MATLAB: Video stream height measurement

video analysing

i m working on video analysing program where i have to measure the height of the incoming video stream object, Now i took the video stream into the matlab. I couldnt do the measurement part .Can u pls help me with this analysing part.

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the object will be in the same distance. The object height varies(withn the known region) and it has to be measured.

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MATLAB: Image Acquisition using a GUI

Thank you image Analyst for the fast replay but i think that i found the solution to my problem :)!

instead of using

capt1 = getdata(vid);

i used

capt1 = getdata(vid,1,'uint8');

because getdata(vid) will get the data as uint 16 by default and jpg works with uint8 so we have to specify that

MATLAB: Recently I use image acquistion toolbox, the image captured is very gloothe

You're trying to display an image in the YCbCr color space (that's what the I420 in your videoinput line means) with a function that is expecting RGB data.

If you do:

 vid = videoinput('winvideo', 1, 'I420_640x480');
 vid.ReturnedColorSpace = 'RGB';

then the toolbox will convert the data to RGB data when you call getsnapshot or getdata. If you actually want the YCbCr data you can omit changing the ReturnedColorSpace property and instead convert the data before displaying it:

 frame = getsnapshot(vid);
 imshow(ycbcr2rgb(frame));

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MATLAB: Image Acquisition using a GUI

MATLAB: Recently I use image acquistion toolbox, the image captured is very gloothe

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