Outer rectangle boundary: boundingRect() function #include <opencv2/opencv.hpp> #include <iostream> #include <opencv2/highgui/highgui.hpp> #include <opencv2/imgproc/imgproc.hpp> using namespace std; using namespace cv; #include <iostream> #include <fstream> using namespace cv; //Contains the cv namespace #include <opencv2/core/core.hpp> int main() {<!– –> //Initialize variables and random values Mat image(600, 600, CV_8UC3); RNG & rng = theRNG(); //Loop, press the ESC, Q, […]
Tag: polygon
Polygon zkEVM recursive proof technical documentation (5) – Appendix: Implementing proof composition with SNARKjs and PIL-STARK
Previous blogs include: Polygon zkEVM recursive proof technical documentation (1) [mainly describes the combination, recursion and aggregation of related tools and proofs] Polygon zkEVM recursive proof technical documentation (2) – Polygon zkEVM architecture design Polygon zkEVM recursive proof technical documentation (3) – code compilation and operation Polygon zkEVM recursive proof technical documentation (4)–C12 PIL Description […]
[Transfer] [Mathematics] Determine whether a point is inside a polygon
“Determining whether a point is in a polygon”, I thought it was a very difficult problem at first, but after searching on Google, I found that it is actually quite simple. The algorithm used is called “Ray-casting Algorithm”, which in Chinese should be called “Ray Casting Algorithm” , here is the Wikipedia description: [Wikipedia] Simply […]
Geometric Shapes POJ – 3449 (Multiple polygons intersect)
Geometric Shapes POJ – 3449 Question link: https://vjudge.net/problem/POJ-3449 Question meaning: I will give you many pictures. Each picture has many shapes, including triangles (given the coordinates of three points), squares (given the coordinates of two diagonal points), rectangles (given the coordinates of three points), and line segments (given the coordinates of three points). Two point […]
Python implementation of approximating the maximum rectangle in the horizontal direction within a polygon
Reference Implementation of the algorithm for finding the maximum rectangle in the horizontal direction inside any polygon_nullpo_’s blog The original text was written in groovy code, which is not easy to understand. Here I changed the main logic to the python version, and the effect was ok after testing. code show as below: ) import […]
OpenCV contour approximation-polygon fitting, bounding rectangle and bounding circle
Introduction Contour Approximation refers to approximating or fitting the contour to obtain an approximate contour. In image processing, contours represent the boundaries of objects in an image, so contour approximation can be used to describe and identify the shape of objects. Polygon fitting Polygon fitting (Approximating Polygons) is to approximate the outline into a polygon […]
[AMAP] Overlay/Draw points/Draw polylines/Draw polygons/Draw rectangles/Draw circles
Official example https://lbs.amap.com/demo/javascript-api/example/mouse-operate-map/mouse-draw-overlayers <!doctype html> <html lang=”en”> <head> <meta charset=”utf-8″> <meta http-equiv=”X-UA-Compatible” content=”chrome=1″> <meta name=”viewport” content=”initial-scale=1.0, user-scalable=no, width=device-width”> <link rel=”stylesheet” href=”https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css” type=”text/css”> <style> html,body,#container{<!– –> height: 100% } .input-item{<!– –> height: 2.2rem; } .btn{<!– –> width: 6rem; margin: 0 1rem 0 2rem; } .input-text{<!– –> width: 4rem; margin-right:1rem; } </style> <title>Mouse tool drawing</title> </head> <body> […]
P4529 [SCOI2003] Cut polygon
Go to Luogu to read my blog I feel that the difficulty of this question is all in the details of calculation geometry, so I adjusted QWQ for a few days. Ideas observed p p p is the largest and only 8 8 8. As a konjac, I immediately thought of brute force search. Each […]
Based on echarts, polygons are drawn in the rectangular coordinate system; colors are randomly generated; show-overflow-tooltip style is modified; formatting time; websocket is used; checkbox view is not updated when used in el-table
Based on echarts, draw polygons in the rectangular coordinate system; randomly generate colors; modify the show-overflow-tooltip style 1. Draw polygons in the rectangular coordinate system based on echarts 1.1Introduce echarts dependency into the project 1.2Introduce echarts into the page 1.3html code 1.4js code 1.5 Optimization, add fill style js code 2. Randomly generate colors 2.1 […]
Java determines whether the coordinates are within a certain area (circle, polygon)
import java.awt.geom.Point2D; import java.util.ArrayList; import java.util.List; public class regionUtil { private static double EARTH_RADIUS = 6378137; //private static double EARTH_SEA = 1.852; nautical miles private static double rad(double d) { return d * Math.PI / 180.0; } /** * Determine whether it is within the polygon area * * @param pointLon The abscissa coordinate and […]