| 摘要 |
Disclosed herein are method and apparatus for processing the gray level in which error diffusion noise can be minimized while enhancing the power of gray level representation. According to an embodiment of the present invention, the method includes the steps of performing a random error diffusion operation on the video data, and performing a dithering operation on the error-diffused video data. According to another embodiment of the present invention, the method includes the steps of performing a random error diffusion operation on the video data using a first random coefficient value, and performing a random dithering operation on the error-diffused video data using a second random coefficient value. According to still another embodiment of the present invention, the method includes the steps of performing a random error diffusion operation on video data of a corresponding pixel using error conversion coefficients and a random error diffusion coefficient each calculated from pixels adjacent to the corresponding pixel, and performing a dithering operation on the random error-diffused video data using a plurality of dither mask patterns which are divided on a per gray level basis and on a per frame basis. <IMAGE> |
