Image interpolation method and system based on dislocation sampling, and storage medium

An interpolation method and image sampling technology, which is applied in image data processing, graphics and image conversion, instruments, etc., can solve problems such as inability to adapt to the pixel structure, achieve good objective quality, fast and efficient reconstruction, and improve image storage and transmission efficiency. Effect

Active Publication Date: 2021-04-02
JINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the use of image-independent interpolation, their common disadvantage is that they cannot adapt to the pixel structure in different images

Method used

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  • Image interpolation method and system based on dislocation sampling, and storage medium
  • Image interpolation method and system based on dislocation sampling, and storage medium
  • Image interpolation method and system based on dislocation sampling, and storage medium

Examples

Experimental program
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Effect test

Embodiment 1

[0063] In this embodiment, the bilinear interpolation method is used to reconstruct the image, such as image 3 shown, including the following steps:

[0064] S1. Perform misplaced sampling on the high-resolution image to obtain a downsampled image, specifically:

[0065] Displaced downsampling of high-resolution images, such as figure 2 as shown, figure 2 The black dots in are the sampling points, divide the image into an image composed of 2×2 pixel blocks, and each block samples one pixel correspondingly, and for the 2×2 pixel blocks in odd rows, take the upper left corner pixel in the block as the sampling point , the 2×2 pixel block in the even row takes the upper right corner pixel in the block as the sampling point.

[0066] S2. Restoring each pixel in the downsampled image to a sampling position corresponding to the original high-resolution image;

[0067] S3. Use the bilinear interpolation method to interpolate and predict the unknown pixels, specifically:

[00...

Embodiment 2

[0080] In this embodiment, the bicubic interpolation method is used to reconstruct the image, such as Figure 6 shown, including the following steps:

[0081] S1. Perform misplaced sampling on the high-resolution image to obtain a downsampled image, specifically:

[0082] Displaced downsampling of high-resolution images, such as figure 2 as shown, figure 2 The black dots in are the sampling points, divide the image into an image composed of 2×2 pixel blocks, and each block samples one pixel correspondingly, and for the 2×2 pixel blocks in odd rows, take the upper left corner pixel in the block as the sampling point , the 2×2 pixel block in the even row takes the upper right corner pixel in the block as the sampling point.

[0083] S2. Restoring each pixel in the downsampled image to the sampling position of the original high-resolution image;

[0084] S3. Use bicubic interpolation method to perform interpolation prediction on unknown pixels, specifically:

[0085] All u...

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Abstract

The invention discloses an image interpolation method and system based on misplaced sampling and a storage medium. The method comprises the following steps: performing misplaced downsampling on an original image; restoring each pixel in the down-sampled image to the sampling position of the original image; reconstructing an image of an unknown pixel by adopting a bilinear interpolation method or abicubic interpolation method; wherein the bilinear interpolation method is divided into two rounds of interpolation, three adjacent known pixels are predicted by using the bilinear interpolation method in the first round and unknown pixels are predicted by using the bilinear interpolation method in the second round and the rest unknown pixels are predicted by four known pixels in the vertical andhorizontal directions; wherein the bicubic interpolation method is that an unknown pixel is obtained by predicting 20 adjacent pixels by using the bicubic interpolation method; according to the method, a bilinear interpolation method and a bicubic interpolation method based on staggered sampling are provided, and compared with the traditional bilinear interpolation and bicubic interpolation basedon direct sampling, the sampling model is changed, so that the reconstructed image has better effect and quality.

Description

technical field [0001] The invention belongs to the technical field of image interpolation, and in particular relates to an image interpolation method, system and storage medium based on misplaced sampling. Background technique [0002] In recent years, interpolation has played an extremely important role in many fields of image processing, and many researchers have made great contributions to the improvement of interpolation algorithms. From the nearest neighbor interpolation method, bilinear interpolation method, bicubic interpolation method to the later edge-based interpolation method and autoregressive interpolation algorithm, etc., the visual effect of the processed image is getting better and better. Many existing image interpolation techniques It was developed at different levels by balancing computational complexity and processing image visual effects. The popular interpolation methods commonly used in image and video software and hardware products are bilinear inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40
CPCG06T3/4007G06T3/4023
Inventor 项世军黄明惠
Owner JINAN UNIVERSITY
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