Image processing method for detecting similar round by using improved hough transformation

A circular detection and image processing technology, applied in the field of image processing, can solve problems such as poor anti-interference performance, occupy a lot of memory, and reduce algorithm performance, and achieve the effect of reducing memory requirements, improving detection accuracy, and improving algorithm efficiency.

Inactive Publication Date: 2011-08-10
黄晓华
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Problems solved by technology

For a long time, Hough transform has been a practical and effective method for detecting straight lines/circles/ellipses, but for detecting circles, Hough transform also has several major disadvantages: 1. It takes up a lot of memory; 2. Unable to detect irregular round objects (such as bubbles, cells, etc.); 3. Poor anti-interference performance;
Although the random Hough

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  • Image processing method for detecting similar round by using improved hough transformation
  • Image processing method for detecting similar round by using improved hough transformation
  • Image processing method for detecting similar round by using improved hough transformation

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Embodiment Construction

[0022] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0023] This embodiment is based on the realization of cell detection, and the input image is a microscopic photo image of cells.

[0024] Such as figure 1 As shown, this embodiment provides an image processing method using the improved Hough transform for circle-like detection, including the following steps:

[0025] Step 1, image preprocessing, due to the defects of the lighting or imaging system, the brightness and contrast of the acquired image to be processed are uneven, resulting in inconsistent processing effects of the same set of algorithms and parameters on ...

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Abstract

The invention provides an image processing method for detecting a similar round by using improved hough transformation. The method comprises the following seven steps of: preprocessing an image, extracting an edge and filtering out noises, weighing along a gradient direction and projecting the hough transformation, performing low-pass smooth filtering on a projection space, contracting and binaryzing, positioning a circle center and estimating a radius. Compared with the conventional method for detecting the round by using the hough transformation, the method has the advantages that: on the one hand, the requirement of an algorithm on a memory is reduced and the algorithm efficiency is improved; on the other hand, the performance of the algorithm for detecting irregular similar round objects is improved; meanwhile, the detection precision of the algorithm under the condition of a larger variation region of the round radius is enhanced.

Description

technical field [0001] The invention relates to an image processing method for circle-like detection by using the improved Hough transform, which is used for image processing, computer vision and industrial automation inspection. It belongs to the technical field of computer information image processing. Background technique [0002] Fast and accurate detection of circular and quasi-circular objects has broad application prospects in the fields of computer vision and pattern recognition. For example, industrial inspection lines, biomedical monitoring equipment, and automated assembly lines all involve the application of computer vision technology for circular and quasi-circular detection. For a long time, Hough transform has been a practical and effective method for detecting straight lines / circles / ellipses, but for detecting circles, Hough transform also has several major disadvantages: 1. It takes up a lot of memory; 2. Unable to detect irregular round objects (such as b...

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Application Information

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IPC IPC(8): G06K9/00G01B11/08G06T7/00G06K9/36G06T7/62
Inventor 黄晓华
Owner 黄晓华
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