Invention Grant
US09594955B2 Modified wallis filter for improving the local contrast of GIS related images
有权
改进的wallis过滤器，用于改善GIS相关图像的局部对比度
- Patent Title: Modified wallis filter for improving the local contrast of GIS related images
- Patent Title (中): 改进的wallis过滤器，用于改善GIS相关图像的局部对比度
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Application No.: US14272529Application Date: 2014-05-08
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Publication No.: US09594955B2Publication Date: 2017-03-14
- Inventor: Ravi Sankar Dakka , Ravindra N Kondekar , Laxmidhar V Gaopande
- Applicant: Rolta India Ltd
- Applicant Address: IN
- Assignee: ROLTA INDIA LTD
- Current Assignee: ROLTA INDIA LTD
- Current Assignee Address: IN
- Agency: Enterprise IP
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G06T5/00 ; G06K9/52 ; G06K9/46 ; G06T7/40
Abstract:
Disclosed herein is a method and system for performing adaptive local contrast enhancement for an image by using a linear complexity algorithm for Wallis filter. For an input image, the standard deviation and mean are computed for the first pixel in the image. The computed standard deviation and mean of the first pixel are re-used to calculate the standard deviation and mean for the nearest pixels. So, the standard deviation and mean for each pixel in the image are based on the computed standard deviation and mean of at least one other pixel in the image.
Public/Granted literature
- US20150324641A1 MODIFIED WALLIS FILTER FOR IMPROVING THE LOCAL CONTRAST OF GIS RELATED IMAGES Public/Granted day:2015-11-12
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