c++ - Adjusting contrast and brightness with OpenCV -

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so trying increase both contrast , brightness opencv bit. doing:

mat image_copy; cvtcolor(image, image_copy, cv_bgra2bgr); image_copy.convertto(image, -1, 1.3, 0.15);

image though looks strange. has blue tint. red , blue colours inverted. red jumper blue , blue can on table red.

why?

i trying achieve same effect when set contrast 30 , brightness 15 here:

http://camanjs.com/examples/


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