hsv2rgb
Convert HSV colors to RGB
Description
Examples
Convert HSV Matrix to a Colormap
Create a three-column HSV matrix that specifies five shades of blue. In this case, hue and value are constant, while saturation varies between 1.0
and 0.0
.
hsv = [.6 1 1; .6 .7 1; .6 .5 1; .6 .3 1; .6 0 1];
Convert the HSV matrix to a colormap by calling hsv2rgb
. Then use that colormap in a surface plot.
rgb = hsv2rgb(hsv); surf(peaks); colormap(rgb); colorbar
Convert 3-D HSV Array to a Truecolor Image
Create a 2-by2-by-3 HSV array that specifies four shades of blue.
hsv(:,:,1) = ones(2,2)*.6; hsv(:,:,2) = [1 .7; .3 0]; hsv(:,:,3) = ones(2,2);
Convert the HSV array to a truecolor image using hsv2rgb
. Then display the image.
rgb = hsv2rgb(hsv); image(rgb);
Input Arguments
HSV
— HSV image
m-by-n-by-3 numeric array
HSV image, specified as an
m-by-n-by-3 numeric array with values
in the range [0, 1]. The third dimension of HSV
defines
the hue, saturation, and value for each pixel, respectively, as described in
the table.
Attribute | Description |
---|---|
Hue | Value from 0 to
1 that corresponds to the color’s
position on a color wheel. As hue increases from
0 to 1 , the
color transitions from red to orange, yellow, green,
cyan, blue, magenta, and finally back to red. |
Saturation | Amount of hue or departure from neutral.
0 indicates a neutral shade,
whereas 1 indicates maximum
saturation. |
Value | Maximum value among the red, green, and blue components of a specific color. |
Data Types: double
| single
| logical
hsvmap
— HSV colormap
c-by-3 numeric matrix
HSV colormap, specified as a c-by-3 numeric matrix with
values in the range [0, 1]. Each row of hsvmap
is a
three-element HSV triplet that specifies the hue, saturation, and value
components of a single color of the colormap.
Data Types: double
Output Arguments
RGB
— RGB image
m-by-n-by-3 numeric array
RGB image, returned as an
m-by-n-by-3 numeric array with values
in the range [0, 1]. The third dimension of RGB
defines
the red, green, and blue intensity of each pixel, respectively. The image
has the same data type as the HSV image, HSV
.
Data Types: double
| single
rgbmap
— RGB colormap
c-by-3 numeric matrix
RGB colormap, returned as a c-by-3 numeric matrix with
values in the range [0, 1]. Each row of rgbmap
is a
three-element RGB triplet that specifies the ref, green, and blue components
of a single color of the colormap. The colormap has the same data type as
the HSV colormap, hsvmap
.
Data Types: double
| single
References
[1] Smith, A. R. “Color Gamut Transform Pairs”. SIGGRAPH 78 Conference Proceedings. 1978, pp. 12–19.
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
GPU Code Generation
Generate CUDA® code for NVIDIA® GPUs using GPU Coder™.
Thread-Based Environment
Run code in the background using MATLAB® backgroundPool
or accelerate code with Parallel Computing Toolbox™ ThreadPool
.
This function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.
GPU Arrays
Accelerate code by running on a graphics processing unit (GPU) using Parallel Computing Toolbox™.
The hsv2rgb
function
fully supports GPU arrays. To run the function on a GPU, specify the input data as a gpuArray
(Parallel Computing Toolbox). For more information, see Run MATLAB Functions on a GPU (Parallel Computing Toolbox).
Distributed Arrays
Partition large arrays across the combined memory of your cluster using Parallel Computing Toolbox™.
This function fully supports distributed arrays. For more information, see Run MATLAB Functions with Distributed Arrays (Parallel Computing Toolbox).
Version History
Introduced before R2006a
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