cropping

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

Answer 1

[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?

Answer 2

[Alex Taylor]

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.