rgb2hsv

SIVP Toolbox

Last update : August, 2006

rgb2hsv - Convert a RGB image to the equivalent HSV image.

Calling Sequence

HSV = rgb2hsv(RGB)

Parameters

RGB: A RGB image (hypermat), the dimension of RGB should be M x N x 3.
HSV: Output image, which has the same size as RGB and type of double.

Description

rgb2hsv convert a RGB image to the equivalent HSV image using:

V = max(R,G,B)

S = (V-min(R,G,B))/V if V<>0, 0 otherwise

H =

: (G - B)/6/S, if V=R;
: 1/2+(B - R)/6/S, if V=G;
: 2/3+(R - G)/6/S, if V=B.

Supported classes: INT8, UINT8, INT16, UINT16, INT32, DOUBLE. If RGB is not a double image, it will be converted to double image first in the procedure.

Examples


    RGB = imread('lena.png');
    HSV = rgb2hsv(RGB);
    RGB = hsv2rgb(HSV);
    imshow(RGB);

Authors

Shiqi Yu <shiqi.yu[at]gmail.com>

Availability

The latest version of SIVP can be found at