发明名称 |
Calculating noise estimates of a digital image using gradient analysis |
摘要 |
A method of estimating the noise in a digital image for use in subsequent image processing, includes receiving a source digital image having a plurality of pixels; selecting a pixel of interest; providing a plurality of orientations for the pixel of interest; using gradient analysis on the source digital image and the plurality of orientations to select the most suitable orientation for estimating noise for the pixel of interest; using the selected orientation in the pixel of interest to determine a noise-free pixel estimate for the pixel of interest; and repeating for other pixels of interest and using the noise-free pixel estimates to calculate a noise characteristic value representing the noise estimate for the source digital image. |
申请公布号 |
US2003215155(A1) |
申请公布日期 |
2003.11.20 |
申请号 |
US20020151623 |
申请日期 |
2002.05.20 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
SERRANO NAVID;GINDELE EDWARD B. |
分类号 |
G06T5/00;G06T5/20;G06T7/00;H04N1/409;H04N5/21;(IPC1-7):G06T5/00 |
主分类号 |
G06T5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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