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Image denoising method

A technology of denoising and image histogram, applied in the field of image processing, can solve problems such as image noise and affect image quality, achieve good effect, reduce the influence of image edge blur, and ensure the effect of quality and effect

Pending Publication Date: 2021-04-30
HOHAI UNIV
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Problems solved by technology

However, digital images are often disturbed by various external factors during the process of acquisition, transmission and processing, forming noise in the image and affecting image quality

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Embodiment Construction

[0030] Image noise refers to unnecessary or redundant interference information existing in image data. Various factors in the image that hinder people from accepting its information can be called image noise. In layman's terms, noise makes the image unclear. Common noises in images are Gaussian noise, salt and pepper noise, and Poisson noise. Gaussian noise refers to a type of noise that obeys a Gaussian distribution (normal distribution), usually sensor noise caused by poor lighting and high temperature. Usually in RGB images, the appearance is more obvious. Salt and pepper noise is usually random black and white light and dark spots generated by image sensors, transmission channels, decompression processing, etc., which may have black pixels in bright areas or white pixels in dark areas (or both ). Poisson noise is a type of noise that conforms to the Poisson distribution, and the Poisson distribution is suitable for describing the probability distribution of the number ...

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Abstract

The invention relates to an image denoising method. The method comprises the following steps: 1, acquiring a digital image; 2, analyzing the noise type in the digital image, namely establishing an image histogram of the digital image, respectively adding different types of noise into a noiseless image histogram to form an image histogram model respectively containing Gaussian noise, Poisson noise, speckle noise and salt and pepper noise, and calculating the noise type of the digital image; analyzing a noise type existing in the digital image by using a grey correlation analysis method; 3, after the noise type in the image is analyzed, respectively processing the noise of different types by adopting a corresponding denoising method.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image denoising method. Background technique [0002] With the popularization and application of information technology and the development of high-speed wireless communication technologies such as 4G and 5G, smart phones have become an indispensable item in life, and digital image information is always active in our lives; Processing technology is constantly evolving and improving. Digital image processing technology mainly uses computers or other hardware to efficiently process a large amount of digital image information. The full use and digital processing of image information can meet the application requirements of different fields. At present, the main research directions of digital image processing technology generally include: image digitization and compression coding, image enhancement and restoration, image segmentation and restoration, image analy...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T5/40
CPCG06T5/40G06T2207/10004G06T2207/20032G06T5/70
Inventor 畅佳李东新
Owner HOHAI UNIV
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