×

Image processing method and apparatus for suppressing positional shift image degradation

  • US 7,689,065 B2
  • Filed: 11/18/2004
  • Issued: 03/30/2010
  • Est. Priority Date: 11/21/2003
  • Status: Expired due to Fees
First Claim
Patent Images

1. An image processing method comprising:

  • using an image processing apparatus to perform the following steps;

    a first acquisition step of acquiring, by using an image input unit, first image data of an inputted image at a first resolution;

    a storage step of extracting first low-frequency components of luminance values from the first image data, and storing the extracted first low-frequency components in a memory;

    a second acquisition step of acquiring second image data of each of divided areas into which the inputted image is divided, said second image data being acquired at a second resolution higher than the first resolution;

    a low-frequency extraction step of extracting a second low-frequency components of luminance values from the second image data;

    an image processing step of performing image processing for the second image data, using both the extracted second low-frequency components and low-frequency components of an area corresponding to the divided area in the inputted image among the first low-frequency components stored in the memory,wherein the second acquisition step, the low-frequency extraction step, and the image processing step are performed in sequence for each of the divided areas.

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