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Download Image Processing with LabVIEW and IMAQ Vision
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4. Image Processing 153 Figure 4.2. Histogram and Histograph of an Image Using Look-up Tables (LuT) You know how to adjust brightness and contrast values of your TV set or TV video PC card; the intention is to get a “better” image, what obviously means a better distribution of the gray-level values. This is achieved by a function f (g) (g are the gray-level values), which assigns a new value to each pixel. If we consider Eq. (1.1), then our function f (g) will modify the gray-level values according to
