OpenCV - 访问沿曲线/路径的像素 [英] OpenCV - Access to pixels along the curve/path

问题描述

有什么方法可以访问OpenCV中指定曲线/路径的像素？

is there any way to access pixels along the specified curve/path in OpenCV?

我找到了LineIterator：
http://opencv.willowgarage.com/documentation/cpp/core_drawing_functions.html?highlight=lineiterator #LineIterator
，但它仅限于行。我想找到类似于LineIterator的东西，但是使用圆，因为我需要读取沿着圆圈的像素，或椭圆。

I've found LineIterator: http://opencv.willowgarage.com/documentation/cpp/core_drawing_functions.html?highlight=lineiterator#LineIterator but it's limited to lines. I would like to find something similar to LineIterator, but working with circles, since I need to read the pixels along the circle, or ellipse.

推荐答案

它不是内建于opencv，但您可以使用 http://en.wikipedia.org/wiki/Midpoint_circle_algorithm 的圈子，文章还提到了一个论文，描述延伸到椭圆。

It is not builtin to opencv, but you can use http://en.wikipedia.org/wiki/Midpoint_circle_algorithm for circles, the article also mentions a paper that describes an extention to ellipses.

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