MATLAB: Ycbcr to grayscale?

color spacegrayImage Processing Toolboxycbcr

Is there any way to convert ycbcr to grayscale? eg

Best Answer

Note that there are many ways of converting colour to greyscale. Any weighted sum of the colour components can be a greyscale conversion.

Your Y component of the ycbcr triplet is already such a weighted sum. So you could just use that as a greyscale image.

Otherwise, you can always

rgb2gray(ycbcr2rgb(yourimage))

edit: an r was missing. Thanks Image Analyst

Related Solutions

MATLAB: Converting gray scale to ycbcr?

A greyscale image has no colour information, but you can still represent it as ycbcr if you wish - though it's not clear why you'd want to, since the chrominance planes will be constants. Anyway, this will convert, assuming you're starting from a 2D greyscale image:

    rgbimage(:,:,1) = greyimage;
    rgbimage(:,:,2) = greyimage;
    rgbimage(:,:,3) = greyimage;
    ycbcrimage = rgb2ycbcr(rgbimage);

You can also convert a colormap using the same function, if that's what you want to do.

MATLAB: Convert RGB to YCbCr

Does the information in the Help help you:

YCBCR = rgb2ycbcr(RGB) converts the truecolor image RGB to the equivalent image in the YCbCr color space. RGB must be a M-by-N-by-3 array.
If the input is uint8, YCBCR is uint8, where Y is in the range [16 235], and Cb and Cr are in the range [16 240]. If the input is a double, Y is in the range [16/255 235/255] and Cb and Cr are in the range [16/255 240/255]. If the input is uint16, Y is in the range [4112 60395] and Cb and Cr are in the range [4112 61680].

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MATLAB: Converting gray scale to ycbcr?

MATLAB: Convert RGB to YCbCr

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