Histogram equalization

[ivan1993br]

Hi all,

I was just wondering if a Histogram equalization would be in the scope of this package, I didn't find any ROS Node that does that, so I was thinking about adding it here.

What do you think @k-okada ?

Thanks!

[k-okada]

@ivan1993br thank you for proposal Yes, addiing histgram equalization would be nice. This package is basically ROS node of opencv sample program and there already exsits https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/Histograms_Matching.
I have added some information on how to contirbute. so please look at
https://github.com/ros-perception/opencv_apps/blob/contrib/CONTRIBUTING.md

[bochen87]

since this feature is now available, would be really cool if it could be released as well!

[k-okada]

@bochen87 thanks,
I also added node related to histogram at #128 in addition to #126. Do you have any comment/review on that?

[bochen87]

Yes, I tested #126 with clahe to improve our image preprocessing pipeline for better april tag detection under different lighting conditions, works very well!

I can test out #128 next week.

Would be really awesome to release a new debian package version with all these new features!