[magick-users] yuv -> rgb convertion difficulty

[Fred Weinhaus]

best I can suggest is to look at 
http://www.imagemagick.org/script/command-line-options.php#colorspace

other than that you need answers from the IM folks as I am not an 
expert on these matters.

First from the above link you will see that YUV is not the same as YCbCr.

Second I suspect you get Y, Cb, Cr and not Y, Cb, Y, Cr  (3 channels 
and not 4) from IM

Or Y, U, V again as 3 channels from IIM


You can try

convert yuvimage -separate yuvimage_%d.png

and see how many images you get (yuvimage_0.png, yuvimage_1.png ....)

I suspect 3, the first is Y, the second is U and the third is V

or

the first is Y, the second is Cb and the third is Cr

depending upon your input format.