Mergedynamicgenerateballswithpngimages

Below code is written in Opencv 3 c++.

class Ball {
public:
    int x, y, dX, dY, radius, r, g, b, colorWeight;
    clock_t ticksLast;
    cv::Scalar color;
    Ball() {
        radius = ( rand() % (MAX_RADIUS - MIN_RADIUS)) + MIN_RADIUS;
        x = rand() % (640 - 2 * radius) + radius;
        y = rand() % (480 - 2 * radius) + radius;
        dX = dY = 0;
        colorWeight = rand() % 3;
        r = (colorWeight==0) ? rand() % 105 + 140 : rand() % 50;
        g = (colorWeight==1) ? rand() % 105 + 140 : rand() % 50;
        b = (colorWeight==2) ? rand() % 105 + 140 : rand() % 50;
        color = cv::Scalar(b,g,r);
        ticksLast = clock();
    }
};

Above code is generating the balls dynamically, but i need PNG images instead of balls.

Through which way i can get this result.

Thanks