Disclosed is an image processing apparatus including: an edge
classification section for distinguishing an edge pattern of an edge to
be included in an expanded image of a compressed image and classifying
the edge by using the distinguished edge pattern, wherein the edge
classification section distinguishes the edge pattern by using
identification data assigned to each of the pixels of the compressed
image, the identification data indicating a half tone region or a high
resolution region with respect to each of the pixels, and quantized data
of each of the pixels.