hsv2rgb

Scilab Function
Last update : 25/04/2007

hsv2rgb - Converts HSV colors to RGB

### Calling Sequence

  `[r,g,b] = hsv2rgb(h,s,v)`
  `rgb = hsv2rgb(h,s,v)`
  `[r,g,b] = hsv2rgb(hsv)`
  `rgb = hsv2rgb(hsv)`

### Parameters

- `h` : a vector of size n. The "hue" values.
- `s` : a vector of size n. The "saturation" values.
- `v` : a vector of size n. The "value" values
- `hsv` : a n x 3 matrix. Each row contains a [hue saturation value] tripple.
- `r` : a column vector of size n. The associated "red" values.
- `g` : a column vector of size n. The associated "green" values.
- `b` : a column vector of size n. The associated "blue" values.
- `rgb` : a n x 3 matrix. Each row contains a [red green blue] tripple.

### Description

The function hsv2rgb converts colormaps between the RGB and HSV color spaces. As hue varies from 0 to 1.0, the corresponding colors vary from red through yellow, green, cyan, blue, magenta, and back to red, so that there are actually red values both at 0 and 1.0. As saturation varies from 0 to 1.0, the corresponding colors (hues) vary from unsaturated (shades of gray) to fully saturated (no white component). As value, or brightness, varies from 0 to 1.0, the corresponding colors become increasingly brighter.

### Examples

        t=[0:0.3:2*%pi]'; z=sin(t)*cos(t');
        plot3d1(t,t,z)
        f=gcf();f.pixmap='on';
        for h=0:0.1:1
          hsv=[h*ones(32,1) linspace(0,1,32)' 0.7*ones(32,1)];
          f.color_map=hsv2rgb(hsv);
          show_pixmap()
          xpause(10000)
        end
        for v=0:0.1:1
          hsv=[ones(32,1) linspace(0,1,32)' v*ones(32,1)];
          f.color_map=hsv2rgb(hsv);
          show_pixmap()
          xpause(10000)
        end

### Authors

  Serge Steer INRIA