Anti-glasses reflection machine vision lighting system
A lighting system and machine vision technology, applied in lighting applications, lighting devices, lighting and heating equipment, etc., can solve the problems of visual system failure, rarely consider the surface reflection of the object to be measured, and image quality degradation, and achieve a simple system structure. , Obvious matting effect, easy to install
Inactive Publication Date: 2009-09-30
TSINGHUA UNIV
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At the same time, it can also be seen that the current design of machine vision light sources is mainly to achieve uniform illumination, and rarely consider the reflection of the surface of the measured object
In some working conditions, such as: the visual system is used for the surface quality detection of objects with a high degree of smoothness, and the eye recognition of people wearing glasses, etc., surface reflections will seriously degrade the image quality, and even cause the entire visual system to fail.
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[0012] The machine vision lighting system that the present invention proposes to prevent glasses reflection, its structure is as follows figure 1 As shown, it includes: a first light source 1 , a second light source 2 , a camera 4 , a control circuit 5 , an image acquisition card 6 and a computer 7 . The camera 4, the control circuit 5, the image acquisition card 6 and the computer 7 are arranged in sequence to form an image acquisition channel. The first light source 1 and the second light source 2 are placed on both sides of the camera 4 respectively.
[0013] In the lighting system of the present invention, the first light source 1 and the second light source 2 are fast recovery light sources respectively, and the lighting and extinguishing times of the light sources are less than 40 milliseconds.
[0014] In the lighting system of the present invention, the first light source 1 and the second light source 2 are white light sources with a spectrum of 0.38-0.76 μm, or near-...
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The invention relates to an anti-glasses reflection machine vision lighting system and belongs to the technical field of machine vision. The system comprises a first light source, a second light source, a camera, a control circuit, an image acquisition card and a computer. The camera, the control circuit, the image acquisition card and the computer are arranged sequentially to form an image acquisition channel; and the first light source and the second light source are arranged on the two sides of the camera respectively. Compared with the prior lighting technology, the anti-glasses reflection machine vision lighting system provided by the invention has the advantages of using double light sources instead of the conventional single light source, adopting a pulse lighting mode instead of the conventional continuous lighting mode, solving the reflection problem of glasses by using a fused output method, along with simple system mechanism, easy installation and remarkable light extinction effect.
Description
technical field [0001] The invention relates to a machine vision lighting system for preventing glasses from reflecting light, and belongs to the technical field of machine vision. Background technique [0002] The lighting system is one of the most critical components of the machine vision system. Its main goal is to project light onto the object under test in a suitable way to highlight the contrast of the features under test. Its performance is directly related to the success or failure of the entire system. A good design can improve the resolution of the whole system and simplify the operation of the software. A stable and reliable image processing system is not limited to obtaining temporary high-quality images in the laboratory, but more importantly, it can obtain high-quality, high-contrast images in the actual application field. In order to realize such a stable and reliable image processing system, it is very important to improve the quality of the illumination sou...
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IPC IPC(8): F21S2/00F21V23/00H05B37/02G06K9/20F21W131/403
CPCY02B20/42Y02B20/40
Inventor 成波张伟
Owner TSINGHUA UNIV