1. A method of downsizing an input disjoint block level encoded image, comprising: Calculating, by a Discrete Cosine Transform (DCT) domain processor, a DCT downsize ratio for downsizing the input image in a DCT domain according to a target downsize ratio and according to a size of a DCT transform length associated with the input image; Adapting, by the DCT domain processor, an I-DCT according to the DCT domain downsize ratios, including configuring a DCT anti-aliasing filter (“AAF”) according to the target downsize ratio, and applying the DCT AAF to DCT coefficients corresponding to the input image; performing, by the DCT domain processor, the adapted I-DCT; providing, by the DCT domain processor, an intermediate image as output of a DCT domain process; and applying, by a pixel domain processor, a pixel domain interpolation to the intermediate image according to dimensions of the intermediate image and according to dimensions of the target image.