Patent ID: 7620262
Filing Date: 2009-11-17
Classification: H04N

Abstract:
1. A computer-implemented method comprising: obtaining, from image data and by a coding system, blocks that each include multiple pixels, a first pixel of a first block being separated from a second pixel of a neighboring second block by a block boundary, with no pixels separating the first and second pixels; determining, by the coding system, whether to adjust the image data corresponding to the first and second pixels based on comparing pixel information to a threshold; selecting, when determining to adjust the first and second pixels, a first correction mode of the coding system or a second correction mode of the coding system; and modifying, by the coding system, the image data corresponding to the first and second pixels when the pixel information does not exceed the threshold and when the first correction mode is selected; and modifying, by the coding system, the image data corresponding to the first and second pixels, and a third pixel adjacent to the first pixel and separated from the second pixel by no pixels other than the first pixel, and a fourth pixel adjacent to the second pixel and separated from the first pixel by no pixels other than the second pixel, when the pixel information does not exceed the threshold and when the second correction mode is selected.