您可以使用resize
使用最近邻插值INTER_NEAREST
:
Code:
Mat mInput(2, 2, CV_8UC3),mOutput(4, 4, CV_8UC3);
mInput.at<Vec3b>(0,0)= Vec3b(0,14,255);
mInput.at<Vec3b>(0,1)= Vec3b(75,156,255);
mInput.at<Vec3b>(1,0)= Vec3b(45,255,234);
mInput.at<Vec3b>(1,1)= Vec3b(236,141,255);
cout<<mInput<<"\n";
resize(mInput,mOutput,Size(4,4),0,0,INTER_NEAREST);
cout<<mOutput<<"\n";;
Output
[ 0, 14, 255, 75, 156, 255;
45, 255, 234, 236, 141, 255]
[ 0, 14, 255, 0, 14, 255, 75, 156, 255, 75, 156, 255;
0, 14, 255, 0, 14, 255, 75, 156, 255, 75, 156, 255;
45, 255, 234, 45, 255, 234, 236, 141, 255, 236, 141, 255;
45, 255, 234, 45, 255, 234, 236, 141, 255, 236, 141, 255]
Press any key to continue . . .
感谢@wendelbsilva 在评论中指出了这一点。