Modified edge-directed interpolation for images

bstract. We present a modification of the new edge-directed inerpolation method that eliminates the prediction error accumulation roblem by adopting a modified training window structure, and exending the covariance matching into multiple directions to suppress he covariance mismatch problem. Simulation results show that the roposed method achieves remarkable subjective performance in reserving the edge smoothness and sharpness among other methds in the literaturé. It also demonstrates consistent objective perormance among a variety of images. © 2010 SPIE and S&T. DOI: 10.1117/1.3358372