Basic Knowledge of Vision Sensors
Basic Knowledge of Vision Sensor
What Is a Vision Sensor
Vision sensor is utilized for detecting defective object, measurement size of object, character recognition,sorting objects, etc.
Vision sensor utilize image processing technologies like distinguishing "White or Black", "Bright or Dark", "Difference of the color", etc. detecting difference of these factors.
For example, to detect stain on the white object, the vision sensor checks black area in the field of view and detect it as the stain if the area exceeds threshold of the area.
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Detecting Stain
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Pattern Matching
Main functions of vision sensor are capturing image of the object and check the image comparing with master image and then output the result of the inspection. It has a camera with image sensor e.g. CCD (Charge Coupled Device), CMOS (Complementary Metal Oxide Semiconductor) image sensor that provides digital image data for image processing, for example, pattern matching, measurement, OCR, etc.
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