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Background processing method for highlighting image difference

A background processing and image technology, applied in image data processing, image enhancement, image analysis, etc., can solve the problems of eliminating the influence of image background effects and different intensities, achieving high practical value, reducing image information, and eliminating image background. Effect

Pending Publication Date: 2022-02-01
SUZHOU UNIV OF SCI & TECH
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Problems solved by technology

[0003] However, when recording images with cameras and video cameras, due to different time and different conditions for recording images, such as shooting time, lighting changes, etc., the recorded intensity of the same scene is different. Using the previous image subtraction method, the subtraction The result is affected by the overall exposure, the difference in the image will be affected by the same part of the image
In addition, when the camera shakes or the image is not aligned when processing the image, resulting in a translation of the image of the same scene, the effect of removing the image background will also be affected

Method used

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  • Background processing method for highlighting image difference
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  • Background processing method for highlighting image difference

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Embodiment Construction

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0034] Such as figure 1 As shown, a background processing method for highlighting image differences, the method includes the following steps:

[0035] Step 1) First obtain a predicted image;

[0036] Step 2) Perform two-dimensional fast Fourier transform FFT2 on the predicted image to obtain the spectrum of the predicted image, and store it in the computer as known information;

[0037] Step 3) When the intensity of a certain pixel of the predicted image changes, the changed image is used as an instant image to obtain an instant image;

[0038] Step 4) Perform two-dimensional fast Fourier transform FFT2 on the real-time image to obtain the frequency spectrum of the real-time image;

[0039] Step 5) dividing each matrix element value of the spectrum matrix of the instant image by the corresponding matrix element value of the spectr...

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Abstract

The invention relates to a background processing method capable of highlighting image difference. The method comprises the following steps of carrying out Fourier transform on the discrete data of an image, and then realizing image background elimination by using a frequency spectrum multiplication and division method. The method disclosed by the invention is not influenced by the conditions of image brightness change, camera vibration, picture misalignment and the like, can completely eliminate the image background, is high in practical value, and can be applied to the fields of detecting supernova outbreak, searching asteroids around the earth and the like.

Description

technical field [0001] The invention relates to the technical field of computer image processing, in particular to a background processing method for highlighting image differences. Background technique [0002] In a large number of computer image processing technologies, such as object map inspection and weak object detection, it can have great practical value in military and civilian applications. Among them, the optical flow method and some adaptive algorithms are often used to subtract images between frames to reduce the amount of information in the image to be processed. Through image subtraction, the changes in the target image can be highlighted, so that different backgrounds can be distinguished. It has the effect of improving the signal-to-noise ratio. In the process of image transmission, due to the large amount of information, various compression methods, such as Fourier transform, cosine transform, etc., are used to discard some high-frequency information that o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/00G06T5/10G06T5/50
CPCG06T5/10G06T5/50G06T2207/20056G06T2207/20224G06T3/053
Inventor 许浩瀚
Owner SUZHOU UNIV OF SCI & TECH