发明申请
US20130114912A1 DETECTION AND/OR ENHANCEMENT OF CONTRAST DIFFERENCES IN DIGITAL IMAGE DATA
有权
检测和/或增强数字图像数据中的对比差异
- 专利标题: DETECTION AND/OR ENHANCEMENT OF CONTRAST DIFFERENCES IN DIGITAL IMAGE DATA
- 专利标题(中): 检测和/或增强数字图像数据中的对比差异
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申请号: US13643690申请日: 2010-04-26
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公开(公告)号: US20130114912A1公开(公告)日: 2013-05-09
- 发明人: Johan Schirris , Sasa Cvetkovic
- 申请人: Johan Schirris , Sasa Cvetkovic
- 申请人地址: DE Stuttgart
- 专利权人: ROBERT BOSCH GMBH
- 当前专利权人: ROBERT BOSCH GMBH
- 当前专利权人地址: DE Stuttgart
- 国际申请: PCT/EP10/55537 WO 20100426
- 主分类号: G06T5/00
- IPC分类号: G06T5/00
摘要:
A method for obtaining and/or enhancing local contrast differences (LD) in digital image input data (in), wherein a local contrast measure (SADap) approximating a two-dimensional sum of absolute difference (SAD) measure is obtained by obtaining a first-dimension sum of absolute difference measure (energyVk(m, n)) representing a sum of absolute difference (SAD) in a first dimension of at least one image region, and obtaining the local contrast measure (SADap) as a second-dimension convoluted first-dimension sum of absolute difference measure by convoluting the first-dimension sum of absolute difference measure (energyVk(m, n)) in a second dimension of the at least one image region, is proposed, wherein the step of obtaining the local contrast measure (SADap) as the second-dimension convoluted first-dimension sum of absolute differences measure further includes an addition step wherein an energy term (Δlpfk(j)) representing a first-order difference on a distance (J) of a low pass filtered signal used in obtaining the first-dimension sum of absolute differences measure (energyVk(m, n)) and in obtaining the second-dimension convoluted first-dimension sum of absolute differences measure is introduced while obtaining the local contrast measure (SADap).