OpenCV KeyPoint:有关角度和八度的信息 [英] OpenCV KeyPoint: information about angle and octave

问题描述

我想了解有关KeyPoints的更多信息，所以谁能告诉我什么是

I want to know more about KeyPoints, so can anyone told me what are

在OpenCV文档中提到角度是计算关键点的方向(如果不适用，则为-1).我无法想象这是什么.因此，有人可以说出这是什么意思还是举个小例子.

In OpenCV docs was mentioned that angle is computed orientation of the keypoint (-1 if not applicable). I can not imagine that what it is about. So Can anyone say me what it means or bring a small example.

在OpenCV文档中提到八度是从中提取关键点的八度(金字塔层).我无法想象这是什么.因此，有人可以说出这是什么意思还是举个小例子.

In OpenCV docs was mentioned that octave is octave (pyramid layer) from which the keypoint has been extracted. I can not imagine that what it is about. So Can anyone say me what it means or bring a small example.

推荐答案

如果您真的想了解基础知识，只需转到基础知识:

If you really want to understand the basics, just go to the basics:

http://www.cs.ubc.ca/~lowe/论文/ijcv04.pdf

这是有关图像特征描述/提取的第一篇也是最具影响力的论文之一.您可能会发现难以忍受，但是它为复杂的问题提供了很好的解释.

It is the first, and one of the most influential papers about image feature description/extraction. You may find it a bit hard to swallow, but it offers a good explanation of a complex problem.

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