Method and device for determining illumination intensity for detection and optical detection method and device
A technology of light intensity and optical detection, applied in measurement devices, optical radiation measurement, optics, etc., can solve problems such as false detection, inability to determine light intensity, loss of image details, etc.
Inactive Publication Date: 2016-08-31
BOE TECH GRP CO LTD +1
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from Figure 2a , 2b , 3a and 3b, it can be seen that whether it is reflected illumination or transmitted illumination, when the light intensity is high, the image details will be seriously lost, which will cause false detection
On the other hand, although the image details are more obvious when the light intensity is weak, but from Figure 1a and Figure 1b It can be seen that when the light intensity is weak, there is no peak value, so it is impossible to determine the best light intensity
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[0131] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the method for determining the light intensity for detection provided by the embodiments of the present disclosure will be described in detail below through specific examples.
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The invention relates to a method and device for determining illumination intensity for detection and an optical detection method and device. The method for determining the illumination intensity for detection comprises the steps of obtaining an image photographed by each of at least one imaging component for a sample to be detected under various illumination intensities; calculating gray standard deviation of each of the images obtained under various illumination intensities for each imaging component; according to the gray standard deviation, determining the illumination intensity for detection of each imaging component. The illumination intensity determined through the method is adopted for detecting the object to be detected, and the detection accuracy can be improved..
Description
technical field [0001] Embodiments of the present disclosure relate to the field of automatic optical detection, and in particular, to a method and device for determining the intensity of light used for detection, and an optical detection method and device. Background technique [0002] Automated Optical Inspection (AOI, Automated Optical Inspection) is an effective inspection method for industrial automation. Machine vision is used as the inspection standard technology. It is widely used in LCD / TFT, transistor and PCB industrial processes, and it can be extended to security systems in terms of people's livelihood. . Automatic optical inspection is a common representative method in the industrial process. It uses optical methods to obtain the surface state of the inspection object, and uses image processing to detect defects such as foreign objects or abnormal patterns. Since it is a non-contact inspection, semi-finished products can be inspected in the middle of the proces...
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IPC IPC(8): G02F1/13G01J1/00
CPCG01J1/00G02F1/1309H04N23/60G01N2021/8835G01N21/8806G01N21/00H04N23/80G06T7/0004G06T2207/30121G06T2207/30141G06T2207/30148
Inventor 王旭刘超强习征东刘洋
Owner BOE TECH GRP CO LTD