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METHOD FOR COMPRESSING IMAGE DATA AND IMAGE DATA COMPRESSING SYSTEM

  • US 20170353728A1
  • Filed: 04/12/2017
  • Published: 12/07/2017
  • Est. Priority Date: 06/04/2016
  • Status: Active Grant
First Claim
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1. A method for compressing image data, comprising:

  • setting a target data increment of each of N blocks that need to be compressed of an image to be compressed according to a 0th accumulated target data size and an Nth accumulated target data size;

    before compressing an nth block among the N blocks, calculating an (n−

    1)th accumulated compressed data size of an (n−

    1)th block among the N blocks;

    calculating an (n−

    1)th accumulated target data size of the (n−

    1)th block according to the 0th accumulated target data size and the target data increment;

    removing X least significant bit(s) of a plurality of sets of data in the nth block when a difference between the (n−

    1)th accumulated compressed data size and the (n−

    1)th accumulated target data size is smaller than a first predetermined threshold to generate a updated nth block; and

    compressing the updated nth block to generate a compressed nth block;

    wherein, N and X are finite positive integers, and n is a finite positive integer not greater than N.

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