本文介绍了如何排序点的矢量基于Y轴?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一组坐标,例如:
10,40; 9,27; 5.68; 7.55; 8,15;
10,40; 9,27; 5,68; 7,55; 8,15;
我如何排序这些坐标不失分选Y轴的正确的X轴。
How do I sort those coordinates without losing the correct X-Axis of the sorted Y-Axis.
从上面我要的坐标进行排序,以便正确的输出将是例如:
From the example above I want to sort the coordinates so the correct output will be:
8.15; 9,27; 10,40; 7.55; 5.68。
8,15; 9,27; 10,40; 7,55; 5,68.
任何建议将大大AP preciated。谢谢你。
Any suggestion will be greatly appreciated.Thank you.
推荐答案
#include "opencv2/core/core.hpp"
#include <algorithm> // std::sort
// This defines a binary predicate that,
// taking two values of the same type of those
// contained in the list, returns true if the first
// argument goes before the second argument
struct myclass {
bool operator() (cv::Point pt1, cv::Point pt2) { return (pt1.y < pt2.y);}
} myobject;
int main () {
// input data
std::vector<cv::Point> pts(5);
pts[0] = Point(10,40);
pts[1] = Point(9,27);
pts[2] = Point(5,68);
pts[3] = Point(7,55);
pts[4] = Point(8,15);
// sort vector using myobject as comparator
std::sort(pts.begin(), pts.end(), myobject);
}
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