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Image interpolation method based on weight matrix Walsh transformation

A technology of weight matrix and interpolation method, which is applied in the field of image interpolation based on the weight matrix Walsh transform, can solve the problems of low image restoration effect and high computational complexity, and achieve reduced calculation time cost, low time, and guaranteed interpolation effect of effect

Inactive Publication Date: 2018-03-27
NANJING NORMAL UNIVERSITY
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Problems solved by technology

[0004] In order to solve the problems of low image recovery effect and high computational complexity after the image interpolation method in the existing method, the present invention proposes an image interpolation method based on the weight matrix Walsh transform

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  • Image interpolation method based on weight matrix Walsh transformation
  • Image interpolation method based on weight matrix Walsh transformation
  • Image interpolation method based on weight matrix Walsh transformation

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Embodiment Construction

[0040] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0041] A kind of image interpolation method based on weight matrix Walsh transform of the present invention comprises the following steps:

[0042] Step a, determine the basic frame structure of Walsh interpolation: According to the nature of Walsh transform, namely, the binary shift and the binary convolution, the original image information is displayed from the spatial domain and the sequence domain respectively, and the Walsh transform’s binary shift and parallel The properties of meta-convolution are shown in Table 1, and the contents of Table 1 are well-known theorems. Since the value of the Walsh function is {1,-1}, such a method has great advantages in processing digital signals.

[0043] Table 1 Walsh transformation properties

[0044]

[0045] Define the Walsh function:

[0046]

[0047] sgn() is a symbolic function; k i It is th...

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Abstract

The invention proposes an image interpolation method based on weight matrix Walsh transformation, and the method comprises the following steps: 1, carrying out the research and analysis of the definition and quality of Walsh transformation, and then further proposing an improvement method for designing a Walsh filtering template; 2, improving the limitation of the size of a Walsh template througha method based on weight matrix splicing; 3, enabling a global optimization algorithm-genetic algorithm to be used for a test image, and solving an optimal weight coefficient; 4, enabling the method to be used in a specific image embodiment, and analyzing the application effect and time efficiency of the method through the comparison with a conventional method. The invention provides a rapid and effective image interpolation technology for image segmentation and registration.

Description

technical field [0001] The invention relates to the technical fields of image processing, pattern recognition and computer vision, and in particular to an image interpolation method based on weight matrix Walsh transform. Background technique [0002] Existing image interpolation methods include the nearest neighbor interpolation method, bilinear interpolation method, polynomial interpolation method, etc. The main design idea is based on the condition that the original image satisfies Shannon's theorem, and the reconstructed discretized image is restored and filtered to meet expectations and meet expectations. Sample it. The existing problems of the current interpolation method: the nearest neighbor interpolation method tends to produce jagged edges and block effects, the bilinear interpolation method tends to blur the edge of the image, and the polynomial interpolation method cannot improve the image edge information to an ideal state. [0003] In order to solve the above ...

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Application Information

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IPC IPC(8): G06T3/40G06T5/10
CPCG06T3/403G06T5/10G06T2207/20192G06T2207/20048
Inventor 张煜东王水花刘方园
Owner NANJING NORMAL UNIVERSITY