The block processing function does the work of breaking the input image into blocks, calling the specified function for each block, and reassembling the results into an output image. An understanding of the following terms will help you to use this chapter. For more explanation of this table and others like it, see Words You Need to Know in the Preface. An operation in which an image is processed in blocks rather than all at once. The blocks have the same size across the image.
Some operation is applied to one block at a time.
The blocks are reassembled to form an output image. The additional rows and columns normally contain zeros. Center pixel The pixel at the center of a neighborhood. Column processing An operation in which neighborhoods are reshaped into columns before processing in order to speed up computation time. A block operation in which the blocks do not overlap.