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Color and gradient based element positioning method and system

A positioning method and gradient technology, applied in image data processing, instruments, calculations, etc., can solve problems such as insufficient stability

Active Publication Date: 2016-09-28
GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide a component positioning method and system based on color and gradient to solve the problem of insufficient stability of positioning results obtained by existing component positioning methods

Method used

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  • Color and gradient based element positioning method and system
  • Color and gradient based element positioning method and system
  • Color and gradient based element positioning method and system

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0024] see figure 1 Shown is an embodiment of the component positioning method based on color and gradient of the present invention. The component positioning method based on color and gradient in this embodiment includes the following steps:

[0025] Step S101: Acquiring a template image of the component to be tested and an image to be tested that is actually photographed for the component to be tested;

[0026] The component to be tested can be an electronic component on the PCB, such as resistors, inductors, capacitors, etc.; the template image only includes the ima...

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Abstract

The invention relates to a color and gradient based element positioning method and system. The color and gradient based element positioning method comprises the steps of acquiring an HSV image and a gradient magnitude image of a template image and an HSV image and a gradient magnitude image of an image to be tested, respectively replacing a V-channel value of each pixel point in the HSV image of the template image with the gradient magnitude of the corresponding pixel point in the gradient magnitude image of the template image so as to acquire a target template image, further respectively replacing a V-channel value of each pixel point in the HSV image of the image to be tested with the gradient magnitude of the corresponding pixel point in the gradient magnitude image of the image to be tested so as to acquire a target image to be tested, and carrying out template matching by using the target template image and the target image to be tested so as to be able to carry out positioning on an element to be tested in the image to be tested. According to the scheme, gradient information of the image is considered in template matching, so that influences of different illuminations can be effectively reduced, and thus the positioning stability of the electronic element is effectively improved.

Description

technical field [0001] The invention relates to the field of automatic optical inspection, in particular to a component positioning method and system based on color and gradient. Background technique [0002] At present, AOI (Automatic Optic Inspection, automatic optical inspection) system is mostly used for inspection of PCB circuit boards (printed circuit boards). Automatic optical inspection is a necessary part of the industrial production process, and the surface state of finished products is obtained by optical means , using image processing to detect foreign matter or surface blemishes. The fault, omission, and reverse detection of electronic components is a common application in the field of circuit board defect detection. The machine automatically scans the circuit board through the camera to obtain images, extracts partial images of each electronic component, and uses image processing technology to judge the electronic components. Check whether there are errors, om...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T7/0004G06T2207/10004G06T2207/30141G06T7/00
Inventor 林建民
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD