Image processing method and image processing device

Abstract

The invention discloses an image processing method and an image processing device, which are used for filtering images. The image processing method includes the following steps: (A) generating a weight for each reference pixel, wherein the image includes a plurality of reference pixels, and the size of the weight is between a target pixel and the reference pixel corresponding to the weight and (B) performing a wireless impulse response filtering operation according to the weights, the pixel value of the target pixel and the pixel values ​​of the reference pixels to obtain a wireless impulse response filtering value of the target pixel.

Description

technical field [0001] The present invention relates to image processing, in particular to an image processing method and an image processing device based on infinite impulse response (IIR). Background technique [0002] figure 1 is a schematic diagram of a window for image processing. The 5×5 window (including 25 pixels) in the figure is used to perform image processing on the central target pixel P(i,j), and other pixels in the window are reference pixels. Assume that when performing infinite impulse response (infinite impulse response, hereinafter referred to as IIR) filtering operation in the space domain, the image is processed in the scan order (Raster scan) from upper left to lower right, so the pixels in the white part of the window are untouched The original pixel processed by IIR filtering, whose pixel value is the original pixel value PV ORI , the pixels in the gray part are pixels that have been previously processed by IIR filtering (abbreviated as IIR pixels)...

AI Technical Summary

Problems solved by technology

However, taking the scanning order from upper left to lower right as an example, the IIR filter only takes pixels to the left, upper left, upper, and / or upper right of the target pixel as references, and does not consider pixels in other directions, so it is easy to cause Image dragging phenomenon in which pixel features on the left, upper left, upper, and / or upper right spread to other directions

This image dragging phenomenon is easy to cause color distortion, and if it occurs at the edge of the image, it will cause the edge of the image to be blurred

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