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matlab

 
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matlab
karthikasankar
27 Aug, 2008 - 02:25 AM
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Hi friends


I have to know the basics or algorithm for detecting vehicles from static images using color and edges.but i have started using color transform model.please guide to continue for the project
Thanks in Advance
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dineeshd
RE: Matlab
27 Aug, 2008 - 03:47 AM
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Please post your code so far and give detailed explanations about the scenario.
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karthikasankar
RE: Matlab
27 Aug, 2008 - 11:11 PM
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Dear sir


I have attached my block diagram. The code wat i wrote pasted below.


CODE
     image=imread(filename of image);
              figure;
              imshow(image);
  %  convert image from RGB color space to L*A*B color space
              cform=makeform('srgb2gray');
              Lab_image=applyform(image,cform);



after this i dont know how to proceed so please guide me to continue .


Thanks in advance








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numerical_jerome
RE: Matlab
13 Sep, 2008 - 07:39 PM
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It appears you have only brought in your image into a MATLAB array, and converted from RGB. Next step, if you are looking for discreet items, would be edge finding.

Wikipedia might be a good place to look there

http://en.wikipedia.org/wiki/Edge_detection

once you've read a few different methods (all of which work surprising poorly, edge detection is a very non-trivial task) and have created some code attempting edge detection, you may have a better feel for how to proceed with you particular problem.

-Jerome

P.S. Having done similar tasks in the past, I find using MATLAB's 3d mesh plot is a very good way of visualizing the brightness of individual pixels / groups of pixels, and refining how thresholds are set, et cetera, ymmv
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