


PPM2CYUV(1)                                           PPM2CYUV(1)


NNAAMMEE
       ppm2cyuv - Component Y Cb Cr (YUV) conversion to raw PPM

SSYYNNOOPPSSIISS
       ppppmm22ccyyuuvv iinnffiillee oouuttffiillee [[--zz ssuuffffiixx]]** [[--CCCCIIRR660011]]

DDEESSCCRRIIPPTTIIOONN
       _p_p_m_2_c_y_u_v is a conversion program between component the raw
       ppm file format and component yuv files.  The chrominances
       of  the  input  are decimated by a factor of 2 in both the
       horizontal and vertial dimensions.


OOPPTTIIOONNSS
       --CCCCIIRR660011
              specifies that the CCIR601 YCbCr colorspace  is  to
              be used instead of the JFIF colorspace.

       --zz     denotes  the  component file suffixes in sequential
              order. For example
               --zz ..yy..ccllrr --zz ..uu..ccllrr --zz ..vv..ccllrr indicates  that  the
              luminance  and the two chrominance files end with a
              suffix of  ..yy..ccllrr,,  ..uu..ccllrr,,  and  ..vv..ccllrr,,  in  that
              order.  If unspecified, the suffixes default to ..YY,,
              UU,, and ..VV..


EEXXAAMMPPLLEESS
       To convert a ppm file in iinn..ppppmm
       to a triple set of raw raster scan YCbCr  (also  known  as
       digital  YUV) files with dimension 352x240 Y, 176x120 U,V,
       with labels, hheelllloo00..YY hheelllloo00..UU hheelllloo00..VV,, type

       ppppmm22ccyyuuvv iinn..ppppmm hheelllloo00

       The PPM file format is very portable - see Jef Poskanzer's
       PBMPLUS library.


FFTTPP
       _p_p_m_2_c_y_u_v   is   available  by  anonymous  ftp  from  _h_a_v_e_-
       _f_u_n_._s_t_a_n_f_o_r_d_._e_d_u_:_p_u_b_/_c_v_/_C_V_v_1_._2_._1_._t_a_r_._Z_.


BBUUGGSS
       Probably lurking somewhere.  Please inform the  author  at
       achung@cs.stanford.edu if any bugs are found.


AAUUTTHHOORR
       Andy Hung






                           14 June 1993                         1


