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Matlab Image Processing

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Start date Apr 18, 2001

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Apr 18, 2001

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Plz help...I'm new to Matlab, and i have a few questions that I need to know in order to do my project, since i am unfamiliar with the available functions, etc.
I need to know how to Clear a section of an image.
I need to know how to Obtain the red component of an image.
And finally, I need to know how to superimpose a small selected section of image1 onto image2.

Thanks for all help!!