i.rgb.his(1)		      Grass User's Manual		  i.rgb.his(1)



NNAAMMEE
       _i_._r_g_b_._h_i_s   -  Red-green-blue  (rgb)  to hue-intensity-saturation (his)
       raster map color transformation function.
       _(_G_R_A_S_S _I_m_a_g_e _P_r_o_c_e_s_s_i_n_g _P_r_o_g_r_a_m_)

SSYYNNOOPPSSIISS
       ii..rrggbb..hhiiss
       ii..rrggbb..hhiiss hheellpp
       ii..rrggbb..hhiiss  rreedd__iinnppuutt==_n_a_m_e  ggrreeeenn__iinnppuutt==_n_a_m_e  bblluuee__iinnppuutt==_n_a_m_e   hhuuee__oouutt--
       ppuutt==_n_a_m_e iinntteennssiittyy__oouuttppuutt==_n_a_m_e ssaattuurraattiioonn__oouuttppuutt==_n_a_m_e

DDEESSCCRRIIPPTTIIOONN
       _i_._r_g_b_._h_i_s  is  an  image  processing program that processes three input
       raster map layers as red, green, and blue components and produces three
       output  raster  map layers representing the hue, intensity, and satura-
       tion of the data.  The output raster map layers are created by a  stan-
       dard  red-green-blue  (rgb)  to	hue-intensity-saturation  (his)  color
       transformation.	Each output raster map layer is given  a  linear  gray
       scale  color  table.  The current geographic region definition and mask
       settings are respected.

   PPaarraammeetteerrss::
       rreedd__iinnppuutt==_n_a_m_e
	      Input raster map layer representing the red component.

       ggrreeeenn__iinnppuutt==_n_a_m_e
	      Input raster map layer representing the green component.

       bblluuee__iinnppuutt==_n_a_m_e
	      Input raster map layer representing the blue component.

       hhuuee__oouuttppuutt==_n_a_m_e
	      Output raster map layer representing hue.

       iinntteennssiittyy__oouuttppuutt==_n_a_m_e
	      Output raster map layer representing intensity.

       ssaattuurraattiioonn__oouuttppuutt==_n_a_m_e
	      Output raster map layer representing saturation.


SSEEEE AALLSSOO
       _h_s_v_._r_g_b_._s_h

       _i_._h_i_s_._r_g_b

       _r_g_b_._h_s_v_._s_h

AAUUTTHHOORR
       David Satnik, GIS Laboratory, Central Washington University,
       with acknowledgements to Ali Vali, Space Research Center, for the  core
       routine.

       _L_a_s_t _c_h_a_n_g_e_d_: _$_D_a_t_e_: _2_0_0_2_/_0_1_/_2_5 _0_5_:_4_5_:_3_3 _$



GRASS 5.0							  i.rgb.his(1)
