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matlab

karthikasankar	27 Aug, 2008 - 02:25 AM Post #1
New D.I.C Head Joined: 18 Jul, 2008 Posts: 18	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	27 Aug, 2008 - 03:47 AM Post #2
D.I.C Addict Joined: 30 Jun, 2008 Posts: 557 Thanked 16 times Dream Kudos: 575 My Contributions	Please post your code so far and give detailed explanations about the scenario.
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karthikasankar	27 Aug, 2008 - 11:11 PM Post #3
New D.I.C Head Joined: 18 Jul, 2008 Posts: 18	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 LAB 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 Attached File(s) untitled.bmp ( 1.77mb ) Number of downloads: 12
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numerical_jerome	13 Sep, 2008 - 07:39 PM Post #4
New D.I.C Head Joined: 16 Sep, 2007 Posts: 16 My Contributions	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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