Mukhopadhyay, J. and Mitra, S.K. (2002), Resizing of DCT-Based
Compressed Images, proc. of the 4-th Int. Conf. on Digital Signal
Proc. and Applications (DSPA), Moscow, Russia, 386-389. 

Abstract. 

In various applications images are available in the compressed forms. Resizing of such digital images may be needed during transmission of images over communication channels varying widely in their bandwidths. One may require to perform this operation for displaying them at different spatial resolutions depending on the property of the display devices. In this work we propose an algorithm for resizing the digital images in its DCT-based compressed form. This is a modification of a recently proposed elegant image resizing algorithm by Dugad and Ahuja. We have also applied the techniques to color images and observed their performances at different levels of compressions for an image.  download full paper