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From: adaa 4girls on 3 Aug 2010 12:09
hi,
I am a computer science student. I'm learning matlab and I'm a beginner in matlab.
I want to extract the objects from the sample image. I have outlined the image with the pixel value of 50 and I want the object to be stored in an array as a original image. I need to extract the image without converting the image to binary or index. I want the exact rbg image extracted automatically. Please help me with the code. Thanks in advance.
From: Walter Roberson on 3 Aug 2010 12:19
adaa 4girls wrote:

> I am a computer science student. I'm learning matlab and I'm a
> beginner in matlab.
> I want to extract the objects from the sample image. I have outlined the
> image with the pixel value of 50 and I want the object to be stored in
> an array as a original image. I need to extract the image without
> converting the image to binary or index. I want the exact rbg image
> extracted automatically. Please help me with the code. Thanks in advance.

Suppose you have a 2D array of logical values, "Mask", with false
indicating a pixel you are not interested in, and true indicating a
pixel that you are interested in. Then

Mask3d = repmat(Mask,1,1,3);

would expand that 2D mask into the corresponding 3D mask that you would
use to index the original rgb array,

ColorImage(Mask3d)


Getting from the "outline" to a filled-in mask would be necessary before
you did this, but the method of doing that would depend upon how your
outline is represented.
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