g++ or gcc

[chezhqant]

Hi, i just want to read a picture, but i can't understand you functions. so i use opencv2.4.9, unfortunately it can't be compiled gtk3.0, then i got the result which presents “Gtk-ERROR **: GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported”.
then i use opencv3.0, but it is no support for direct C compilation. and is you code no support for g++? i use g++ compile it and got "undefined reference to ...", which is some functions have no reference.
if possible, i hope you can give me some advice.
Thanks!

[xhbdahai]

@chezhai You can use API "vimage_from_file" in file "libfcv/fcvimage.c" to read pictures from jpg files. Do net recommend use opencv, and do not validate it with opencv.

[chezhqant]

yeah, thanks for you reply. it gives me more courage.
i have used "vimage_from_file" to read image, but it seems only imread, after reading i can't tackle anything. for example, "greydata_from_frame" just accepts "captureCamera *", and you example code seems only accept "captureCamera *". is there some API to accept "fcvImage *", let me convert jpg to gray image, and do something just use "fcvImage *"?