how to deal unsupporeted function in matlab??

... imshow inseershape imopen

[Geoff Hayes]

Yogesh - please provide some context/details on what you are attempting to do. What are you doing when the error (?) is being generated? If there is an error, then include the full error message in your question.

[yogesh nandurkar]

i am using code generation for motion detction programm.. when i used code generation ,there is error of unsupported function like "imopen"..sir how i solve this error.below is my programm

 vidDevice = imaq.VideoDevice('winvideo', 1, 'YUY2_640x480', ...
                             'ROI', [1 1 640 480], ...
                             'ReturnedColorSpace', 'rgb', ...
                             'DeviceProperties.Brightness', 90, ...
                             'DeviceProperties.Sharpness', 90);

 foregroundDetector = vision.ForegroundDetector('NumGaussians', 3, ...
    'NumTrainingFrames', 50);

for i = 1:150 frame = step(vidDevice); % read the next video frame foreground = step(foregroundDetector, frame);

end

se = strel('square', 3);

filteredForeground = imopen(foreground, se);

blobAnalysis = vision.BlobAnalysis('BoundingBoxOutputPort', true, ... 'AreaOutputPort', false, 'CentroidOutputPort', false, ... 'MinimumBlobArea', 150);

bbox = step(blobAnalysis, filteredForeground);

result = insertShape(frame, 'Rectangle', bbox, 'Color', 'green');

numCars = size(bbox, 1);

videoPlayer = vision.VideoPlayer('Name', 'Detected Cars');

videoPlayer.Position(3:4) = [650,400]; % window size: [width, height]

se = strel('square', 3); % morphological filter for noise removal

nFrames = 0;

while (nFrames<100)

    nframe = step(vidDevice); % read the next video frame

    % Detect the foreground in the current video frame
    foreground = step(foregroundDetector, nframe);

    % Use morphological opening to remove noise in the foreground
    filteredForeground = imopen(foreground, se);

    % Detect the connected components with the specified minimum area, and
    % compute their bounding boxes
    bbox = step(blobAnalysis, filteredForeground);

    % Draw bounding boxes around the detected cars
    result = insertShape(frame, 'Rectangle', bbox, 'Color', 'green');

    % Display the number of cars found in the video frame
    numCars = size(bbox, 1);

    step(videoPlayer, result);  % display the results
nFrames = nFrames + 1;
end

thanks sir....

Answer 1

[Adam]

I assume from your tag (which ideally should just be a list of simple tags!) you are trying to use Matlab Coder.

What would you expect Matlab Coder to do with something like imshow though?

It requires graphics handling which is not part of porting code into C++ as far as I am aware. Matlab Coder is generally used for converting algorithmic code to C or C++ in order to run faster.

Matlab Compiler would allow you to build a standalone executable of your Matlab program if that is what you are wanting to do.

[yogesh nandurkar]

below is my programm...i have problem with imopen function .. thanks sir..

vidDevice = imaq.VideoDevice('winvideo', 1, 'YUY2_640x480', ... 'ROI', [1 1 640 480], ... 'ReturnedColorSpace', 'rgb', ... 'DeviceProperties.Brightness', 90, ... 'DeviceProperties.Sharpness', 90);

foregroundDetector = vision.ForegroundDetector('NumGaussians', 3, ... 'NumTrainingFrames', 50);

for i = 1:150 frame = step(vidDevice); % read the next video frame foreground = step(foregroundDetector, frame);

end

se = strel('square', 3);

filteredForeground = imopen(foreground, se);

blobAnalysis = vision.BlobAnalysis('BoundingBoxOutputPort', true, ... 'AreaOutputPort', false, 'CentroidOutputPort', false, ... 'MinimumBlobArea', 150);

bbox = step(blobAnalysis, filteredForeground);

result = insertShape(frame, 'Rectangle', bbox, 'Color', 'green');

numCars = size(bbox, 1);

videoPlayer = vision.VideoPlayer('Name', 'Detected Cars');

videoPlayer.Position(3:4) = [650,400]; % window size: [width, height]

se = strel('square', 3); % morphological filter for noise removal

nFrames = 0; while (nFrames<100)

    nframe = step(vidDevice); % read the next video frame

    % Detect the foreground in the current video frame
    foreground = step(foregroundDetector, nframe);

    % Use morphological opening to remove noise in the foreground
    filteredForeground = imopen(foreground, se);

    % Detect the connected components with the specified minimum area, and
    % compute their bounding boxes
    bbox = step(blobAnalysis, filteredForeground);

    % Draw bounding boxes around the detected cars
    result = insertShape(frame, 'Rectangle', bbox, 'Color', 'green');

    % Display the number of cars found in the video frame
    numCars = size(bbox, 1);

    step(videoPlayer, result);  % display the results
nFrames = nFrames + 1;
end

[Adam]

imopen is listed on

http://uk.mathworks.com/help/simulink/ug/functions-supported-for-code-generation--alphabetical-list.html

as supported by Matlab Coder. I don't use the Coder yet myself although we are currently trialling it in our team so I don't really know what type of errors get thrown up or how to deal with them specifically yet.