how to display a Mat in Opencv

Question

For the mat which stores images, it is easy to show it using imshow.But if the data type of the Mat is CV_32FC1, how can I display this mat ?

I tried i

Answer 1

If image is a Mat of type CV_32F, If the image is 32-bit floating-point, imshow() multiplies the pixel values by 255 - that is, the value range [0,1] is mapped to [0,255]. So your floating point image has to have a range 0 .. 1.

This will display a CV32F image, no matter what the range is:

        cv::Mat dst
        cv::normalize(image, dst, 0, 1, cv::NORM_MINMAX);
        cv::imshow("test", dst);
        cv::waitKey(0);