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Method for identifying object two-dimensional outlines

A technology of two-dimensional contour and recognition method, which is applied in the direction of measuring devices, instruments, and optical devices, etc., can solve the problems of slow imaging speed of color cameras, and achieve the effects of increasing speed, reducing calculation amount, and improving detection speed and accuracy

Active Publication Date: 2014-04-02
深圳市振华兴科技有限公司
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Problems solved by technology

This method has two main disadvantages: 1. Due to the limitations of the technology itself, the color camera with the same pixel can carry only 1 / 3 of the information of the black and white camera in the final imaging; 2. Due to the need for filtering and interpolation and other complex calculations, the imaging speed of color cameras is usually significantly slower than that of black and white cameras

Method used

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  • Method for identifying object two-dimensional outlines
  • Method for identifying object two-dimensional outlines
  • Method for identifying object two-dimensional outlines

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] As we all know, among all the colors in nature, there are three special colors - red, green and blue. We call them the three primary colors, or the three primary colors. The reason why they are special is that with these three colors, all colors visible to the human eye in nature can be obtained by mixing them in appropriate proportions. These three colors themselves cannot be obtained by mixing other colors. It is equivalent to that they are the basis of colors visible to all eyes in nature, so they are called three primary colors or three primary colors.

[0026] For the three primary colors, it has its characteristics, that is, white can be obtained by mixing these three colors according to a specific ratio, that is to say, white light can be obtained by mixing red, green and blue three-color light according to this ratio, and vice versa. T...

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Abstract

The invention discloses a method for identifying object two-dimensional outlines, and applies to multiple testing fields such as SMT (surface mount technology). The method is characterized in that RGB (red, green and blue) three-color light sources are used for irradiating measured objects respectively; a black-and-white camera is used for sampling respectively to acquire three black-and-white images; the images are combined to acquire reductive color images; each pixel in the color images is respectively compared with matching regions of RGB three-color brightness of the measured objects preset in a computer; if being consistent to one matching region, the pixels are taken as two-dimensional outline data consistent to the measured objects; and all the pixels consistent to the conditions form the entire two-dimensional outline data of the measured objects. The black-and-white camera is adopted to provide a fast photographing speed, so that the entire detecting speed is increased; and the black-and-white images are combined to generate real color images to acquire more data, so that detecting speed and accuracy are both increased remarkably.

Description

technical field [0001] The invention relates to a two-dimensional contour recognition method of an object, which can be applied to printing detection (such as solder paste, pad, silk screen, etc.) in the field of SMT (Surface Mount Technology). The method in the invention is to identify and locate the two-dimensional contour of the measurement target as the accurate basis for the later three-dimensional measurement. Background technique [0002] In the SMT field, the quality of printing such as solder paste, solder pads, and silk screen printing directly affects the use of PCB boards, so printing inspection becomes particularly important. The two-dimensional measurement method of printing inspection can better locate the specific position of the measurement object and prepare for three-dimensional measurement. The two-dimensional measurement method is currently the AOI automatic detection method, which often uses a color camera to restore the true color of each part of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24
Inventor 廖怀宝
Owner 深圳市振华兴科技有限公司
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