Image correction method and device and storage medium

Abstract

The invention provides an image correction method and device and a storage medium in the technical field of image processing. The method comprises the following steps of performing rectangular boundary extraction in images and image correction, corresponding linear equations to parameter space; applying constraint conditions to three parameters in spherical space; utilizing average value of parameters in linear equations; determining the three parameters corresponding to the linear equations of boundaries; obtaining linear equations of boundaries of the rectangular graphs. The method is simple, high in extraction efficiency and precision and wide in application range. Therefore, image boundary extraction efficiency is greatly improved. Constraint conditions of conversion points in a parameter space on a spherical surface are continuous. The problem that a traditional discrete image boundary extraction method based on Hough transform is low in precision is solved. Meanwhile, the defect that a method for extracting boundaries of images based on Hough transform cannot extract the boundary with the inclination angle of pi / 2 relative to a horizontal coordinate axis is overcome, so that obtained images are corrected based on a two-dimensional spatial interpolation function.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image correction method, device and storage medium. Background technique [0002] Image processing technology is a technology that uses computers to process image information. The application fields of image processing also involve all aspects of human life and work, including aerospace and aviation technology, biomedical engineering, communication engineering, industry and engineering, military and public security, cultural and art etc. In the field of biomedicine, the analysis of medical images by image recognition algorithms provides a large amount of information for disease assessment, promotes biomedical research, and provides convenience for disease diagnosis; Extract information from the image of the document, so that the information on the document can be easily extracted; image recognition brings convenience to our daily life and work, image recognit...

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Problems solved by technology

[0006] The object of the present invention is to provide an image correction method, device and storage medium, which converts a straight line in the original space into a point in the three-dimensional space in the parameter space. The efficiency of image boundary extraction is improved. By adopting the image boundary extraction method in which the constraint condition of the conversion point on the spherical surface in the parameter space is continuous, it overcomes the problem of low precision of the traditional discrete image boundary extraction method based on Hough transform. The extraction accuracy Great improvement can be obtained, and at the same time, it can avoid the disadvantage that the method of extracting image boundaries based on Hough transform cannot extract the boundary with an inclination angle of π / 2 from the horizontal coordinate axis, so that the obtained image can be corrected based on the two-dimensional space interpolation function

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