Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In mathematical morphology and digital image processing, TOP-HAT transform is an operation that extracts small elements and details from given images. There exist two types of top-hat transform: The white top-hat transform is defined as the difference between the input image and its opening by some structuring element; The black top-hat transform is defined dually as the difference between the closing and the input image.

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