Image processing apparatus and image processing method

摘要

An image processing apparatus for processing image data formed by a set of pixel data includes a real space filter processing unit and a color space filter processing unit, wherein the real space filter processing unit calculates a real space weighting coefficient and performs weighted average of pixel data according to filter processing of an edge preservation type; pixel data of at least a target pixel of pixel data used in the color space filter processing unit is pixel data calculated by the real space filter processing unit; and of the pixel data which the color space filter processing unit uses for the weighted average, the pixel data of the target pixel is pixel data calculated by the real space filter processing unit, and the pixel data of a peripheral pixel is pixel data forming the image data before being input to the real space filter processing unit.

主权项

1. An image processing apparatus that processes image data formed by a set of pixel data of a plurality of pixels, the image processing apparatus comprising:
a real space filter processing unit that calculates a real space weighting coefficient for each peripheral pixel according to a distance on a real space between a target pixel and a peripheral pixel located around the target pixel among the plurality of pixels of image data input, and performs weighted average of pixel data of the target pixel and pixel data of the peripheral pixel using the real space weighting coefficient to calculate pixel data of the target pixel; and a color space filter processing unit that calculates a color space weighting coefficient for each peripheral pixel according to a distance on a color space between a target pixel and a peripheral pixel located around the target pixel among the plurality of pixels, and performs weighted average of pixel data of the target pixel and pixel data of the peripheral pixel using the color space weighting coefficient to calculate pixel data of the target pixel, wherein: the real space filter processing unit calculates the real space weighting coefficient and performs the weighted average of pixel data, according to filter processing of an edge preservation type; the pixel data of at least the target pixel of the pixel data used in the color space filter processing unit is the pixel data calculated by the real space filter processing unit; and of the pixel data which the color space filter processing unit uses for the weighted average with the color space weighting coefficient, the pixel data of the target pixel is the pixel data calculated by the real space filter processing unit, and the pixel data of the peripheral pixel is the pixel data forming the image data before being input to the real space filter processing unit.