发明名称 |
Automatic image cropping |
摘要 |
The present invention describes a method for automatic cropping of images containing regions where intensity levels are uniform and other regions where intensity levels vary considerably. An image to be automatically cropped is scaled down to a grid and divided into non-overlapping blocks. The mean and variance of an intensity level are calculated for each block. Based on the distribution of variances in the blocks, a threshold is selected for the variance. All blocks with a variance higher than this threshold variance are selected as regions of interest. The regions of interest are then cropped to a bounding rectangle. <IMAGE> <IMAGE> <IMAGE> <IMAGE> |
申请公布号 |
EP0824246(A3) |
申请公布日期 |
2002.06.19 |
申请号 |
EP19970305609 |
申请日期 |
1997.07.25 |
申请人 |
XEROX CORPORATION |
发明人 |
BOLLMAN, JAMES E.;RAO, RAMANA L.;VENABLE, DENNIS L.;ESCHBACH, REINER |
分类号 |
H04N1/387;G06T3/00;G06T7/00 |
主分类号 |
H04N1/387 |
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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