IMAGE PROCESSOR

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 processor configured to perform denoising on an input image to generate an output image, the image processor comprising:
a transform circuit configured to transform 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; a quantization circuit configured to perform quantization on the second image data to generate third image data; a first arithmetic circuit configured to calculate a per-block noise value based on the first image data; and a first quantization value setting circuit configured to set a first quantization value per input image for quantization based on a noise value of the whole input image.