converting YCbCr 4:4:4 to 4:2:0

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Ali akbar
Ali akbar on 27 Feb 2013
I'm trying to convert RGB to YCbCr 4:2:0,but when I insert this code to mathlab==>
ycbcrimage=rgb2ycbcr(RGB image)
in this case this code gives me 4:4:4 mode,but I want 4:2:0.
how can i get this?
thank you in advance for what you are trying to do for me.
good luck

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