| 摘要 |
For each pixel in an image (Din), a contrast correlation value ( CT ) is detected for peripheral areas centered around the pixel to be corrected (1), a contrast enhancement coefficient ( Ken ) is determined in accordance with the contrast correlation value ( CT ) (2), and in accordance with the enhancement coefficient ( Ken ), local contrast is enhanced for each pixel and an intermediate image (D3) is generated (3). When performing noise reduction (5) by smoothing the intermediate image (D3) in the time direction, the degree of noise reduction is controlled in accordance with a noise reduction coefficient ( Knr ) that is large where the enhancement coefficient ( Ken ) is large. With respect to a low-contrast image such as one captured under fog, haze or other poor weather conditions, the contrast in areas having reduced contrast is appropriately improved, and the noise that is enhanced in conjunction with contrast improvement is reduced, enabling a high quality image to be obtained. |
