如何排序从顶部到底部的轮廓：opencv的，Android的 [英] How to sort contours from top to bottom : Opencv , Android

问题描述

我已经发现了轮廓，但问题是该findcontours（）返回轮廓以随机顺序像在轮廓（0）它显示从页面的中间部分sontour。我怎么可以垂直对它们进行排序？从上到下，然后从左向右？下面给出我水平连接的组件连接着各个MCQ与他们的选择，然后应用findcontours（图像），现在我想他们，他们应该按顺序检索的进行排序

I have found the contour but the problem is that the findcontours() returns contours in random order like at contour(0) it shows some sontour from middle of the page. How can I sort them vertically? From top to bottom and then left to right? Given the image below I connected the components horizontally and connected every MCQ with their choices and then applied findcontours() and Now I want to sort them in an order that they should be retrieved sequentially

推荐答案

您具备的功能<一个href=\"http://docs.opencv.org/java/org/opencv/imgproc/Imgproc.html#boundingRect%28org.opencv.core.MatOfPoint%29\"相对=nofollow> boundingRect ：有了，你可以找到的点周围的矩形边框的左上点。然后，你可以定义一个排序功能，基于这点对于每个轮廓的位置定购轮廓。

You have the function boundingRect: With that you can find the topleft point of a bounding rectangle around the points. Then you can define a sorting function that orders the contours based on the location of this point for each contour.

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