BUILT-IN MATHEMATICA SYMBOL

TopHatTransform

TopHatTransform[image, ker]
gives the morphological top-hat transform of image with respect to structuring element ker.

TopHatTransform[image, r]
gives the top-hat transform with respect to a range-r square.

TopHatTransform[data, ...]
applies top-hat transform to an array of data.

DetailsDetails

• TopHatTransform works with binary, grayscale, and other images.
• TopHatTransform 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.
• TopHatTransform automatically pads structuring elements to have odd dimensions.
• TopHatTransform[image, r] is equivalent to TopHatTransform[image, BoxMatrix[r]].
• If multiple image channels are present, TopHatTransform operates on each of them separately.
• TopHatTransform preserves regions smaller than the structuring element whose channel values are larger than their surroundings.

ExamplesExamplesopen allclose all

Basic Examples (4)Basic Examples (4)

Extract thin lines from a multichannel image:

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Remove disks larger than the structuring element:

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Correct uneven illumination and remove the large feature:

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Extract small, bright regions from a color image:

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