| 摘要 |
PROBLEM TO BE SOLVED: To provide an image processing apparatus for reducing impulsive noise and small-signal noise, thereby preparing an image excellent in visibility. SOLUTION: A correlation index calculation unit 110 calculates an absolute differential value between a value of a peripheral pixel and a value of the pixel to be processed (ST11). Next, it is determined whether the calculated differential absolute value is equal to or greater than a threshold (ST12). If the absolute differential value is equal to or greater than the threshold (ST12, Yes), "1" is added to a count number C (ST13). If the absolute differential value is smaller than or equal to the threshold, processing proceeds to ST14. When it is determined that all pixels in a block are processed (ST14, Yes), the kind of noise of the peripheral pixel and the pixel to be processed is determined (ST15). Specifically, it is determined in accordance with a value of the count number C indicating the number of pixels whose differential absolute value is equal to or greater than the threshold. In accordance with a result of the determination, any one of ST16a-ST16d is performed. COPYRIGHT: (C)2010,JPO&INPIT |
