Method for detecting irregular circle based on Gauss pyramid decomposition

A Gaussian pyramid, circle detection technology, applied in image analysis, image data processing, instruments, etc., can solve problems such as false detection or missed detection

Inactive Publication Date: 2011-07-20
HANGZHOU DIANZI UNIV
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Problems solved by technology

If the traditional circle target detection method is used directly on the collected images, this kind of method will cause false detection or missed detection in the high-resolution, multi-circle detection environment, especially for the detection of irregular circles, the above defects are more obvious

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  • Method for detecting irregular circle based on Gauss pyramid decomposition
  • Method for detecting irregular circle based on Gauss pyramid decomposition
  • Method for detecting irregular circle based on Gauss pyramid decomposition

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing, the present invention will be further described, and the inventive method comprises the following steps:

[0029] In step (1), the multi-resolution decomposition of the original image is realized by a Gaussian image pyramid decomposition method.

[0030] figure 1 A schematic diagram of the Gaussian decomposition. Gaussian Pyramid level approximation of the original image Scaled exploded image. First select the image with the largest difference in circle radius in the group, and the decomposition level of the group of images The specific determination methods are divided into the following two situations:

[0031] ①If the radius of the circle in the image is relatively close, such as the largest circle radius is less than or equal to 10 times the smallest circle radius, analyze the selected image with 0, 1, 2, 3, 4, 5 as the decomposition series; then decompose according to each image The analysis speed under the s...

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Abstract

The invention relates to a method for detecting an irregular circle based on Gauss pyramid decomposition. The existing circle detecting algorithm has the defects of error detection and omission detection in a high resolution ratio and multi-circle detection environment. The method comprises the following steps: aiming at a circle target in a digital image, decomposing an image into images with different resolution factors through a Gauss pyramid decomposition method; aiming at different levels of resolution factors, carrying out rough detection on an image with a lower resolution factor by using a detection method of different circles; and then carrying out precise circle detection on an image with a higher resolution factor, wherein in each detection step, a specific setting method is given for a corresponding threshold. By utilizing the method, the detection precision of irregular circle is improved and high-noise and multi-circle complicated images can be analyzed.

Description

technical field [0001] The invention belongs to the field of digital image analysis, in particular to an irregular circle detection method based on Gaussian pyramid decomposition. Background technique [0002] In practical applications, it is quite common to detect round targets, such as the detection and recognition of biomedical features such as irises, cells, and inhibition zones. Therefore, how to quickly and accurately detect circles is of great significance. [0003] With the increasing maturity of hardware devices such as photosensitive chips and imaging technology, in the actual application of image acquisition and analysis, higher resolution configurations are usually selected. While high resolution improves image quality, it is not always good for image analysis. For example, in the process of detecting irregular circular targets, high resolution will highlight the burrs and irregularities on the edges of the circle, and such defects will affect the processing and...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/13
Inventor 范影乐赵磊王海玲
Owner HANGZHOU DIANZI UNIV
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