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Mobile-phone screen angular point detection method based on matching of Hough transform template

A mobile phone screen and template matching technology, which is applied to measuring devices, computer components, character and pattern recognition, etc., can solve the problems of high technical requirements for cameras, time-consuming and manpower-consuming, and low accuracy, so as to avoid uncertainty, Reduction of manpower, effect of high accuracy

Active Publication Date: 2017-07-07
HUIZHOU XUXIN PRECISION ELECTRONICS EQUIP
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AI Technical Summary

Problems solved by technology

The existing technology one is manual extraction, which is time-consuming and labor-intensive, and the effect is not good
The second is to control the camera and only shoot directly at the screen. This requires very high technical requirements for the camera, and it is easy to make mistakes
The third is that the existing technology is not effective and the accuracy is not high

Method used

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  • Mobile-phone screen angular point detection method based on matching of Hough transform template
  • Mobile-phone screen angular point detection method based on matching of Hough transform template
  • Mobile-phone screen angular point detection method based on matching of Hough transform template

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Embodiment Construction

[0026] In the following, the technical solution of the present invention will be clearly and completely explained and described in conjunction with the accompanying drawings in the present invention.

[0027] The invention proposes a mobile phone screen corner point detection method based on Hough transform template matching. The method determines the real position of the screen on the photographed mobile phone screen pictures. figure 1 is a flow chart of the method of the present invention. Such as figure 1 Shown, the inventive method comprises the steps:

[0028] Step 1, the present invention uses Hough transform, and according to the nature of the mobile phone screen picture, the picture needs to be morphologically processed. After proper erosion of the picture, the picture is expanded by the same factor to eliminate random noise in the picture and interference signals such as moiré in the screen area of ​​the mobile phone. Appropriate scale-down processing is performed ...

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Abstract

The invention relates to a mobile-phone screen angular point detection method based on matching of a Hough transform template. The method comprises the steps that 1) morphological transformation of images is used to preprocess a mobile-phone screen area, and interference signals as noises and Moire patterns; 2) an image obtained in the step 1) is reduced to a certain scale, an edge detection algorithm is used to find boundaries in the image, Hough transform is used to vote boundaries, straight line segments existing in the image are obtained, four most proper line segments are selected form a straight line segment set, and straight lines in which the four line segments are positioned can form a quadrangular screen area; and 3) an angular point template is generated adaptively by utilizing four included angles of the obtained quadrangular area, the template is further positioned accurately in areas near four vertexes of the quadrangle, and a final screen area detection result is obtained.

Description

technical field [0001] The invention belongs to the field of object detection and identification, and relates to detecting a specific object from an image, in particular to a method for extracting a screen of a mobile phone. Background technique [0002] There is no clear mathematical definition of the corner point, but it is generally believed that the corner point is the point where the brightness of the two-dimensional image changes sharply or the point where the curvature of the edge curve of the image is the maximum value. These points can effectively reduce the amount of information data while retaining the important features of image graphics, so that the information content is high, effectively improving the calculation speed, which is conducive to reliable image matching, and makes real-time processing possible. Corner points play a very important role in computer vision fields such as 3D scene reconstruction, motion estimation, object tracking, object recognition, ...

Claims

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Application Information

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IPC IPC(8): H04M1/24G06K9/62G06K9/40G01N21/958G01N21/88
CPCH04M1/24G01N21/8851G01N21/958G06V10/30G06F18/22
Inventor 宋明黎沈红佳高鑫邱画谋
Owner HUIZHOU XUXIN PRECISION ELECTRONICS EQUIP
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