Image enlarging device, an image enlargement program storage medium storing an image expansion program, and a display device

Image expansion apparatus, an image enlargement filter for generating a first enlarged image by enlarging the input image (1), the first wavelet transform portion for wavelet transform the first enlarged image and (2), said first the second wavelet transform portion for wavelet transform one of the enlarged image (3) and a first edge signal (EDGE_CDF9 / 7) which is generated on the basis of the output of the first wavelet transform portion and a second wavelet transform portion and a enhancement processing unit for the enhancement processing performed using the second edge signal generated (EDGE_Harr) based on the output (6, 7, 8, 10). And said first wavelet transform portion and the second wavelet transform portion uses a different wavelet transform each other.