Patent ID: 7649652
Filing Date: 2010-01-19
Classification: G06T

Abstract:
1. A method of expanding bit resolution, the method comprising: receiving an input image; determining a first threshold value used to enhance bit resolution, a second threshold value used to detect a texture and a third threshold value used to detect a pattern, in consideration of global information of the input image; determining whether a texture exists in a mask region composed of surrounding pixels existing within a predetermined range around a current pixel, using the second threshold value; determining whether a regularly repeated pattern exists in the mask region, using the third threshold value if it is determined that no texture exists in the mask region; decreasing the first threshold value if it is determined that a texture or a pattern exists in the mask region; and adjusting values of pixels in the mask region depending on the first threshold value, and enhancing bit resolution of the current pixel value using a resultant value obtained by filtering the adjusted pixel values.