Draw a histogram of a color image using Opencv

Question

can anyone connect me or give an example code in C / C ++ that creates histograms for color image (RGB) and displays them?

Answer 1

The following are very good guides for drawing a bar chart with an open CV:
http://aishack.in/tutorials/drawing-histograms-opencv/

Codes are easy to follow!

Answer 2

The OpenCV 2.3 documentation has a new guide for building a histogram for a color image .

Answer 3

Ive, :

http://opencv-code.com/tutorials/drawing-histograms-in-opencv/

Answer 4

opencv has built-in histograms. The documentation shows an example: http://opencv.willowgarage.com/documentation/cpp/histograms.html

Answer 5

I learned from them, they could help →

http://docs.opencv.org/doc/tutorials/imgproc/histograms/histogram_calculation/histogram_calculation.html

and

http://docs.opencv.org/doc/tutorials/imgproc/histograms/histogram_comparison/histogram_comparison.html