image-processingopencv

How to fill OpenCV image with one solid color?

How to fill OpenCV image with one solid color?

Solution

  • Using the OpenCV C API with IplImage* img:

    Use cvSet(): cvSet(img, CV_RGB(redVal,greenVal,blueVal));

    Using the OpenCV C++ API with cv::Mat img, then use either:

    cv::Mat::operator=(const Scalar& s) as in: 

    img = cv::Scalar(redVal,greenVal,blueVal);

    or the more general, mask supporting, cv::Mat::setTo(): 

    img.setTo(cv::Scalar(redVal,greenVal,blueVal));