OpenCV: How to use other font than HERSHEY with cvPutText (like Arial)

Question

I want to write to an image a formatted text. OpenCV offers only a limited set of default fonts. Is it possible to use others? For example to read them from the *.ttf file (in Ubuntu)?

Answer 1

It's possible to use other fonts but you need to link the Qt library to OpenCV and use the cvAddText function with a cvFontQt

http://docs.opencv.org/modules/highgui/doc/qt_new_functions.html#addtext

http://docs.opencv.org/modules/highgui/doc/qt_new_functions.html#fontqt

There are other solutions you might try, with more or less the same performance as OpenCV. For instance, you can use CAIRO to write fonts into the image.