MATLAB: Display the output frame and automatically close the output frame in matlab

sequentially display frame one by one

I am working on a project named illegal trash throwing person detection. I just want to display the output frame one by one and then the frame will vanish and will display new frame output. Now which function will I use to do that operation.

Ex: In a input video 1st frame will be displayed then it will vanish then 2nd frame will be displaye and vanished and so on.

Best Answer

v = VideoReader('test.mp4');
while hasFrame(v)
  frame = readFrame(v);
  imshow(frame)
end

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MATLAB: I keep trying to convert a video grayscale but it gives me an error

Instead of rgb2gray(), use read() and pass it the frame number. Should look something like this:

% Loop through the movie, writing all frames out.
for frame = 1 : numberOfFrames
	% Extract the frame from the movie structure.
	thisInputFrame = read(inputVideoReaderObject, frame);
	
	% Display it
	image(thisInputFrame);
        if ndims(thisInputFrame) == 3
            thisInputFrame = rgb2gray(thisInputFrame);
        end
	axis on;
	axis image;
	caption = sprintf('Frame %4d of %d.', frame, numberOfFrames);
	title(caption, 'FontSize', fontSize);
	drawnow; % Force it to refresh the window.
	
	% Resize the image.
	outputFrame = imresize(thisInputFrame, [outputVideoRows, outputVideoColumns]);
	
	% Write this new, resized frame out to the new video file.
	writeVideo(outputVideoWriterObject, outputFrame);
	
	% Update user with the progress.  Display in the command window.
	progressIndication = sprintf('Processed frame %4d of %d.', frame, numberOfFrames);
	disp(progressIndication);
	% Increment frame count (should eventually = numberOfFrames
	% unless an error happens).
	numberOfFramesWritten = numberOfFramesWritten + 1;
end

MATLAB: Frame Difference

The default size of the colormap for gray() is smaller than 256 elements. You need to use

M(i-1)=im2frame(uint8(fg),gray(256));

Best Answer

Related Solutions

MATLAB: I keep trying to convert a video grayscale but it gives me an error

MATLAB: Frame Difference

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