clahe algorithm (MathWorks Inc)
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MathWorks Inc
clahe algorithm
Clahe Algorithm, supplied by MathWorks Inc, used in various techniques. Bioz Stars score: 96/100, based on 2932 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/clahe+algorithm+in/Image+Processing+Toolbox/pmc07572501-213-7-12
Average 96 stars, based on 2932 article reviews
Clahe Algorithm, supplied by MathWorks Inc, used in various techniques. Bioz Stars score: 96/100, based on 2932 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/clahe+algorithm+in/Image+Processing+Toolbox/pmc07572501-213-7-12
Average 96 stars, based on 2932 article reviews
clahe algorithm - by Bioz Stars,
2026-10
96/100 stars
Images
1) Product Images from "3D histopathology of human tumours by fast clearing and ultramicroscopy"
Article Title: 3D histopathology of human tumours by fast clearing and ultramicroscopy
Journal: Scientific Reports
doi: 10.1038/s41598-020-71737-w
Figure Legend Snippet: Computational improvement of cancer sample recordings. ( a ) Image processing chain for cancer biopsies. The UM image stacks are contrast enhanced by contrast limited histogram equilibration (CLAHE), followed by stripe artifact removal using a matched 2D Fourier transform slope filter and unsharp masking. ( b1 ) Representative slice of an UM data set obtained from a breast cancer biopsy before post-processing. ( b2 ) Same as in ( b1 ) after contrast enhancement using CLAHE. The visibility of information encoded in small brightness differences is clearly enhanced. ( b3 ) Stripe artifacts generated during UM recording have been removed via a matched 2D Fourier domain slope filter. ( b4 ) Finally, the image is slightly sharpened via unsharp-masking to further enhance the visibility of fine details. ( c ) UM recordings often exhibit stripe shaped artefacts originating from light absorbing structures that are persistent to the clearing procedure. By obstructing the light sheet these structures produce visible shadows that can include an angle α with the horizontal image edges depending on the camera orientation. ( d ) To remove the stripe artefact the images are Fourier transformed and multiplied with a filter mask cutting out a pie-slice shaped piece of the spectrum matching the angular direction α of the stipes. After inverse transformation and rescaling a stripe suppressed image is obtained. ( e1 ) Design of the pie shaped filter. The angular direction α of the stripes corresponds to an angle of 90-α in the 2D power spectrum. The angular direction and the shape of the pie slice filter can be optimized in the software by varying α and the distances d 1 , d 2 , w 1 , and w 2 . This allows to match bandwidth and direction sensitivity of the filter in order to find a parameter combination providing best possible stripe suppression at minimal costs of blurring artefacts or ringing. ( e2 ) To reduce ringing artefacts due to a hard frequency cutoffs, the edges of the pie shaped filter exhibit a smooth Gaussian transition profile. All image processing steps were performed using custom-made software written in MATLAB (MathWorks, Germany) and Visual Basic.Net (Microsoft, USA). The programs can be obtained from klaus.becker@twien.ac.at upon reasonable request.
Techniques Used: Generated, Transformation Assay, Software
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