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BUILT-IN MATHEMATICA SYMBOL
BottomHatTransform[image, ker]
gives the morphological bottom-hat transform of image with respect to structuring element ker.
BottomHatTransform[image, r]
gives the bottom-hat transform with respect to a range-r square.
BottomHatTransform[data, ...]
applies a bottom-hat transform to an array of data.
Details
- BottomHatTransform works with binary, grayscale, and other images.
- BottomHatTransform works with 3D as well as 2D images, and also with data arrays of any rank.
- The structuring element ker is a matrix containing
s and 
s. - BottomHatTransform automatically pads structuring elements to have odd dimensions.
- BottomHatTransform[image, r] is equivalent to BottomHatTransform[image, BoxMatrix[r]].
- If multiple image channels are present, BottomHatTransform operates on each of them separately.
- BottomHatTransform preserves regions smaller than the structuring element whose channel values are smaller than their surroundings.
Examplesopen all
Basic Examples (5)
Use bottom-hat transform to highlight the dark spots on a cheetah:
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Bottom-hat transform applied to a color photo:
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Extract small, dark regions from a color image:
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Use a disk-shaped structuring element to extract washers that are smaller than the specified size:
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The bottom-hat transform effectively inverts high-frequency regions:
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New in 7 | Last modified in 9
