Interpolation processing method for digital image

Abstract

The interpolation processing method for digital image includes first determining the mapping point coordinates (x, y) of the pixels of object image in source image, then determining the Gaussian weight Wi based on the adjacent pixel coordinates (m, n), and finally calculating the mapping point value f(x, y) based on the Gaussian weight Wi and the adjacent pixel value Vi. By means of Gaussian weight interpolation, the present invention has shortened interpolation processing time and raised image quality.

Description

technical field [0001] The invention relates to a digital image processing method, in particular to a method for interpolating digital images using Gaussian weights. Background technique [0002] When resizing or transforming an image, the original pixels are rearranged and new pixels are generated. When the image is enlarged, the original pixel gap expands, and some new pixels are needed to fill the gap. When the image is reduced, the pixels start to mix and generate new pixels. In order to fill the generated gap, the color value of the adjacent pixel must be calculated and used. This value is used to fill or interpolate gaps. This is what we call interpolation. The interpolation method is the method used when the image redistributes pixels. The purpose is to determine the information of the gap points between known points in the image. [0003] There are many traditional digital image interpolation methods, among which the fastest is NearestNeighbor (nearest neighbor), w...

AI Technical Summary

Problems solved by technology

[0003] There are many traditional digital image interpolation methods, among which the fastest is NearestNeighbor (nearest neighbor), which simply copies adjacent pixels. Although this method is fast, it often produces aliasing; Bilinear The (bilinear interpolation) method takes the average color of each pixel and its four adjacent pixels, and then creates a moderate shadow between pixels to smooth the transition. The effect is better, but it takes a long time; The Bicubic calculation method (bi-cubic interpolation) is similar to Bilinear, the difference is that it calculates the color average value of each pixel and the eight pixels in the direction of the adjacent "m" font. This algorithm works best, but it is the most time consuming

The above interpolation methods all have disadvantages, either the effect is not good, or it takes a long time. Therefore, after the image is transformed, how to complete the image interpolation in a short time to reduce the waiting time for interpolation , is currently in digital image processing, the urgent need for products and the focus of the direction that developers should work hard

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