How do I select and produce a 8x8 pixel region of an original image as a new image?

I need to select an 8 pixel by 8 pixel region of the image from an interesting area of the image and perform 2D DCT on it.

Answer 1

[Keerthana Chiruvolu]

Hi,

You can use the imcrop() function to crop the region of interest an image, and perform 2-D DCT using dct2() function. Alternately, you may also select the region of interest by specifying the rows and columns parameters of the dct2() function.