Single image super-resolution reconstruction method based on TV priori

A technology of super-resolution reconstruction and single image, which is applied in image analysis, image enhancement, image data processing, etc., to overcome the lack of image edge information and improve the effect

Active Publication Date: 2019-10-01
LIAONING NORMAL UNIVERSITY
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However, so far there is no report on applying the TV

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  • Single image super-resolution reconstruction method based on TV priori
  • Single image super-resolution reconstruction method based on TV priori
  • Single image super-resolution reconstruction method based on TV priori

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Embodiment Construction

[0023] The single image super-resolution reconstruction method based on TV prior of the present invention, carries out according to the following steps successively:

[0024] Step 011: Obtain an image whose resolution is to be increased, denoted as Image_ori;

[0025] Step 012: If figure 1 As shown, the image Image_ori is upsampled by the bicubic interpolation omoms3 algorithm, and the obtained image is recorded as Image_omoms3;

[0026] Step 021: Set the size of the image Image_omoms3 as M*N, move point by point from the upper left corner of the image to obtain M*N blocks; start from the first block, such as figure 2 As shown, 28 TV direction templates with a size of 3*3 are established centering on the pixel to be repaired, which are recorded as o(n), n=1, 2, 3...28, and n is the serial number of the direction template, and the template The 9 pixels are recorded as {d1, d2, d3, d4, d5, d6, d7, d8, d9} from top to bottom and from left to right, and the 28 direction templat...

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Abstract

The invention discloses a single image super-resolution reconstruction method based on TV priori. The method comprises the following steps: firstly, carrying out up-sampling preprocessing on an imageto be improved in resolution by utilizing a bicubic interpolation algorithm omoms3; extracting TV prior information from the preprocessed image according to 28 TV direction templates; and finally, introducing TV prior information into a non-local regression framework, so that the texture and edge information of the super-resolution image can be better reserved, and the phenomenon of insufficient image edge information generated by a traditional interpolation algorithm can be overcome, and therefore, a super-resolution reconstructed image can be obtained, and a super-resolution effect can be greatly improved.

Description

technical field [0001] The invention relates to a single image super-resolution reconstruction method, in particular to a TV prior-based single image super-resolution reconstruction method capable of enhancing image edges. Background technique [0002] Currently, image super-resolution reconstruction is a fairly active research field, which provides solutions to the low-resolution limitation from mobile phone imaging to remote sensing imaging to medical imaging. Low-quality images are usually caused by low-cost sensor capture, narrow-band transmission, and poor light interference. When low-quality images are widely used in high-definition displays, visual analysis and recognition tasks tend to be performed in higher-resolution versions. Therefore, it is necessary to estimate the high-resolution image based on the content of the low-resolution image, that is, image super-resolution reconstruction. [0003] At present, people can only do everything possible to mine prior know...

Claims

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Application Information

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IPC IPC(8): G06T3/40G06T5/00
CPCG06T3/4053G06T5/005G06T2207/10004
Inventor 傅博李艺傅世林张湘怡王相海
Owner LIAONING NORMAL UNIVERSITY
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