IMAGE PROCESSING METHOD

摘要

A setting circuit sets a quantization value per input image on the basis of a noise value of the whole input image, and a quantization circuit performs quantization on first image data to generate second image data. Quantization value based on the noise value the whole input image can realize appropriate denoising depending on the noise level of the whole input image.

主权项

1. An image processing method for denoising of an input image to generate an output image, the method comprising:
transforming first image data of a spatial region extracted from the input image in a unit of a predetermined block into second image data of a frequency region including a plurality of frequency components; performing quantization on the second image data to generate third image data; calculating a per-block activity evaluation value based on the first image data; and setting a per-block quantization value for quantization based on the per-block activity evaluation value.