c++ - 如何使用带有覆盆子相机模块的opencv c++以彩色模式获取图像

Question

我正在使用带有 opencv 3 gold 和 raspicam-0.1.3 libarrry 的 raspberry pi 2 作为 pi 相机模块我已经测试了下面的代码并且它有效但它为我提供了灰度模式(黑色和白色)的图像但我希望它处于彩色模式(RGB)

代码如下:

#include <ctime>
#include <iostream>
#include <raspicam/raspicam_cv.h>
using namespace std; 

int main ( int argc,char **argv ) {

    time_t timer_begin,timer_end;
    raspicam::RaspiCam_Cv Camera;
    cv::Mat image;
    int nCount=100;
    //set camera params
    Camera.set( CV_CAP_PROP_FORMAT, CV_8UC1 );
    //Open camera
    cout<<"Opening Camera..."<<endl;
    if (!Camera.open()) {cerr<<"Error opening the camera"<<endl;return -1;}
    //Start capture
    cout<<"Capturing "<<nCount<<" frames ...."<<endl;
    time ( &timer_begin );
    for ( int i=0; i<nCount; i++ ) {
        Camera.grab();
        Camera.retrieve ( image);
        if ( i%5==0 )  cout<<"\r captured "<<i<<" images"<<std::flush;
    }
    cout<<"Stop camera..."<<endl;
    Camera.release();
    //show time statistics
    time ( &timer_end ); /* get current time; same as: timer = time(NULL)  */
    double secondsElapsed = difftime ( timer_end,timer_begin );
    cout<< secondsElapsed<<" seconds for "<< nCount<<"  frames : FPS = "<<  ( float ) ( ( float ) ( nCount ) /secondsElapsed ) <<endl;
    //save image 
    cv::imwrite("raspicam_cv_image.jpg",image);
    cout<<"Image saved at raspicam_cv_image.jpg"<<endl;
}

只是注意到我在尝试这里的第一个示例时得到了彩色图像:http://sourceforge.net/projects/raspicam/files/?source=navbar

我所做的是在 imwrite 之前插入 cvtColor(image, cimg, CV_GRAY2RGB); 但这并没有解决我的问题

任何帮助将不胜感激......谢谢

Answer 1

您在这里将相机设置为“灰度模式”:

Camera.set( CV_CAP_PROP_FORMAT, CV_8UC1 );

如果你想要“彩色模式”，你应该这样做:

Camera.set( CV_CAP_PROP_FORMAT, CV_8UC3 );

CV_8UC1 表示每种颜色 1 个字节，即灰度，而 CV_8UC3 表示每种颜色 3 个字节，例如红绿蓝