itk Get Image Region Methods

最新推荐文章于 2022-02-03 00:33:59 发布

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本文详细解释了图像处理中三个关键区域的概念：最大可能区域、缓冲区和请求区域。最大可能区域指整个图像的大小；缓冲区是当前加载在内存中的图像部分；请求区域则是流水线在执行时刻从过滤器请求的部分。作者建议编写过滤器时只生成请求区域，并使用缓冲区进行像素遍历。对于整个图像几何特征的计算，则应使用最大可能区域。

* LargestPossibleRegion is the total size of the image

* BufferedRegion is the portion of the image that is
                  currently loaded in memory
* RequestedRegion is the portion that the pipeline
                  request from a filter at the moment
                  of execution.


If you are writing a filter, you should only generate the
RequestedRegion.

If you are planning to visit pixels with Image Iterators you should use
*at most* the BufferedRegion

If you are computing features from the entire image geometry, then you
should use the LargestPossibleRegion.