Basic Knowledge of Vision Sensors

Image Processing

In case of monochrome picture, any color will be shown in a level from black to white (gray scale). Binalization is distinguishing colors to black or white separate by a threshold. Following example shows binarization of the gray scale (0 to 255) gradation by the threshold at the level 128.

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Binalizing turns original image into 2 level image (black or white when it's monochrome binalizing) though, gray scaling turns original image into multiple level image e.g. 256, 1024, 64 level. It's used not only for monochrome image but also any other single color image. Multiple level of gradation helps machine vision to detect things more precisely.

Pattern searching is searching image shape close to the stored image as search model in the captured image.
It provides correlation level, how much the image is resemblant to the search model, and coordinate of the image.

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