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imwrite() can only save float images in ".exr" or ".hdr" format, and that only, if you built in suppport for that (WITH_OPENEXR).

alternatively, you can use the FileStorage, to save your img to yml (text):

FileStorage fs("my.yml", 1); fs << "some_name" << mat;
fs.release();

imwrite() can only save float images in ".exr" or ".hdr" format, and that only, if you built in suppport for that (WITH_OPENEXR).

alternatively, you can use the FileStorage, to save your img to yml (text):

 FileStorage fs("my.yml", 1);
fs << "some_name" << mat; 
image;  fs.release();
fs.release();

imwrite() can only save float images in ".exr" or ".hdr" format, and that only, if you built in suppport for that (WITH_OPENEXR).

Mat floatImg = ...
Mat ucharImg;
floatImg.convertTo(ucharImg, CV_8U, 255.0);
imwrite("my.png", ucharImg);

alternatively, you can use the FileStorage, to save your img to yml (text):

 FileStorage fs("my.yml", 1);
 fs << "some_name" << image;  
 fs.release();