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-satura-
       tion (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__oouuttppuutt==_n_a_m_e	  iinntteennssiittyy__oouuttppuutt==_n_a_m_e   ssaattuurraattiioonn__oouutt--
       ppuutt==_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 com-
       ponents and produces three output raster map layers repre-
       senting	the  hue,  intensity, and saturation of the data.
       The output raster map layers are  created  by  a  standard
       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 geo-
       graphic region definition and mask settings are respected.

   PPaarraammeetteerrss::
       rreedd__iinnppuutt==_n_a_m_e
	      Input  raster map layer representing the red compo-
	      nent.

       ggrreeeenn__iinnppuutt==_n_a_m_e
	      Input raster map layer representing the green  com-
	      ponent.

       bblluuee__iinnppuutt==_n_a_m_e
	      Input raster map layer representing the blue compo-
	      nent.

       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  Univer-
       sity,
       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)
