YUV color space: modifying U and V without Y ?

YUV
Color

asked 2015-03-09 10:37:44 -0600

begueradj
103 ●4 ●7 ●13

I read a picture with OpenCV and Python. I convert it from BGR to YUV color space.

Now I change the values of U and V of each pixel: will Y be automatically update ? Or have I to set it programmatically too ?

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answered 2015-03-09 10:43:00 -0600

FooBar
2938 ●9 ●37 http://magazino.eu/

How should Y be updated?

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I asked because I think Y depends on Y and V ?

begueradj ( 2015-03-09 10:44:43 -0600 )edit

The matrix itself does not know if it is representing RGB or YUV. It just stores data. There would have to be some king of daemon running that checks if you change the data in the data-array of the cv::Mat and somehow updates the other values. (I've never really worked with YUV, but why would you store 3 dimensions if you can compute one value from the other two?)