04 cvScalar 和 CV_RGB 指定顏色

目的：

cvScalar 和  CV_RGB都是指定顏色

函數介紹：

cvScalar 顏色指定是 BGR

CV_RGB顏色指定是 RGB

參數值：

CvScalar s = cvScalar(double val0, double val1=0, double val2=0, double val3=0);

使用範例：

sample11_cvScalar_顏色BGR

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/opencv.hpp>
#include <iostream>
#include <string.h>
#include <fstream>
using namespace cv;
int main(int argc,char **argv)

 int width,height;
 if(argc<=1)
 
 std::cout<<"Error:Please Load a picture!"<<std::endl;
 return 0;
 

 IplImage *image;
 //建立視窗
 namedWindow("image",CV_WINDOW_AUTOSIZE);

 //讀取圖片
 image=cvLoadImage(argv[1]);
 width=image->width;
 height=image->height;

 // 畫出正方形的外框
 cvRectangle(image,
 cvPoint((width/4),(height/4)),
 cvPoint((width/4)*3,(height/4)*3),
 CV_RGB(255,0,0),3,CV_AA,1);

 cvRectangle(image,
 cvPoint((width/4)*4,(height/4)),
 cvPoint((width/4)*6,(height/4)*3),
 cvScalar(255,0,0),3,CV_AA,1);

 cvShowImage("image",image);
 waitKey(0);

 cvDestroyAllWindows();
 cvReleaseImage(&image);
 system("pause");
 return 0;

 

結果：

補充資料：

Black = cCvScalar::new_object(cvScalar(0x0,0x0,0x0))

Silver = cCvScalar::new_object(cvScalar(0x0c,0x0c,0x0c))

Gray = cCvScalar::new_object(cvScalar(0x80,0x80,0x80))

White = cCvScalar::new_object(cvScalar(0xff,0xff,0xff))

Maroon = cCvScalar::new_object(cvScalar(0x0,0x0,0x80))

Red = cCvScalar::new_object(cvScalar(0x0,0x0,0xff))

Purple = cCvScalar::new_object(cvScalar(0x80,0x0,0x80))

Fuchsia = cCvScalar::new_object(cvScalar(0xff,0x0,0xff))

Green = cCvScalar::new_object(cvScalar(0x0,0x80,0x0))

Lime = cCvScalar::new_object(cvScalar(0x0,0xff,0x0))

Olive = cCvScalar::new_object(cvScalar(0x0,0x80,0x80))

Yellow = cCvScalar::new_object(cvScalar(0x0,0xff,0xff))

Navy = cCvScalar::new_object(cvScalar(0x80,0x0,0x0))

Blue = cCvScalar::new_object(cvScalar(0xff,0x0,0x0))

Teal = cCvScalar::new_object(cvScalar(0x80,0x80,0x0))

Aqua = cCvScalar::new_object(cvScalar(0xff,0xff,0x0))

04 cvScalar 和 CV_RGB 指定顏色