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Terahertz image enhancing method and system

An image enhancement and terahertz technology, applied in the field of terahertz image enhancement, can solve problems such as lack of versatility and intuition, complex mathematical operations, etc.

Inactive Publication Date: 2015-04-29
深圳市太赫兹科技有限公司
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  • Abstract
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Problems solved by technology

[0003] The technical problem solved by the present invention is to construct a terahertz image enhancement method and system, which overcomes the lack of versatility and intuition that the prior art terahertz image enhancement usually involves complex mathematical operations

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  • Terahertz image enhancing method and system

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Embodiment Construction

[0022] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0023] Such as figure 1 Shown, the specific embodiment of the present invention is: provide a kind of terahertz image enhancement method, comprise the steps:

[0024] Median filter denoising: first perform median filter on the original terahertz image, and then perform linear gray scale stretching on the image in the gray scale range of 0-255.

[0025] The specific implementation process is as follows: Median filtering is a commonly used nonlinear smoothing filter. Its basic principle is to replace the value of a point in a digital image with the median value of each point in a field of the point. Let f(x,y) be the gray value of the image pixel, and the filter window is defined as the median filter of A as follows:

[0026] f^(x,y)=MED{f(x,y)}(x,y)∈A (1)

[0027] Then do linear grayscale stretching in the grayscale range of 0-255 to obtain a co...

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Abstract

The invention relates to a terahertz image enhancing method and system. The method comprises steps as follows: median filtering and noise reduction, non-local filtering, frequency-domain high-pass filtering, edge processing and overlapping processing are performed on a terahertz image, the adopted non-local filtering is different from domain filtering adopted in some methods, speckle noises can be filtered out to a certain extent through domain filtering, but edge information is more fuzzy, the non-local filtering is more resistant to the noises, and the filtered-out part comprises little geometrical structure information.

Description

technical field [0001] The present invention relates to a terahertz image enhancement method and system, in particular to a terahertz image enhancement processing method and system. Background technique [0002] There are many reasons that affect the resolution and clarity of terahertz images, one of which is that the intensity of terahertz radiation changes due to laser power jitter, which leads to jitters in the gray distribution of terahertz images, that is, there are obvious bright spots. And at the same time, it may be accompanied by the problem that the image background is dark and the contrast is not strong. There are many methods for noise reduction and enhancement of terahertz imaging. Commonly used are noise reduction, edge detection and enhancement based on wavelet transform. However, these methods usually involve more complex mathematical operations, lack of versatility and intuition. Contents of the invention [0003] The technical problem to be solved by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/21G06T5/00
Inventor 刘艺青
Owner 深圳市太赫兹科技有限公司
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