Reducing chromatic aberration

摘要

A system and method for reducing chromatic aberration by aligning pixel in a color channel according to displacement from corresponding pixels in another color channel. In particular, the system calculates a feature, such as intensity, for a first block of pixels in a first color channel of an image. The feature is calculated for a second block of pixels in a second color channel of the image. Displacement is estimated between the first color channel and the second color channel by comparing the feature for the first block and the feature for the second block. At least a portion of the first color channel is aligned with at least a portion of the second color channel based on the estimated displacement.

主权项

1. A method comprising:
calculating a feature for a first block of pixels in a first color channel of an image, the feature for the first block being independent of pixel values in a second color channel of the image; calculating the feature for a second block of pixels in a second color channel of the image, the feature for the second block being independent of pixel values in the first color channel; estimating displacement between the first color channel and the second color channel by comparing the feature for the first block and the feature for the second block; and aligning at least a portion of the first color channel with at least a portion of the second color channel based on the estimated displacement.