我想知道OpenCV函数的src(source)和dst(destination)是否有不同的变量会对处理时间产生影响.我有以下两个功能
做同样的事情.
做同样的事情.
public static Mat getY(Mat m){
Mat mMattemp = new Mat();
Imgproc.cvtColor(m,mMattemp,Imgproc.COLOR_YUV420sp2RGB);
Imgproc.cvtColor(mMattemp,Imgproc.COLOR_RGB2HSV);
Core.inRange(mMattemp,new Scalar(20,100,100),new Scalar(30,255,255),mMattemp);
return mMattemp;
}
与
public static Mat getY(Mat m){
Mat mMattemp_rgb = new Mat();
Mat mMattemp_hsv = new Mat();
Mat mMattemp_ir = new Mat();
Imgproc.cvtColor(m,mMattemp_rgb,Imgproc.COLOR_YUV420sp2RGB);
Imgproc.cvtColor(mMattemp_rgb,mMattemp_hsv,Imgproc.COLOR_RGB2HSV);
Core.inRange(mMattemp_hsv,mMattemp_ir);
return mMattemp_ir;
}
哪两个更好？一个优于另一个的优势是什么？
解决方法
要确切知道,只需将您的getY方法调用夹在OpenCV的内置方法double getTickCount()和double getTickFrequency()之间(需要转换为java)：
//first uniquely name the algorithms to compare (here just getY_TypeA and getY_TypeB)
double durationA = cv::getTickCount();
getY_TypeA(image); // the function to be tested
durationA = cv::getTickCount()-durationA;
durationA /= cv::getTickFrequency(); // the elapsed time in ms
//now call the other method
double durationB = cv::getTickCount();
getY_TypeB(image); // the function to be tested
durationB = cv::getTickCount()-durationB;
durationB /= cv::getTickFrequency(); // the elapsed time in ms
printf("Type A runtime: "+durationA+" Type B runtime: "+durationB);
