Convert RGB color values to YCbCr color space (2024)

FAQs

How to convert RGB to YCbCr? ›

YCBCR = rgb2ycbcr( RGB ) converts the red, green, and blue values of an RGB image to luminance (Y) and chrominance (Cb and Cr) values of a YCbCr image.

But medical research proved that the human eye has different sensitivity to colour and brightness. Thus there came about the transformation of RGB to YCbCr. Y: Luminance; Cb: Chrominance-Blue; and Cr: Chrominance-Red are the components. Luminance is very similar to the grayscale version of the original image.

Convert Image from RGB to YCbCr

RGB = imread("board. tif"); Convert the image to YCbCr. imshow(YCBCR); title("Image in YCbCr Color Space");

The difference between YCbCr and RGB is that RGB represents colors as combinations of red, green and blue signals, while YCbCr represents colors as combinations of a brightness signal and two chroma signals. In YCbCr, Y is luma (brightness), Cb is blue minus luma (B-Y) and Cr is red minus luma (R-Y).

RGB High is often preferred for its fidelity, especially when used with TVs that handle a full RGB signal well, presenting a picture without alterations in contrast or brightness range. Meanwhile, YCbCr is suitable for compatibility and bandwidth efficiency.

Conversion from RGB to YCbCr allows for efficient video storage and broadcasting. For instance, signals in the YCbCr color space, as opposed to RGB, can be compressed significantly, which is pivotal for bandwidth-restricted applications.

The difference between YCbCr and RGB is that YCbCr represents color as brightness and two color difference signals, while RGB represents color as red, green and blue. In YCbCr, the Y is the brightness (luma), Cb is blue minus luma (B-Y) and Cr is red minus luma (R-Y). See component video.

The YCbCr format contains a subset of color coding data, also referred to as Chroma Subsampling and represented in the 4:n:n (Y:Cb:Cr) format. The left digit denotes luminance, the middle digit represents the blue channel, and the right digit is the red channel.

Another color space, widely used for digital video, is the YCbCr color space. In this color space, luminance (brightness or intensity) information is stored as a single component (Y). Chrominance (color) information is stored as two color-difference components (Cb and Cr).

How to convert RGB image to black and white in MATLAB? ›

I = rgb2gray( RGB ) converts the truecolor image RGB to the grayscale image I . The rgb2gray function converts RGB images to grayscale by eliminating the hue and saturation information while retaining the luminance.

Open the Image in Photoshop and select Image> Mode > RGB Color to convert it to RGB color mode. When converting an image to RGB, the actual colors in the Image will not change.

Y′PbPr to Y′CbCr

For example, the scaling and offset applied to the Y′ component per specification (e.g. MPEG-2) results in the value of 16 for black and the value of 235 for white when using an 8-bit representation.

The rgb() command is the key: you define a new color using numerical values (0–255) for red, green and blue. In addition, you set an alpha value (also 0–255), which sets the transparency (0 being fully transparent and 255 being “solid”).

RGB Color Values

Another example, rgb(0, 255, 0) is displayed as green, because green is set to its highest value (255), and the other two (red and blue) are set to 0. To display black, set all color parameters to 0, like this: rgb(0, 0, 0).

In order to convert an RGB color code to a hex color code, you must convert each of the values individually.