{"id":2611,"date":"2019-07-12T07:46:22","date_gmt":"2019-07-12T07:46:22","guid":{"rendered":"http:\/\/www.sipotek.net\/?p=2611"},"modified":"2019-07-12T07:46:22","modified_gmt":"2019-07-12T07:46:22","slug":"image-acquisition-and-processing-optical-camera-and-ccd-camera-used-in-industrial-machine-vision-inspection-technology","status":"publish","type":"post","link":"https:\/\/www.sipotek.net\/image-acquisition-and-processing-optical-camera-and-ccd-camera-used-in-industrial-machine-vision-inspection-technology\/","title":{"rendered":"Image Acquisition and Processing, Optical Camera and CCD Camera Used in Industrial Machine Vision Inspection Technology"},"content":{"rendered":"

We already know that machine vision<\/a> is the technology and methods used to provide imaging-based automatic inspection<\/a> and analysis for such applications as automatic inspection, process control, and robot guidance, usually in industry.\u00a0What\u2019s inside the machine vision?<\/p>\n

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  1. Image acquisition technology<\/a>, the basis of machine vision<\/li>\n<\/ol>\n

    The image acquisition\u00a0part is generally composed of the light source, the lens , the digital camera and an image capture card. The acquisition process can be simply described as the situation that with enough illumination of the light source, the digital camera captures the target and transmits it into an image signal, and finally transmits it to the image processing part through the image capture card. When designing the image acquisition part, there are many issues to consider, mainly about digital cameras, image acquisition cards, and light sources.<\/p>\n

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    (1) Light source illumination<\/p>\n

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    Lighting is an important factor affecting the input of the machine vision system, which directly affects the quality and application effect of the input data. So far, there is no machine vision lighting device that can be used for a variety of applications. Therefore, in practical applications, it is necessary to select a corresponding lighting device for the application to meet specific needs.<\/p>\n

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    The illumination system can be divided into: backlight, forward illumination, structured light and stroboscopic illumination according to its illumination method. Wherein, the back illumination means that the object to be tested is placed between the light source and the camera to improve the contrast of the image. The forward illumination is that the light source and the camera are located on the same side of the object to be tested, which has the advantage of being easy to install. The structured light illumination projects a grating or a line light source onto the object to be measured, and demodulates the three-dimensional information of the object to be measured according to the distortion generated thereby. The stroboscopic illumination is to illuminate a high-frequency light pulse onto an object, and the camera captures the same requirements as the light source.<\/p>\n

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