ARITHMETIC UNIT, IMAGE DATA CONVERSION DEVICE, PORTABLE INFORMATION TERMINAL, AND ARITHMETIC PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an arithmetic unit which can be used while easily switching accurate operation and high-speed operation as needed, an image data conversion device, a portable information terminal and an arithmetic program.

SOLUTION: The arithmetic unit comprises a memory 3 retaining data of a look-up table of a size according to a designation operation accuracy showing a designated operation accuracy; an address acquisition part 5 for acquiring an address based on the designated operation accuracy and input data Din; and a reading part 6 for reading data of the look-up table corresponding to the address acquired by the address acquisition part 5 from the memory 3 and outputting it as output data Dout.

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