OpenCV SuperResolution OutputArray frame - c++

Question

In the documentation for SuperResolution
The code required to output the nextframe is :
void superres::SuperResolution::nextFrame(OutputArray frame)
The input frame source has to be set with :
void superres::SuperResolution::setInput(const Ptr<FrameSource>& frameSource)
I have a code that takes frames from a video :
#include "opencv2/opencv.hpp"
#include "iostream"
using namespace cv;
using namespace std;
int main(int, char**)
{
VideoCapture cap ( "video1.mp4" ); // open the default camera
if( ! cap.isOpened () ) // check if we succeeded
return -1;
/* Mat edges; */
namedWindow ( "Video" , 1 );
double frnb ( cap.get ( CV_CAP_PROP_FRAME_COUNT ) );
std::cout << "frame count = " << frnb << endl;
for(;;)
{
Mat frame;
double fIdx;
std::cout << "frame index ? ";
std::cin >> fIdx;
if ( fIdx < 0 || fIdx >= frnb ) break;
cap.set ( CV_CAP_PROP_POS_FRAMES , fIdx );
bool success = cap.read(frame);
if ( ! success )
{
cout << "Cannot read frame " << endl;
break;
}
/* cap >> frame; // get a new frame from camera */
imshow("Video", frame);
if ( waitKey (0) == 27 ) break;
}
// the camera will be deinitialized automatically in VideoCapture destructor
return 0;
}
Given this I can use the frame variable as the parameter for the setInput method, but how can I initialize the OutputArray frame needed to generate the output ?

Answer 1

I think you cannot use frame as the parameter for the setInput and you don't need to initalize the OutputArray frame.
Check this example out:
FrameSource is created like this:
121. frameSource = createFrameSource_Video(inputVideoName);
And then the outputArray frame is used like this:
142. Mat result; // no intialization, just declaration
144. MEASURE_TIME(superRes->nextFrame(result));