Image detection method and device
A technology of images and pixels to be detected, applied in the field of image processing, can solve the problems of slow detection speed, inaccurate detection of arcs, low detection accuracy, etc., and achieve the effect of improving efficiency and accuracy
Pending Publication Date: 2020-07-17
WATRIX TECH CORP LTD +1
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[0003] At present, in the method of locating a circular object with a preset radius in the image to be detected, all the circles in the image to be detected are first detected, and then the circular objects satisfying the preset radius condition are selected from the obtained circles, There is a problem of slow detection speed; and when there are multiple results, the optimal result cannot be selected. At the same time, when the circular object with the preset radius includes arc areas with different arc lengths, it cannot be accurately detected to meet the preset requirements. All arcs with radius conditions have the problem of low detection accuracy
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[0044]In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without ...
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The invention provides an image detection method and device. The method comprises the steps: acquiring a to-be-detected image; determining the gradient direction and the gradient value of each pixel point according to the horizontal gradient in the horizontal direction and the vertical gradient in the vertical direction of each pixel point in a to-be-detected image; according to the gradient direction of each pixel point and the preset radius of a to-be-positioned circular object, determining a candidate circle center corresponding to each pixel point; screening out a target circle center fromthe candidate circle centers according to the sum of the gradient values of the pixel points corresponding to the candidate circle centers and the perimeter of the to-be-positioned circular object; and according to the target circle center, positioning an arc area matched with the circular object in the to-be-detected image. According to the embodiment of the invention, the arc area meeting the radius condition can be directly positioned through the sum of the gradient values of the pixel points corresponding to the candidate circle centers and the perimeter of the to-be-positioned circular object, so that the efficiency and precision of a circular positioning algorithm are improved.
Description
technical field [0001] The present application relates to the technical field of image processing, and in particular, to an image detection method and device. Background technique [0002] When performing component inspection, such as checking whether the size of the component meets the requirements, or checking whether the hole-shaped area inside the component meets the requirements, the circle positioning algorithm is generally used. The circle positioning algorithm is also used when screening or sorting components. [0003] At present, in the method of locating a circular object with a preset radius in the image to be detected, all the circles in the image to be detected are first detected, and then the circular objects satisfying the preset radius condition are selected from the obtained circles, There is a problem of slow detection speed; and when there are multiple results, the optimal result cannot be selected. At the same time, when the circular object with the pres...
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CPCG06T7/0004G06T2207/30164
Inventor 黄永祯于仕琪徐栋
Owner WATRIX TECH CORP LTD