IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND IMAGE PROCESSING PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an image processing apparatus, image processing method and image processing program in which image data are compressed less than or equal to fixed capacitance while reducing the effect of image quality deterioration and data transfer or recording can be performed.

SOLUTION: A compression data generating means 12 of a compression data processing unit 10 performs conversion processing on differential data, calculates a differential value and uses the differential value and group discrimination data to perform assignment processing of a Huffman code in accordance with generation frequency of data in each group. In a case where an average code length of 1 line does not become shorter than or equal to a target value because of the Huffman code, the compression data generating means 12 iteratively performs budgeting and quantization and specifies an SX value with which the average code length becomes shorter than or equal to the target value. The compression data generating means 12 converts values of pixels using the SX value at the time when the average code length becomes shorter than or equal to the target value, the Huffman code and positive and negative codes imparted to the groups.

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