equalize
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Input
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An integer between 0 and 116 specifying the input image frame number. A value of 0 represents the DMA memory buffer of the video device. Values in the range of 100-116 correspond to hidden frames.
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Output
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An integer between 1 and 116 specifying the output image frame number. Values in the range of 100-116 correspond to hidden frames.
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Mode
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An enumerated integer that describes the shape of the recalculated cumulative histogram. Must be one of the following values:
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EQ_UNIFORM=0 - the histogram is distributed equally across the intensity scale. This mode produces a high contrast image with the highest possible dynamic range.
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EQ_LOGARITHM=1 - the histogram is concentrated at the low end of the scale. This mode increases the contrast in the light areas of the image.
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EQ_EXPONENT=2 - the histogram is concentrated at the high end of the scale. This mode increases the contrast in the dark areas of the image.
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EQ_BELL=3 - the histogram is concentrated at the center of the intensity scale. This mode increases the contrast in the light and dark areas of the image.
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Default: EQ_UNIFORM
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ERR_OK
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The flag set if successful.
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ERR_FAILED
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The flag set if failed.
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This set of statements demonstrates different modes of the histogram equalization:
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setCurDir("samples")
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loadIm (1,"sample8.iwd")
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equalize (1, 2, EQ_UNIFORM)
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equalize (1, 3, EQ_LOGARITHM)
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equalize (1, 4, EQ_EXPONENT)
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equalize (1, 5, EQ_BELL)
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