Image processing method based on wavelet transform

An image processing and wavelet transform technology, applied in the field of image processing, can solve the problem of discarding time domain information and so on

Inactive Publication Date: 2015-12-23
CHENGDU RONGCHUANG ZHIGU SCI & TECH
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[0004] The present invention provides an image processing method based on wavelet transform aiming at the deficiencies of th

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  • Image processing method based on wavelet transform
  • Image processing method based on wavelet transform
  • Image processing method based on wavelet transform

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] A kind of image processing method based on wavelet transform, it is characterized in that, following steps:

[0033] (1) Get the original image;

[0034] (2) Perform wavelet decomposition on the original image to obtain the low-frequency sub-band LL and three high-frequency sub-bands LH, HL, and HH, and perform nonlinear enhancement on the high-frequency coefficients to obtain the wavelet coefficients after image enhancement; perform wavelet analysis on the original image Decompose to obtain the low-frequency sub-band LL and three high-frequency sub-bands LH, HL, and HH, and perform nonlinear enhancement on the high-frequency coefficients to obtain the image-enhanced wavelet coefficients. The specific steps are:

[0035] (21) select a wavelet and determine the level N of a wavelet decomposition, then carry out IV layer wavelet decomposition to t...

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Abstract

The invention discloses an image processing method based on wavelet transform, belongs to the technical field of image processing methods, and solves problems that time domain information is discarded in image processing through Fourier transform. The image processing method based on wavelet transform comprises the steps that (1) an original image is acquired; (2) wavelet decomposition is performed on the original image so that a low-frequency sub-band LL and three high-frequency sub-bands LH, HL and HH are obtained, and non-linear enhancement is performed on high-frequency coefficients so that wavelet coefficients after image enhancement are obtained; and (3) wavelet inverse transform is performed on the two wavelet coefficients after processing so that the enhanced image is obtained. The image processing method based on wavelet transform is used for image processing.

Description

technical field [0001] An image processing method based on wavelet transform is used for image processing and belongs to the technical field of image processing methods. Background technique [0002] Wavelet analysis is a new time-frequency analysis method developed in the past 15 years. Its typical applications include gear variable speed control, abnormal noise of cranes, automatic target landing, discontinuity in physics, etc. The focus of frequency domain analysis is to distinguish burst signals from stable signals and quantitatively analyze their energy. Typical applications include cell membrane identification, metal surface flaw detection, fast variable detection in finance, Internet flow control, etc. From the above typical applications of signal analysis, it can be seen that time-frequency analysis is widely used, covering many fields such as physics, engineering technology, biological science, economics, etc., and in many cases, it only analyzes its time domain or...

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Application Information

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IPC IPC(8): G06T5/00G06T5/50
Inventor 张岱齐弘文
Owner CHENGDU RONGCHUANG ZHIGU SCI & TECH
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