发明名称 |
IMAGE PROCESS WITH SPATIAL PERIODICITY MEASURE |
摘要 |
An image manipulation process is controlled by a spatial periodicity measure formed for an image or an image block by measuring the sparseness of the two-dimensional spatial frequency spectrum of the image on a scale of zero to unity in which a two-dimensional spatial frequency spectrum having all equal values has a sparseness of zero and in which a two-dimensional spatial frequency spectrum having only one non-zero value has a sparseness of unity. Sparseness may be measured by allocating values of the spectrum to frequency bins and counting the number of bins that contain non-zero values; comparing values of the spectrum with a threshold and counting the number of values that exceed the threshold; or forming a function of the mean-square value and the mean value of the spectrum values. |
申请公布号 |
US2015279041(A1) |
申请公布日期 |
2015.10.01 |
申请号 |
US201514736440 |
申请日期 |
2015.06.11 |
申请人 |
Snell Limited |
发明人 |
Knee Michael James |
分类号 |
G06T7/00;G06T5/40 |
主分类号 |
G06T7/00 |
代理机构 |
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代理人 |
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主权项 |
1. A non-transitory computer-readable medium including instructions configured to cause a computer system to implement a method comprising the steps of:
forming a spatial periodicity measure for at least part of an image; and controlling an image manipulation process in dependence on said spatial periodicity measure; wherein the step of forming a spatial periodicity measure comprises:
measuring the sparseness of the two-dimensional spatial frequency spectrum of the image on a scale of zero to unity in which a two-dimensional spatial frequency spectrum having all equal values has a sparseness of zero and in which a two-dimensional spatial frequency spectrum having only one non-zero value has a sparseness of unity; andderiving a spatial periodicity measure data that is a function of said sparseness of the two-dimensional spatial frequency spectrum. |
地址 |
Reading GB |