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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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

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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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[0026] The technical solutions of the present invention will be explained and described clearly and completely in conjunction with the drawings in the present invention.

[0027] The present invention proposes a method for detecting the corner points of a mobile phone screen based on Hough transform template matching, which determines the true position of the screen on a picture of the mobile phone screen that has been taken. figure 1 It is a flowchart of the method of the present invention. Such as figure 1 As shown, the method of the present invention includes the following steps:

[0028] Step 1. The present invention uses the Hough transform. According to the nature of the mobile phone screen picture, the picture needs to be morphologically processed. After the picture is properly corroded, the picture is expanded by the same factor to eliminate interference signals such as random noise in the picture and moiré in the mobile phone screen area. Perform a proper scale reductio...

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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, ...

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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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