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Method for magnifying quadric surface image fused with first-order gradient

A quadratic surface and gradient technology, which is applied in the field of image processing, can solve the problem of poor structural similarity in image enlargement effect, and achieve the effect of improving peak signal-to-noise ratio and structural similarity

Pending Publication Date: 2022-07-01
嘉兴南湖学院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the interpolation image enlargement method (Bicubic) and the machine learning image enlargement method (ANR, NE+LEE, A+) are usually used for image enlargement, and the image enlargement effect and structural similarity of these two methods are poor

Method used

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  • Method for magnifying quadric surface image fused with first-order gradient
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  • Method for magnifying quadric surface image fused with first-order gradient

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Embodiment 1

[0044] A method for enlarging a quadratic surface image that integrates first-order gradients of the present invention, such as Figure 1-7 shown, including the following steps:

[0045] S1: Extract the area [i, i+1]*[j, j+1] of the pixel point (i, j) of the image to be enlarged and the corresponding pixel value and first-order gradient, such as Figure 2-3 shown; area [i, i+1]*[j, j+1] includes pixels (i, j), (i+1, j), (i, j+1), (i+1, j +1), extract the pixel values ​​and first-order gradients of 4 pixel points at the same time.

[0046] S2: Translate the area [i, i+1]*[j, j+1] to the area [0, 1]*[0, 1], the corresponding pixel value and the first-order gradient remain unchanged; i, j), (i+1, j), (i, j+1), (i+1, j+1), and their pixel values ​​and first-order gradients, shift 4 pixels to the left by j The pixel is shifted up by i pixels, and its corresponding pixel value and first-order gradient are unchanged and shifted to the corresponding position; the coordinates of the...

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Abstract

The invention provides a quadric surface image magnification method fused with a first-order gradient, and the method comprises the steps: S1, extracting a region [i, i + 1] * [j, j + 1] of a pixel point (i, j) of a to-be-magnified image, and a corresponding pixel value and the first-order gradient; s2, translating the region [i, i + 1] * [j, j + 1] to the region [0, 1] * [0, 1], and keeping the corresponding pixel value and first-order gradient unchanged; s3, constructing a quadric surface S by utilizing a region [0, 1] * [0, 1], a pixel value corresponding to the region [0, 1] * [0, 1] and a first-order gradient; s4, according to the magnification times, extracting a compensation region [i, i + 1] * [j, j + 1] of the pixel points (i, j) of the to-be-magnified image, and translating the to-be-magnified image to the compensation region [0, 1] * [0, 1]; s5, gridding the compensation area [0, 1] * [0, 1], and calculating a compensation value by using the gridded compensation area [0, 1] * [0, 1] and the quadric surface S; and S6, constructing a compensation block by using the calculated compensation value, and replacing the pixel point by using the compensation block to construct an amplified image. According to the method, the peak signal-to-noise ratio and the structural similarity of the amplified image are improved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a quadratic surface image enlarging method integrating first-order gradients. Background technique [0002] At present, there are still many video files and signal sources with relatively low resolution, and these low-resolution video or image files and signal sources need to be enlarged when displayed on a high-resolution display device. In the prior art, the interpolation image enlargement method (Bicubic) and the machine learning image enlargement method (ANR, NE+LEE, A+) are usually used for image enlargement, and the image enlargement effect and structural similarity of these two methods are poor. To this end, the present invention proposes a quadratic surface image enlargement method integrating first-order gradients. SUMMARY OF THE INVENTION [0003] In order to solve the above problems, the present invention provides a quadratic surface image enlarging method ...

Claims

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Application Information

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IPC IPC(8): G06T3/40
CPCG06T3/40
Inventor 刘宏兵张寅昊谢莉萍涂现峰朱美瑶王宇喆
Owner 嘉兴南湖学院