IMAGE QUALITY IMPROVING DEVICE AND METHOD

摘要

PROBLEM TO BE SOLVED: To provide an image quality improving device for improving the sense of contrast.

SOLUTION: A Gaussian filter 2 having a first interruption frequency extracts a low-frequency component signal of a video signal. A subtractor 3 subtracts the low-frequency component signal from the video signal to extract a high-frequency component signal. A low-pass filter 5 having a second interruption frequency higher than the first interruption frequency extracts a low band side high-frequency component signal as a signal of a low band in the high-frequency component signal. A multiplier 6 multiplies the low band side high-frequency component signal by a predetermined gain G1 to generate a corrected component signal. An adder 7 adds a corrected component signal to the video signal.

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