
separate frames, video recording and other useful features were not available.
And yet, my subconscious mind decisively told me that this project and
there is what I was looking for. Before I had a quick glance at his code, as
saw the names of familiar win messages and equally familiar names of WinAPI functions.
Once upon a time I had to write an application to work with a webcam
in Delphi. Then I encountered these functions for the first time.
After looking at the sources, I decided to write my own version of the library and provide it with the necessary
Readiness number 3
Now it’s time to talk about how to build a simple but reliable
video surveillance system. Usually such systems are based on two algorithms:
the difference between the two frames and simple background modeling. Their implementation (code)
is quite voluminous, so at the very last moment I decided to go for more
easy way. The easy route means using a powerful, but so far
a little-known framework for.NET. AForge.NET.
AForge.NET is primarily for developers and researchers.
With its help, developers can significantly facilitate their work when developing
projects for the following areas: neural networks, working with images (overlay
filters, image editing, pixel-by-pixel filtering, change
size, image rotation), genetics, robotics, video interaction
devices, etc. Good documentation comes with the framework. In it
absolutely all features of the product are described. Don’t be too lazy with her
familiarize. I especially want to note the quality of the code of this product. All
written in a civilized manner and delving into the code is a pleasure.
Now let’s get back to our immediate task. Frankly, by means
framework, it is solved as two and two. “Then why did you hover my brain with WinAPI
functions? “- you ask displeasedly. And so that you are not in anything
limited. You yourself know that there are different projects. It is more convenient to apply somewhere
NET, but somewhere it’s easier to get by with the good old WinAPI.
Let’s get back to our problem. To implement a motion detector, we will have to
use the MotionDetector class from the above framework. Class
perfectly operates with objects such as Bitmap and allows you to quickly calculate the percentage
discrepancies between the two images. In code form, this will look something like
MotionDetector detector = new MotionDetector (
new MotionAreaHighlighting );
// Process the next frame
if (detector! = null) float motionLevel = detector.ProcessFrame (image);
if (motionLevel motionAlarmLevel) flash = (int) (2 (1000 / alarmTimer.Interval));
if (detector.MotionProcessingALGorithm is BlobCountingObjectsProcessing) BlobCountingObjectsProcessing countingDetector = (BlobCountingObjectsProcessing)
objectsCountLabel.Text = “Objects:” countingDetector.ObjectsCount.ToString (
); else objectsCountLabel.Text = “”;
The above code (not counting the initialization of the MotionDetector class) I have
is executed when the next frame is received from the webcam. Having received the frame, I
I perform a banal comparison (the ProcessFrame method): if the value of a variable
motionlevel is greater than motionLevelAlarm (0.015f), which means you need to sound the alarm!
Motion detected. One of the screenshots clearly shows the work demonstration
The end of the film
The examples in this article will give you a good starting point. On their
based on it is easy to bungle as a professional utility for working with a webcam, and
raise a few hundred bucks a quarter on its sale or write a sly and
evil spy trojan.
How to use your GOPRO as a WEBCAM (Hero Black 7) // Everything you need to know!
Remember the article about backup
Skype conversations. In it I said that the days of keyloggers are over.
Audio and video data are especially relevant now. If u have a honor that today
a webcam is a must-have attribute of any laptop, it’s not hard to imagine,
how many interesting videos can you shoot by slipping a “useful
program “. However, I didn’t tell you that :). Good luck with your programming, and
if you have questions. write.
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