Method for adaptive image enhancement

Abstract

A filtering system and method are disclosed, to perform simultaneous, de-noising, and details enhancement tasks of a video image. The efficient filtering system includes multiple filters, which operate on a portion of the video image that has been partitioned into multiple rings. Using the filtering system, complex mathematical operations are avoided.

1 . A method for performing efficient filtering of an image, the method comprising:
 receiving the image, wherein the image is an n×n pixel neighborhood, n being an integer;   filtering a first portion of the image using a first ring filter, R 1 , resulting in a first output;   filtering a second portion of the image using a second ring filter, R 2 , resulting in a second output; and   filtering an third portion of the image using a third filter, R 3 , resulting in a third output.   
     
     
         2 . The method for performing efficient filtering of claim  14 , further comprising:
 filtering a fourth portion of the image using a fourth filter, R 4 , resulting in a fourth output; and   alpha-blending the first output, the second output, the third output, and the fourth output.   
     
     
         3 . The method for performing efficient filtering of claim  15 , alpha blending the first output, the second output, the third output, and the fourth output further comprising:
 executing the function, P out =PR 0 +α 1 PR 1 +α 2 PR 2 +α 3 PR 3 , where α 1 , α 2 , and α 3  are blending coefficients.   
     
     
         4 . The method for performing efficient filtering of claim  14 , further comprising:
 filtering a fourth portion of the image using a fourth filter, R 4 , resulting in a fourth output;   filtering a fifth portion of the image using a fifth filter, R 5 , resulting in a fifth output; and   alpha-blending the first output, the second output, the third output, the fourth output, and the fifth output.   
     
     
         5 . The method for performing efficient filtering of claim  17 , alpha blending the first output, the second output, the third output, the fourth output, and the fifth output further comprising:
 executing the function, P out =PR 0 +α 1 PR 1 +α 2 PR 2 +α 3 PR 3 +α 4 PR 4 , where α 1 , α 2 , α 3 , and α 4  are blending coefficients.   
     
     
         6 . The method for performing efficient filtering of claim  14 , further comprising:
 filtering a fourth portion of the image using a fourth filter, R 4 , resulting in a fourth output;   filtering a fifth portion of the image using a fifth filter, R 5 , resulting in a fifth output;   filtering a sixth portion of the image using a sixth filter, R 6 , resulting in a sixth output; and   alpha-blending the first output, the second output, the third output, the fourth output, the fifth output, and the sixth output.   
     
     
         7 . The method for performing efficient filtering of claim  19 , alpha blending the first output, the second output, the third output, the fourth output, the fifth output, and the sixth output further comprising:
 executing the function, P out =PR 0 +α 1 PR 1 +α 2 PR 2 +α 3 PR 3 +α 4 PR 4 +α 5 PR 5 , where α 1 , α 2 , α 3 , α 4 , and α 5  are blending coefficients.