How to get the YUV value for each pixel?

Question

Rachel 2014-2-17

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/116423-how-to-get-the-yuv-value-for-each-pixel

编辑： DGM 2021-11-4

采纳的回答： Dishant Arora

Hi everyone

I am new to matlab, so any help would be appreciated.

I have an image and I need to get the YUV value for each pixel in the image.

Can anyone help? Thanks in advance

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Dishant Arora 2014-2-17

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/116423-how-to-get-the-yuv-value-for-each-pixel#answer_124634

在 MATLAB Online 中打开

if you have a RGB image you can convert it into YUV using below mentioned equations:

Y = R*(0.299000) + G*(0.587000) + B*(0.114000);
U = R*(-0.168736) + G*(-0.331264) + B*(0.500000) + 128;
V = R*(0.500000) + G*(-0.418688) + B*(-0.081312) + 128;

2 个评论
显示无隐藏无

Rachel 2014-2-17

Thanks a lot!

DGM 2021-11-3

编辑：DGM 2021-11-4

That's not YUV. That's more or less YPbPr, or YCbCr without the margins. The offset implies that the RGB image is uint8-scaled, though if it were actually uint8, the operations would result in severe data truncation. The only case in which this would work is if R,G,and B were uint8-scaled floating-point data.

This covers general luma-chroma conversions, including YUV:

https://www.mathworks.com/matlabcentral/answers/421371-is-there-a-direct-function-for-rgb-to-yuv-color-space-conversion-please-help

If actual YCbCr conversion is desired with margins, just use rgb2ycbcr().

请先登录，再进行评论。