What is Bottom-Hat transformation?

1. What is top hat and bottom-hat transformation?
2. What is bottom-hat?
3. What does top hat filter do?
4. What is Top Hat morphology?

What is top hat and bottom-hat transformation?

The top-hat is used for light objects on a dark background and the bottom-hat – for dark objects on a light background. An important use of top-hat transformation is in correcting the effects of non-uniform illumination.

What is bottom-hat?

Bottom-hat filtering is the equivalent of subtracting the input image from the result of performing a morphological closing operation on the input image. To define the structuring element that the block applies to the image, use the Neighborhood or structuring element parameter.

What does top hat filter do?

Top-hat filtering computes the morphological opening of the image (using imopen ) and then subtracts the result from the original image. J = imtophat( I , nhood ) top-hat filters the image I , where nhood is a matrix of 0 s and 1 s that specifies the structuring element neighborhood.

What is Top Hat morphology?

In mathematical morphology and digital image processing, top-hat transform is an operation that extracts small elements and details from given images.