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Method for detecting precision of image displacement detection algorithm

A technology for displacement detection and image detection, applied in the field of image processing, can solve the problem that the accuracy of the image displacement detection algorithm is difficult to accurately measure, and achieve the effect of avoiding the reduction of efficiency, measurement accuracy and error increase.

Pending Publication Date: 2021-03-16
杭州鲁尔物联科技有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the technical problem that the accuracy of the current image displacement detection algorithm is difficult to accurately measure

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  • Method for detecting precision of image displacement detection algorithm
  • Method for detecting precision of image displacement detection algorithm
  • Method for detecting precision of image displacement detection algorithm

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Embodiment 1

[0023] A method for testing the accuracy of image displacement detection algorithms, such as figure 1 As shown, this embodiment includes the following steps:

[0024] (1) Transform the original image into the frequency domain through Fourier transform, and perform artificial displacement in the frequency domain.

[0025] Fourier transform the original image to the frequency domain:

[0026]

[0027] Among them, f(x, y) represents the original image, F(u, v) is its Fourier transform, and further can be obtained

[0028]

[0029] where x 0 、y 0 are the artificial displacements of the original image in the horizontal and vertical directions respectively, M and N are the number of pixels in the horizontal and vertical directions of the image respectively, for a given artificial displacement (x 0 ,y 0 ),Calculate The value of the original image can be obtained by artificially shifting the expression in the frequency domain. Since the digital image needs to be filled w...

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Abstract

The invention relates to the technical field of image processing, in particular to a method for detecting the precision of an image displacement detection algorithm, which comprises the following steps of: performing Fourier transform on an original image to a frequency domain, and performing manual displacement in the frequency domain; using inverse Fourier transform to return to a time domain toobtain a shift image, and abnodoning an imaginary part of the shift image; inputting the original image and the shift image into an image displacement detection algorithm to obtain a detection displacement value output by the image displacement detection algorithm, and calculating an error between the detection displacement value and manual displacement; repeating the above steps for many times to obtain a plurality of errors, performing discrete frequency domain transformation on the plurality of errors, abandoning low-frequency system errors, and obtaining measurement errors of the image displacement detection algorithm. The method has the advantages that the problems of efficiency reduction and error increase caused by the adoption of an interpolation method are solved, discrete frequency domain transformation is conducted on measurement errors obtained multiple times, high-frequency measurement errors are obtained, and the method for accurately measuring the precision of the imagedisplacement detection algorithm is provided.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method for detecting the accuracy of an image displacement detection algorithm. Background technique [0002] In scenarios such as industrial visual inspection that need to detect the two-dimensional plane motion of the target, in order to verify the accuracy of the image displacement detection algorithm, it is necessary to artificially manufacture the image displacement, and compare the accuracy of the detection algorithm results under the condition of known displacement. There are two methods of artificial image displacement: shooting the actual moving object with obvious corner and edge features, using sub-pixel-level corner and edge detection methods to obtain real displacement; using digital image processing methods to directly manipulate image pixels to generate specified displacement , direct translation for integer pixels, and translation for sub-pixels using i...

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Application Information

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IPC IPC(8): G06T7/262G06T7/00
CPCG06T7/262G06T7/97G06T2207/20056
Inventor 赵文一王一妍江子君宋杰胡辉
Owner 杭州鲁尔物联科技有限公司
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