Converting livestream RGB video to gray scale

Hello I am wondering if it is possible to convert a livestream RGB into grayscale while still remaining in live video

this is what i have so far to obtain live video however I am stuck on how to make gray scale

or how to put the live video on a plot

cam = webcam

preview(cam)

Answer 1

[Image Analyst]

After you call videoinput set ReturnedColorSpace to 'grayscale'.

vidobj = videoinput(theVideoAdaptor, cameraDeviceID, selectedCameraFormats{selectedFormatIndex});
vidobj.ReturnedColorSpace = 'grayscale';

[Jose]

Hello thank you for the answer I was wondering what that would look like im relatively new to matlab and am trying to learn how to do it

[Image Analyst]

Here is a snippet from the attached program:

% Get the device ID:
cameraDeviceID = cameraInfo.DeviceID;
% Now we know which device/camera they want to use and which format/mode they want to use.
% Now, initialize the camera with the selected mode on its list of supported formats.
vidobj = videoinput(theVideoAdaptor, cameraDeviceID, selectedCameraFormats{selectedFormatIndex});

% Convert to gray scale if that's what is selected.
radGray = get(handles.radGray, 'Value');
if radGray
    vidobj.ReturnedColorSpace = 'grayscale';
else
    vidobj.ReturnedColorSpace = 'rgb';
end
if ~isempty(vidobj)
    src = getselectedsource(vidobj);
    vidobj.FramesPerTrigger = 1;
    axes(handles.axesImage);
    hImage = findobj(handles.axesImage, 'Type', 'image');
    preview(vidobj, hImage);
    % 			src.ZoomMode = 'manual';
    % Turn on the live video preview.  Display the bounding box over it if there is one selected.
    TurnOnLiveVideo(handles);
end

[Jose]

Oh I see, do you think there is a way to do this but on the internal computer camera instead of a webcam. I dont have a build in adapter for the video input

[Image Analyst]

If you have a machine vision camera (USB or otherwise) and you're using the Image Acquisition Toolbox, you'll still have to use VideoInput. Then you can get src and apply the gray scale property if your camera adapter allows it. Otherwise you might have to get a gray scale camera or just grab individual snapshots and call rgb2gray() to convert them from color to gray scale.

[Jose]

hmm do you think it can work on my internal laptop camera?

[Image Analyst]

Maybe - with my Logitech demo you might have to debug it and figure out what the adapter name of your camera is and replace Logitech with your computer camera's name.