一、

因为项目须要，原来用GDI做的画线的功能。新的项目中考虑到垮平台的问题。打算用openCV来实现。故此做个效率对照。

二、

2点做一条线，来測试效率。

用了相同的画板大小---256*256的大小，函数通过參数输入。用GetTickCount来实现计时功能。

三、

GDI的主要循代码例如以下：

void  show_line(int line_num,int point_num)

{

	ULONAG start_time = get_tick_count();

	VMGdiPolygon* test_polygon = new VMGdiPolygon();

	int width = 256;

	int height = 256;

	test_polygon->VMIsCleanCloth();

	test_polygon->VMGdiInitBuf(width,height);

	COLORREF color = 0x0000FF;

	test_polygon->VMGdiSetPenColor(color);

	test_polygon->VMGdiSetPenWidth(2);

	int rangle = width;

	int line_count = line_num;

	for (int i = 0; i < line_count;i++)

	{

		for (int j = 0; j<point_num;j++)

		{

			int x_1 = random_fun(rangle);

			int y_1 = random_fun(rangle);

			int x_2 = random_fun(rangle);

			int y_2 = random_fun(rangle);			

			double  pt_0[3] = {x_1,y_1,0};

			double  pt_2[3] = {x_2,y_2,0};

			test_polygon->VMGdiLine(pt_0,pt_2);

		}

		//test_polygon->VMGdiLine(data,point_num,false);

	}

	ULONAG end_time = get_tick_count();

	cout<<"start time"<<start_time<<"--->end time:"<<end_time<<endl;

	cout<<"the number of "<<line_count<<"  lines "<<"has "<<point_num<<" 个数"<<" takes "<<end_time-start_time<<"ms "<<endl;

	test_polygon->VMGdiGetbitmap("D:\\001.bmp");

}

OpenCV的測试循环代码为：

void test_line(int width,int height,int line_count,int point_num,int line_width)

{

	ULONAG start_time = get_tick_count();

	int pic_width = width;

	int pic_height = height;

	Mat picture(pic_width,pic_height,CV_8UC4,Scalar(255,255,255));

	int rangle = width;

	for (int i = 0; i < line_count;i++)

	{

		for (int j = 0; j<point_num;j++)

		{

			int x_1 = random_fun(rangle);

			int y_1 = random_fun(rangle);

			int x_2 = random_fun(rangle);

			int y_2 = random_fun(rangle);

			//画线

			Point a = Point (x_1,y_1);

			Point center = Point(x_2,y_2);

			//cout<<x_1<<"  "<<y_1<<endl;

			//參数为：承载的图像、起始点、结束点、颜色、粗细、线型

			line(picture,a,center,Scalar(255,0,0),line_width,8);

		}

	}

	ULONAG end_time = get_tick_count();

	cout<<"the number of "<<line_count<<"  lines "<<" takes "<<end_time-start_time<<"ms "<<endl;

	imshow("底板",picture);

	show_info(picture);

}

四、

调用过程有在main函数中设计线的条数和每条线点的格式。

时间对照：

生成的图表为：

结果对照：opencv的画线效率和GDI在1000个点的处理效率是一致的，用gettickcount使用时间的忽略不计的。

而在总体效率比較中，非常明显opencv的画线效率更高。

五、

两种情况均保存成bmp格式图像。

效果对照：

GDI效果：

OpenCV效果：

watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvY2FydHpoYW5n/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt="">

放大效果：

GDI效果：

OpenCV放大：

眼下看来。opencv 处理效果较好点。

六、

两个main函数的代码

GDI main函数代码：

#include "VMGdiPolygon.h"

using namespace VRMap;

#include <iostream>

using namespace std;

#include "rw_timer.h"

int  random_fun(int rangle);

void show_2_point_line();

void  show_line(int line_num,int point_num,int line_width);

//void  show_polygonline(int line_num,int point_num,int line_width);

void main()

{

	//show_2_point_line();

	int line_number = 1;

	int point_numb = 10;

	int line_width = 2;

	show_line(line_number,point_numb);

	//show_polygonline(line_number,point_numb,line_width);

	system("pause");

	return;

}

int  random_fun(int rangle)

{

	int seed(0);

	int result = rand()%rangle;

	return result;

}

void show_2_point_line()

{

	VMGdiPolygon* test_polygon = new VMGdiPolygon();

	int width = 256;

	int height = 256;

	test_polygon->VMIsCleanCloth();

	test_polygon->VMGdiInitBuf(width,height);

	double  pt_0[3] = {0,0,0};

	double  pt_2[3] = {20,20,0};

	COLORREF color = 0xFFFF00;

	test_polygon->VMGdiSetPenColor(color);

	test_polygon->VMGdiSetPenWidth(2);

	test_polygon->VMGdiLine(pt_0,pt_2);

	test_polygon->VMGdiGetbitmap("D:\\001.bmp");

}

void  show_line(int line_num,int point_num)

{

	ULONAG start_time = get_tick_count();

	VMGdiPolygon* test_polygon = new VMGdiPolygon();

	int width = 256;

	int height = 256;

	test_polygon->VMIsCleanCloth();

	test_polygon->VMGdiInitBuf(width,height);

	COLORREF color = 0x0000FF;

	test_polygon->VMGdiSetPenColor(color);

	test_polygon->VMGdiSetPenWidth(2);

	int rangle = width;

	int line_count = line_num;

	for (int i = 0; i < line_count;i++)

	{

		for (int j = 0; j<point_num;j++)

		{

			int x_1 = random_fun(rangle);

			int y_1 = random_fun(rangle);

			int x_2 = random_fun(rangle);

			int y_2 = random_fun(rangle);			

			double  pt_0[3] = {x_1,y_1,0};

			double  pt_2[3] = {x_2,y_2,0};

			test_polygon->VMGdiLine(pt_0,pt_2);

		}

		//test_polygon->VMGdiLine(data,point_num,false);

	}

	ULONAG end_time = get_tick_count();

	cout<<"start time"<<start_time<<"--->end time:"<<end_time<<endl;

	cout<<"the number of "<<line_count<<"  lines "<<"has "<<point_num<<" 个数"<<" takes "<<end_time-start_time<<"ms "<<endl;

	test_polygon->VMGdiGetbitmap("D:\\001.bmp");

}

openCV的main函数代码：

#include <stdio.h>

#include <stdlib.h>

#include <time.h>

using namespace std;

#include "rw_timer.h"

//

////

#pragma comment(lib,"opencv_ml249d.lib")

#pragma comment(lib,"opencv_calib3d249d.lib")

#pragma comment(lib,"opencv_contrib249d.lib")

#pragma comment(lib,"opencv_core249d.lib")

#pragma comment(lib,"opencv_features2d249d.lib")

#pragma comment(lib,"opencv_flann249d.lib")

#pragma comment(lib,"opencv_gpu249d.lib")

#pragma comment(lib,"opencv_highgui249d.lib")

#pragma comment(lib,"opencv_imgproc249d.lib")

#pragma comment(lib,"opencv_legacy249d.lib")

#pragma comment(lib,"opencv_objdetect249d.lib")

#pragma comment(lib,"opencv_ts249d.lib")

#pragma comment(lib,"opencv_video249d.lib")

#pragma comment(lib,"opencv_nonfree249d.lib")

#pragma comment(lib,"opencv_ocl249d.lib")

#pragma comment(lib,"opencv_photo249d.lib")

#pragma comment(lib,"opencv_stitching249d.lib")

#pragma comment(lib,"opencv_superres249d.lib")

#pragma comment(lib,"opencv_videostab249d.lib")

#pragma comment(lib,"opencv_objdetect249.lib")

#pragma comment(lib,"opencv_ts249.lib")

#pragma comment(lib,"opencv_video249.lib")

#pragma comment(lib,"opencv_nonfree249.lib")

#pragma comment(lib,"opencv_ocl249.lib")

#pragma comment(lib,"opencv_photo249.lib")

#pragma comment(lib,"opencv_stitching249.lib")

#pragma comment(lib,"opencv_superres249.lib")

#pragma comment(lib,"opencv_videostab249.lib")

#pragma comment(lib,"opencv_calib3d249.lib")

#pragma comment(lib,"opencv_contrib249.lib")

#pragma comment(lib,"opencv_core249.lib")

#pragma comment(lib,"opencv_features2d249.lib")

#pragma comment(lib,"opencv_flann249.lib")

#pragma comment(lib,"opencv_gpu249.lib")

#pragma comment(lib,"opencv_highgui249.lib")

#pragma comment(lib,"opencv_imgproc249.lib")

#pragma comment(lib,"opencv_legacy249.lib")

#pragma comment(lib,"opencv_ml249.lib")

#include<iostream>

#include <opencv2/core/core.hpp>

#include <opencv2/highgui/highgui.hpp>

using namespace cv;

int  random_fun(int rangle);

void show_info(Mat picture);

void test_line(int width,int height,int line_count,int point_num,int line_width);

void test_polyline(int width,int height,int line_count,int point_num,int line_width);

int main()

{

	int width = 256;

	int height = 256;

	int line_count = 100;

	int point_num = 1000;

	int line_width = 1;

	test_line(width,height,line_count,point_num,line_width);

	//

	//test_polyline(width,height,line_count,100,line_width);

	// 等待6000 ms后窗体自己主动关闭

	waitKey(12000);

}

void show_info(Mat picture)

{

	if (picture.data == NULL){

		return;

	}

	//IplImage* test_img = cvSaveImage()

	int channels = picture.channels();

	int rows = picture.rows;

	int cols = picture.cols;

	uchar* data = picture.data;

	cout<<"chanels:"<<channels<<" rows:" <<rows<<" cols:"<<cols<<endl;

}

void test_line(int width,int height,int line_count,int point_num,int line_width)

{

	ULONAG start_time = get_tick_count();

	int pic_width = width;

	int pic_height = height;

	Mat picture(pic_width,pic_height,CV_8UC4,Scalar(255,255,255));

	int rangle = width;

	for (int i = 0; i < line_count;i++)

	{

		for (int j = 0; j<point_num;j++)

		{

			int x_1 = random_fun(rangle);

			int y_1 = random_fun(rangle);

			int x_2 = random_fun(rangle);

			int y_2 = random_fun(rangle);

			//画线

			Point a = Point (x_1,y_1);

			Point center = Point(x_2,y_2);

			//cout<<x_1<<"  "<<y_1<<endl;

			//參数为：承载的图像、起始点、结束点、颜色、粗细、线型

			line(picture,a,center,Scalar(255,0,0),line_width,8);

		}

	}

	ULONAG end_time = get_tick_count();

	cout<<"the number of "<<line_count<<"  lines "<<" takes "<<end_time-start_time<<"ms "<<endl;

	imshow("底板",picture);

	show_info(picture);

}

// 读入一张图片（游戏原画）

//Mat img=imread("pic.jpg");

//// 创建一个名为 "游戏原画"窗体

//cvNamedWindow("游戏原画");

//// 在窗体中显示游戏原画

//imshow("游戏原画",img);

int  random_fun(int rangle)

{

	int seed(0);

	//srand( (unsigned)time( NULL ) );

	int result = rand()%rangle;

	return result;

}

void test_polyline(int width,int height,int line_count,int point_num,int line_width)

{

	ULONAG start_time = get_tick_count();

	int pic_width = width;

	int pic_height = height;

	Mat picture(pic_width,pic_height,CV_8UC4,Scalar(255,255,255));	

	line_count = 1;

	int rangle = width;

	Point** test_points = new Point*[line_count];

	int *npts = new int[line_count];

	for (int j = 0;j < line_count;j++)

	{

		Point rook_points[1][100];

		for (int k =0;k<100;k++)

		{

			int x = random_fun(rangle);

			int y = random_fun(rangle);

			rook_points[0][j] = Point( x,y);

		}

		const Point* ppt[1] = { rook_points[0] };

		int npt[] = { 100 };

		polylines(picture,ppt,npt,1,1,CV_RGB(0,255,0),2,8,0);

	}

	imshow("底板",picture);

	//

	//for (int j = 0;j < line_count;j++)

	//{

	//	delete []test_points[j];

	//	test_points[j] = NULL;

	//}

	//delete []test_points;

	//test_points = NULL;

	ULONAG end_time = get_tick_count();

	cout<<"the number of "<<line_count<<"  lines "<<" takes "<<end_time-start_time<<"ms "<<endl;

	show_info(picture);

}

当然使用须要opencv的各种库的配置。opencv的下载和使用。可參考浅墨的http://blog.csdn.net/poem_qianmo/article/details/20911629

opencv教程和配置设置等博客。

源代码免费下载地址：GDI測试代码

OPENCV的画线測试代码

-------------THE END--------------

若有问题，请指教。

openCV 和GDI画线效率对照的更多相关文章

  1. openCV 和GDI画线效率对比

    一. 由于项目需要,原来用GDI做的画线的功能,新的项目中考虑到垮平台的问题,打算用openCV来实现,故此做个效率对比. 二. 2点做一条线,来测试效率. 用了同样的画板大小---256*256的大 ...

  2. win32画线考虑去锯齿

    整理日: 2015年2月16日 这几天一直在研究win32 SDk下画线去锯齿,之前一直用的QT的画线接口函数,里面有去锯齿的效果,可是突然项目要求不能用QT的只能用win32 SDK下的GDI画线接 ...

  3. GDI+学习之------ 画线、区域填充、写字

    <精通GDI编程>里的代码.在学习过程中对它加以总结,以防以后用到,全部代码都是在MFC 单文档中实现的,写在View::OnDraw(CDC */*pDC*/)中 画线/边框(Pen) ...

  4. Android中Path类的lineTo方法和quadTo方法画线的区别

    转载:http://blog.csdn.net/stevenhu_223/article/details/9229337 当我们需要在屏幕上形成画线时,Path类的应用是必不可少的,而Path类的li ...

  5. C#使用 DirectX SDK 9做视频播放器 并在视频画线添加文字 VMR9

    视频图像处理系列 索引 VS2013下测试通过. 在百度中搜索关键字“DirectX SDk”,或者进入微软官网https://www.microsoft.com/en-us/download/det ...

  6. WPF画线问题，几千条以后就有明显的延迟了。

      我现在是这么画的,class A { private GeometryGroup _lines; private Path _path; public A() {    _path.Data = ...

  7. 用GDI+画验证码

    1.新建一个窗体应用程序,在上面拖一个pictureBox对象,为其添加单击事件 2.创建GDI对象.产生随机数画入图片中.画线条.最后将图片到pictureBox中,代码如下: private vo ...

  8. MFC画线功能总结

    本文仅用于学习交流,商业用途请支持正版!转载请注明:http://www.cnblogs.com/mxbs/p/6216464.html MFC画线功能要点有二:其一,鼠标按下时记录初始位置为线的起始 ...

  9. MFC消息映射机制以及画线功能实现

    ---此仅供用于学习交流,切勿用于商业用途,转载请注明http://www.cnblogs.com/mxbs/p/6213404.html. 利用VS2010创建一个单文档标准MFC工程,工程名为Dr ...

随机推荐

  1. [arc076f]Exhausted? - 贪心

    题意: 给你m个椅子可以坐人,初始坐标为正整数1~m,有n个人,每个人希望坐的位置$\leq L_i$或者$\geq R_i$,可以添加若干个椅子在任意的实数位置,求最少要添加多少椅子使得所有人都有位 ...

  2. HDU-3746 Cyclic Nacklace 字符串匹配 KMP算法 求最小循环节

    题目链接:https://cn.vjudge.net/problem/HDU-3746 题意 给一串珠子,我们可以在珠子的最右端或最左端加一些珠子 问做一条包含循环珠子的项链,最少还需要多少珠子 思路 ...

  3. 【jQuery01】添加添加div

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/ ...

  4. Rancher介绍安装以及对docker的管理

    原文:Rancher介绍安装以及对docker的管理 一.简介 Rancher是一个开源的企业级全栈化容器部署及管理平台.Rancher为容器提供一揽子基础架构服务:CNI兼容的网络服务.存储服务.主 ...

  5. Java学习书目

    Java学习书目 拜读了:http://www.importnew.com/26932.html#comment-636554

  6. MapReduce 的类型与格式【编写最简单的mapreduce】(1)

    hadoop mapreduce 中的map 和reduce 函数遵循下面的形式 map: (K1, V1) → list(K2, V2) reduce: (K2, list(V2)) → list( ...

  7. java webproject中logback换配置文件的路径

    本人小站点:   http://51kxd.com/  欢迎大家不开心的时候訪问訪问,调节一下心情 web.xml中配置: <!-- windows  logback.xml文件跟web容器(比 ...

  8. 8、java高级面向对象-重载、构造器重载、初始化块、this、super、对象构造和初始化分析、覆盖、toString

    1.方法的重载(overload) 同一个类中同时存在一个以上的同名函数,参数个数或类型不同或顺序不同,称为方法的重载. 和返回值无关! 构造器重载:非默认构造器和默认构造器其实就是方法的重载. 2. ...

  9. mongodb官网文档阅读笔记：与写性能相关的几个因素

    Indexes 和全部db一样,索引肯定都会引起写性能的下降,mongodb也没啥特别的,相对索引对读性能的提示,这些消耗通常是能够接受的,所以该加入的索引还是要加入.当然须要慎重一些.扯点远的,以前 ...

  10. hibernate动态表名映射--仅仅有想不到，没有做不到

    近期的一个项目有一个需求,有N个考核单位,要对每一个考核单位生成一张考核情况表.这样做的目的是横切数据库,这这个需求的实现中,我的组员遇到了一个技术问题,我将我的解决的方法和整个思考过程与大家分享, ...