OpenCV: draw a white(!) circle in CV_16UC1 mat

Question

I would like to draw a white circle in an matrix of type CV_16UC1. That is basically what I do:

cv::Mat bla => Type CV_16UC1
cv::circle(bla, cv::Point(15, 15), 1, COLOR, 20);

I tried for Color:

cv::Scalar(0,0,0)
cv::Scalar(255,255,255)
UINT_MAX

but everything turns up black... any suggestions?

Answer 1

If I remember correctly that C1 means one channel image. Try to use a color with one demension: cv::Scalar(0xffff)

I use 0xffff because the 16U means 16 (unsigned) bits per channel.