IMAGE ENCODING APPARATUS, IMAGE ENCODING METHOD, PROGRAM, IMAGE DECODING APPARATUS, IMAGE DECODING METHOD, AND PROGRAM

摘要

An image coding apparatus includes a setting unit configured to set a coding control parameter, a first transform unit configured to transform a frequency of pixel data of a block having a first size, and execute transform by substituting transform coefficients with predetermined values except a part of the transform coefficients, a second transform unit configured to transform a frequency of pixel data of a block having a second size smaller than the first size, a block size determination unit configured to limit use of the first transform unit based on the coding control parameter, and a coding unit configured to control and code one of outputs of the first transform unit and the second transform unit based on a determined block size.