range
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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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Size
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An odd integer between 1 and 2*Overscan+1 specifying the size of the square neighborhood in which the difference between the maximum and minimum intensity is calculated. The Overscan setting is defined in ImageWarp Preferences.
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Invert
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A boolean integer specifying if the outcome of the function should be inverted. Must be one of the following values:
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FALSE the direct mode. Edges are presented as bright lines on a dark background.
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TRUE the inverse mode. Edges are presented as dark lines on a bright background.
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Default: FALSE
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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 continuously captures an image and performs phase detection by applying the range filter with the window of size 5.:
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do
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grabIm (0)
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range (0, 1, 5)
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loop while getError()=ERR_OK
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