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ImageTools[Entropy] - compute the entropy of the layers of an image
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Calling Sequence
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Entropy( img, N, opts )
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Parameters
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img
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Image; input image
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N
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(optional) posint; number of buckets per layer
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opts
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(optional) equation(s) of the form option = value; specify options for the Entropy command
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Description
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The Entropy command computes the entropy of each layer of an image.
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The img parameter specifies the image for which the entropy of the layers is computed.
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The optional N parameter specifies the number of buckets per layer. The default is 256, which is usually suitable for images read from 8-bit per pixel per layer image files.
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For a single layer (grayscale) image, the Entropy command returns a single value. For 3 or 4 layer images, a list is returned; the i-th element in the list is the entropy of the i-th layer.
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Options
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If true, set the range to the minimum and maximum values that occur in the image (on all layers). Overrides the range option. The default is false.
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range = numeric .. numeric
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Assigns the range of values that the buckets cover. The default is 0.0 .. 1.0, which corresponds to the the range of values in an unprocessed image.
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Examples
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 ![img := Create(50, 50, [proc (r, c) options operator, arrow; r*c end proc, proc (r, c) options operator, arrow; r+c end proc, proc (r, c) options operator, arrow; evalf(sin((1/25)*Pi*r)) end proc], fit)](/support/helpjp/helpview.aspx?si=3781/file01944/math146.png)
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![[7.36142010230650, 6.36454035065060, 4.64385618950637]](/support/helpjp/helpview.aspx?si=3781/file01944/math156.png)
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Download Help Document
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