边缘模糊检测 [英] Blurry edge detection

问题描述

我对图像处理和识别的背景知识很少.我正在尝试检测诸如肖像之类的灰度图像上的主要边缘/灰度过渡.问题在于，某些部分的边缘模糊(因为聚焦).我正在使用具有多个阈值的Canny边缘检测器，但无法检测到这些边缘(下巴，衣服，耳朵，脸部...)

I have little background knowledge of image processing and recognition. I am trying to detect principal edges/grayscale transitions on a grayscale image such as a portrait. The problem is that on some parts, the edge is blurred (because of focus). I am using Canny edge detector with multiple thresholds, but I can never detect those edges (chin, clothes, ears, side of the face, ...)

原始图片:这就是我得到的结果:胡须，锋利的边缘这就是我感兴趣的功能:主要灰色区域之间的过渡

Original image: This is the result I am getting: beard, sharp edges This is what features I'm interested in: transitions between the main gray areas

边缘检测是正确的工具吗?谢谢！

Is edge detection the right tool for this? Thanks!

更新:使用Deriche过滤并将边缘检测之前的图像大小减半(孔径为7)，使它的工作非常接近我想要的.

UPDATE: Using Deriche filtering and halving the size of the image before edge detection (with apertureSize=7), I got it working pretty close to what I want.

推荐答案

使用canny-deriche过滤器，您可以找到:

Using canny-deriche filter you can find :

完整代码为此处

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