Patent ID: 7620240
Filing Date: 2009-11-17
Classification: H04N

Abstract:
1. A method of encoding and decoding image data by applying an image capturing device comprising: (a) generating a difference coding group according to green pixels and pixels of another color of a set of pixels; (b) applying a modified Hadamard transform (MHT) on the difference coding group to generate a corresponding low-frequency parameter and a plurality of corresponding high-frequency parameters; (c) adjusting the low-frequency parameter to fit a designated format; (d) adjusting the plurality of high-frequency parameters according to a quantification factor; (e) restoring the adjusted low-frequency parameter; (f) restoring the plurality of adjusted high-frequency parameters according to the quantification factor; and (g) applying an inverse modified Hadamard transform (IMHT) on the restored low-frequency parameter and the plurality of restored high-frequency parameters to restore the difference coding group.