Patent ID: 8189952

Claim:
An image noise reduction method based on local correlation comprising: calculating a first pixel amount of pixels that are similar to each other in a first number neighbors of a central pixel in a motion window, wherein the pixels of the first pixel amount that are similar to each other need not to be similar to the central pixel, and the first number neighbors need not be equal to each other; calculating a second pixel amount of pixels that are similar to the center pixel in the first number neighbors of the central pixel; determining whether the first pixel amount of pixels that are similar to each other in the first number neighbors is greater than a first predetermined value; determining whether the second pixel amount of pixels that are similar to the center pixel in the first number neighbors of the central pixel is greater than a second predetermined value if the first pixel amount of pixels that are similar to each other in the first number neighbors is not greater than the first predetermined value; and filtering the center pixel of the motion window according to a result of determining whether the second pixel amount of pixels that are similar to the center pixel in the first number neighbors of the central pixel is greater than the second predetermined value.