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ycbcr2rgb

Convert YCbCr color values to RGB color space

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Syntax

RGB = ycbcr2rgb(YCBCR)

Description

RGB = ycbcr2rgb(YCBCR) converts the luminance (Y) and chrominance (Cb and Cr) values of a YCbCr image to red, green, and blue values of an RGB image.

example

Examples

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Open Live Script

This example shows how to convert an image from RGB to YCbCr color space and back.

Read an RGB image into the workspace.

RGB = imread('board.tif');

Convert the image to YCbCr color space.

YCBCR = rgb2ycbcr(RGB);

Convert the YCbCr image back to RGB color space.

RGB2 = ycbcr2rgb(YCBCR);

Display the luminance channel of the image in YCbCr color space alongside the image that was converted from YCbCr to RGB color space.

figure
subplot(1,2,1)
imshow(YCBCR(:,:,1))
title('Original Luminance (Y)');
subplot(1,2,2)
imshow(RGB2);
title('Image Converted to RGB');

Figure contains 2 axes objects. Hidden axes object 1 with title Original Luminance (Y) contains an object of type image. Hidden axes object 2 with title Image Converted to RGB contains an object of type image.

Input Arguments

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YCbCr color values to convert, specified as a numeric array in one of these formats.

  • c-by-3 colormap. Each row specifies one YCbCr color value.

  • m-by-n-by-3 image.

Data Types: single | double | uint8 | uint16

Output Arguments

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Converted RGB color values, returned as a numeric array of the same size as the input. The output data type is the same as the input data type.

References

[1] Poynton, C. A. A Technical Introduction to Digital Video, John Wiley & Sons, Inc., 1996, p. 175.

[2] Rec. ITU-R BT.601-5, Studio Encoding Parameters of Digital Television for Standard 4:3 and Wide-screen 16:9 Aspect Ratios, (1982-1986-1990-1992-1994-1995), Section 3.5.

Extended Capabilities

GPU Code Generation
Generate CUDA® code for NVIDIA® GPUs using GPU Coder™.

Version History

Introduced before R2006a

See Also

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