digital image enhancement

digital image enhancement

  • CN 101,578,855 B
  • Filed: 08/28/2008
  • Issued: 07/29/2015
  • Est. Priority Date: 08/28/2008
  • Status: Active Grant
First Claim
Patent Images

1. a digital image enhancement method, comprising:

  • The brightness of adjustment input picture and obtain the image of a brightness adjustment, comprise;

    estimate the real world brightness of input picture, adjustment image is to the brightness estimated and compression adjusts the dynamic range of image, the real world brightness of estimation is input picture I, be used for the function of scale factor (scaling factor) S and minimum brightness parameter τ

    carrying out adjusting between dynamic range of images and real world dynamic range;

    A low pass filter is used to extract background information from the image of brightness adjustment,Background information is deleted to extract contrast information from the image of brightness adjustment,Adjustment contrast information, andMerge the contrast information after background information and adjustment and obtain output image.

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