Image processing apparatus, image processing method, and computer program

摘要

An apparatus and a method for efficiently executing correction of false color, such as purple fringe, caused by chromatic aberration and for generating and outputting high-quality image data are provided. A white-saturated pixel is detected from image data, a false-color-pixel detection area is set around the detected white-saturated pixel, and pixels having color corresponding to false color such as purple fringe are detected from the set area. The detected pixels are determined as false-color pixels and correction processing based on the values of the surrounding pixels is performed on the determined false-color pixels. With this configuration, an area of false color such as purple fringe generated in the neighborhood of a white-saturated pixel can be efficiently detected, pixel values can be partially corrected, and high-quality image data can be generated and output without affecting the entire image.

主权项

1. A method for automatically correcting false color artifacts in a region of a color digital image comprised of a two-dimensional array of image pixels, the false color artifacts occurring around saturated image pixels captured by an electronic imager associated with a color filter array, the method being performed on a processor and comprising the steps of:
(a) detecting saturated image pixels in the color digital image through threshold processing for at least a color component of the color digital image; (b) providing a search area through dilate processing for portions around the detected saturated image pixels; (c) providing false color detection pixels in the search area; (d) providing false color pixels in the color detection pixels by checking whether color components of the false color detection pixels indicate the occurrence of the false color artifacts; and (e) correcting pixel values of the false color pixels.