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OpenCV implementations of adjust_hue and adjust_saturation

See original GitHub issue

Great repo. But it seems that adjust_hue and adjust_saturation functions are exactly the PIL implementations (PyTorch official implementations). I wonder are there OpenCV implementations for these two functions, since the adjust_hue is rather slow, and adjust_saturation is a little slow when compared with adjust_contrast and adjust_brightness functions.

In my testing cases, given one 224x224x3 input, adjust_contrast takes about 188 µs, adjust_saturation takes about 2.33 ms, and adjust_hue takes about 6.99 ms.

Issue Analytics

State:
Created 5 years ago
Comments:5 (2 by maintainers)

Top GitHub Comments

1reaction

jbohnslavcommented, Jan 7, 2019

I’ve done a quick check, and the way in which PIL and OpenCV calculate HSV from RGB images is quite different. This will make a 1->1 conversion between adjust_hue in PIL and OpenCV not possible.

0reactions

yxchngcommented, Jul 5, 2019

@cleardusk I tried your solution and it is not as good as Pillow’s version. It gives a lot of bad artifacts like this:

Screenshot from 2019-07-05 09-46-02

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