cropping

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chitra s
chitra s 2011-6-24
sir, i am doing a project in face detection process. in that i draw an rectangular box in a face region. but i have to crop the rectangular part automatically. plz help me

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回答（2 个）

Arturo Moncada-Torres
Face detection is a big, big topic. Assuming you are extracting the information you wish (the rectangular part) of an image and that you know the coordinates, it would be something like this:
I = imread('imageExample.jpg');
rectangularPart = I(topRow:bottomRow, leftCol:rightCol);
Is this what you are looking for?
Alex Taylor
Alex Taylor 2011-6-24
Chitra,
If you have the Image Processing Toolbox, you can also use the function imcrop:
http://www.mathworks.com/help/toolbox/images/ref/imcrop.html
You'd want to use the syntax:
I2 = imcrop(I, rect);
Simple indexing like Arturo suggested is also a good way to go.

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