| 摘要 |
In an image processing device, a lowpass filter extracts a low-frequency component of 8-bit input image data VI1 to obtain 10-bit image data LP1 expanded in the course of an operation during the extraction of the low-frequency component. Two less significant bits of the image data LP1 are rounded in a rounding circuit, and the obtained image data is output as 8-bit image data RD1. A comparator compares the image data RD1 with image data VI2, and an image output control circuit outputs a control signal OC1 based on a result CP1 of the comparison. A bit addition circuit adds 2 bits to the LSB of the image data VI1 to output 10-bit image data BS1. An output image selection circuit selects the image data LP2 or the image data BS2 based on the control signal OC1 to output as 10 bit-image data VO1. |
