Image processing device and image processing method

摘要

In a first filtering processing step, RAW data of a source image is subjected to a pixel-based filtering process along a first array direction to divide the RAW data into a first luminance data and a first color carrier data. In a first luminance distribution equalization processing step, the luminance distribution of the first luminance data in the first array direction is corrected to be uniform to produce a second luminance data. In a first color array reproduction processing step, the first color carrier data is re-synthesized with the second luminance data to produce a first multiple-color array data. In a second filtering processing step, the first multiple-color array data is subjected to a pixel-based filtering process along a second array direction to divide the first multiple-color array data into a third luminance data and a second color carrier data. In a second luminance distribution equalization processing step, the luminance distribution of the third luminance data in the second array direction is corrected to be uniform to produce a fourth luminance data. In a second color array reproduction processing step, the second color carrier data is re-synthesized with the fourth luminance data to produce a second multiple-color array data.

主权项

1. An image processing device, including:
a first distribution equalization processor for generating a first multiple-color array data by inputting RAW data of a source image, the source image RAW data being outputted by mixing an even number of pixels from an image sensor having multiple-color pixels where an array of colors has a periodicity and having a pixel data distribution non-uniform in first and second array directions orthogonal to each other, and by correcting the pixel data distribution of the inputted source image RAW data to be uniform in the first array direction; and a second distribution equalization processor for inputting the first multiple-color array data and generating a second multiple-color array data by correcting the pixel data distribution of the inputted first multiple-color array data to be uniform in the second array direction, wherein the first distribution equalization processor includes: a first filtering processor for dividing the source image RAW data into a first luminance data and a first color carrier data that are continuous data by performing a pixel-based filtering process to the source image RAW data along the first array direction; a first luminance distribution equalization processor for generating a second luminance data by correcting a luminance distribution of the first luminance data to be uniform in the first array direction; and a first color array reproduction processor for generating the first multiple-color array data by re-synthesizing the first color carrier data with the second luminance data, and the second distribution equalization processor includes: a second filtering processor for dividing the first multiple-color array data into a third luminance data and a second color carrier data that are continuous data by performing a pixel-based filtering process to the first multiple-color array data along the second array direction; a second luminance distribution equalization processor for generating a fourth luminance data by correcting a luminance distribution of the third luminance data to be uniform in the second array direction; and a second color array reproduction processor for generating the second multiple-color array data by re-synthesizing the second color carrier data with the fourth luminance data.