MATLAB: Need source code for display frames of the results from video pieces in one axes only.. how can be looping

image processingImage Processing ToolboxMATLABprogramming

need source code for display frames of the results from video pieces in one axes only.. how can be looping??

Best Answer

If you use image() or imagesc() to display the images, then you can pass them the X and Y coordinates of the center of the lower left and upper right pixels. To display another image in the same axes, you would specify a different (X,Y) coordinate pair for the second image.

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MATLAB: How to make array in matlab ( how to inisialisasi array )

Preallocation of an array is usually done with the zeros function:

B = zeros(n)
B = zeros(m,n)
B = zeros([m n])
B = zeros(m,n,p,...) 
B = zeros([m n p ...])

where m,n,p,... express the size for the 1st,2nd,3rd,...nth dimension.

If you're not looking for preallocation then your answer is too generic.

Something else I can think of is a generation of a random matrix, see rand and related functions.

All of the basic are well covered, wiht many examples in the getting started guide

EDIT

obj=VideoReader(video);
% (start)
%akhir deklarasi gambar yang ada di axes
numFrames = obj.NumberOfFrames;
waktu     = obj.Duration;
iterasi   = numFrames/waktu;
vidHeight = obj.Height;
vidWidth  = obj.Width;
disp(numFrames);
a = length(numFrames);
frames = zeros(vidHeight,vidWidth,iterasi);
c = 0;
if(~isempty(get(handles.nmvideo,'String')))
    try
        for n = 1:iterasi:numFrames
            c = c+1;
            frames(:,:,c) = read(obj,n);
            h = axes(handles.axes1);
            imshow(frames(:,:,c));
        end
    catch
        msgbox('Codec AVI tidak didukung atau Corupted file AVI','Error','error');
        return
    end
else
    msgbox('Anda harus memilih video terlebih dahulu','Error','error');
end

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

Best Answer

Related Solutions

MATLAB: How to make array in matlab ( how to inisialisasi array )

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

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