Horizontal Histogram in OpenCV

Question

I am newbie to OpenCV,now I am making a senior project related Image processing. I have a question: Can I make a horizontal or vertical histogram with some functions of Open

Answer 1

The most efficient way to do this is by using the cvReduce function. There's a parameter to allow to select if you want an horizontal or vertical projection.

You can also do it by hand with the functions cvGetCol and cvGetRow combined with cvSum.