
Shape preserving local histogram modification
Caselles, Vincent; Lisani, Jose-Luis; Morel, Jean-Michel; Sapiro, Guillermo (1999), Shape preserving local histogram modification, IEEE Transactions on Image Processing, 8, 2, p. 220-230. http://dx.doi.org/10.1109/83.743856
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Article accepté pour publication ou publiéDate
1999Journal name
IEEE Transactions on Image ProcessingVolume
8Number
2Publisher
IEEE
Pages
220-230
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Show full item recordAbstract (EN)
A novel approach for shape preserving contrast enhancement is presented in this paper. Contrast enhancement is achieved by means of a local histogram equalization algorithm which preserves the level-sets of the image. This basic property is violated by common local schemes, thereby introducing spurious objects and modifying the image information. The scheme is based on equalizing the histogram in all the connected components of the image, which are defined based both on the grey-values and spatial relations between pixels in the image, and following mathematical morphology, constitute the basic objects in the scene. We give examples for both grey-value and color images.Subjects / Keywords
Connected components; histogram equalization; level-sets; local operations; mathematical morphologyRelated items
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