1. A method for arbitrary ratio resizing of a compressed image in the discrete cosine transform (DCT) domain, comprising steps of: determining first and second scaling parameters in accordance with a scaling ratio and original and target image block numbers; performing a non-uniform sampling in the DCT domain, in accordance with the first and second scaling parameters, on DCT coefficients of successive blocks in the compressed image; and performing a DCT operation on the non-uniformly sampled samples to provide DCT coefficient blocks of a resized image.