×

Method for generating a block-based image histogram

  • US 6,807,298 B1
  • Filed: 01/28/2000
  • Issued: 10/19/2004
  • Est. Priority Date: 03/12/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for generating a block-based image histogram using color information and brightness information of an image data, comprising:

  • extracting edge information of an image in terms of a blocks having a plurality of pixels in the block; and

    updating edge histogram bins on the basis of the edge information to generate a global edge histogram;

    wherein extracting edge information further comprises;

    dividing the block into a plurality of sub-blocks by dividing the block by half with respect to a horizontal direction and dividing the block by half with respect to a vertical direction;

    obtaining brightness representative values of the sub-blocks, respectively; and

    determining if an edge exists in the block and determining an edge type by comparing a brightness difference between the adjacent sub-blocks with a threshold.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×