How can I put an image acquisition and processing algorithm on a continuous loop?

Hello,

We have created an algorithm that uses the CVST, the Image Acquisition Toolbox and a Point Grey GigE camera. The algorithm first acquires the images and then we run the images through a motion vector algorithm.

We would like to do these processes on a loop until we command a stop. We have the code set up so that it acquires the video input, saves the video, and then runs the video through an optical flow algorithm within this loop. However, we are often getting an error that states "block/frame XXX is being dropped because a lost packet is unable to be resent." We looked at the troubleshooting page and are still struggling.

What are some possible issues that we may be facing other than what the "Configuring GigE Devices" page suggests. Any help is appreciated. My program is shown below for reference.

Best Regards,

Twain Glaser

%%Video Acquisition Setup

vid = videoinput('gige', 1, 'Mono8');

src = getselectedsource(vid);

vid.TriggerRepeat = 4;

vid.FramesPerTrigger = 20;

imaqmem(1000000000);

j = 1;

while j < 15

%%Acquire Video

start(vid);

diskLogger = VideoWriter('D:\USERS\tglaser\Documents\MATLAB\Video.avi', 'Motion JPEG AVI');

open(diskLogger);

data = getdata(vid, vid.FramesAvailable);

numFrames = size(data, 4);

for ii = 1:numFrames

    writeVideo(diskLogger, data(:,:,:,ii));

end

close(diskLogger);

stop(vid);

%%Optical Flow videoReader = vision.VideoFileReader('D:\USERS\tglaser\Documents\MATLAB\Video.avi','ImageColorSpace','Intensity','VideoOutputDataType','uint8');

converter = vision.ImageDataTypeConverter;

opticalFlow = vision.OpticalFlow('ReferenceFrameDelay', 1);

opticalFlow.OutputValue = 'Horizontal and vertical components in complex form';

shapeInserter = vision.ShapeInserter('Shape','Lines','BorderColor','Custom', 'CustomBorderColor', 255);

videoPlayer = vision.VideoPlayer('Name','Motion Vector');

while ~isDone(videoReader)

    frame = step(videoReader);

    im = step(converter, frame);

    of = step(opticalFlow, im);

    lines = videooptflowlines(of, 20);

    if ~isempty(lines)

      out =  step(shapeInserter, im, lines); 

      step(videoPlayer, out);

    end

end

release(videoPlayer);

release(videoReader);

j = j + 1;

end