--- ray/doc/man/man1/pcomb.1	2003/12/09 15:59:06	1.4
+++ ray/doc/man/man1/pcomb.1	2007/09/04 17:36:40	1.8
@@ -1,10 +1,12 @@
-.\" RCSid "$Id: pcomb.1,v 1.4 2003/12/09 15:59:06 greg Exp $"
+.\" RCSid "$Id: pcomb.1,v 1.8 2007/09/04 17:36:40 greg Exp $"
 .TH PCOMB 1 8/31/96 RADIANCE
 .SH NAME
 pcomb - combine RADIANCE pictures
 .SH SYNOPSIS
 .B pcomb
 [
+.B -h
+][
 .B -w
 ][
 .B "\-x xres"
@@ -68,7 +70,7 @@ For example,
 would return the red component of the pixel from picture 3
 that is left 2 and up 1 from the current position.
 Although x offsets may be as large as width of the picture,
-y offsets are limited to a small window (+/- 8 pixels) due to efficiency
+y offsets are limited to a small window (+/- 32 pixels) due to efficiency
 considerations.
 However, it is not usually necessary to worry about this problem --
 if the requested offset is not available, the next best pixel is
@@ -140,6 +142,13 @@ will return a negative value, and
 will return zero.
 .PP
 The
+.I \-h
+option may be used to reduce the information header size, which
+can grow disproportionately after multiple runs of
+.I pcomb
+and/or
+.I pcompos(1).
+The
 .I \-w
 option can be used to suppress warning messages about invalid
 calculations.
@@ -189,24 +198,24 @@ by preceeding it with an exclamation point ('!').
 .SH EXAMPLES
 To produce a picture showing the difference between pic1 and pic2:
 .IP "" .2i
-pcomb -e 'ro=ri(1)-ri(2);go=gi(1)-gi(2);bo=bi(1)-bi(2)' pic1 pic2 > diff
+pcomb \-e 'ro=ri(1)\-ri(2);go=gi(1)\-gi(2);bo=bi(1)\-bi(2)' pic1 pic2 > diff
 .PP
 Or, more efficiently:
 .IP "" .2i
-pcomb pic1 -s -1 pic2 > diff
+pcomb pic1 \-s \-1 pic2 > diff
 .PP
 To precompute the gamma correction for a picture:
 .IP "" .2i
-pcomb -e 'ro=ri(1)^.4;go=gi(1)^.4;bo=bi(1)^.4' pic > pic.gam
+pcomb \-e 'ro=ri(1)^.4;go=gi(1)^.4;bo=bi(1)^.4' pic > pic.gam
 .PP
 To perform some special filtering:
 .IP "" .2i
-pcomb -f myfilt.cal -x xmax/2 -y ymax/2 input.pic > filtered.pic
+pcomb \-f myfilt.cal \-x xmax/2 \-y ymax/2 input.pic > filtered.pic
 .PP
 To make a picture of a dot:
 .IP "" .2i
-pcomb -x 100 -y 100 -e 'ro=b;go=b;bo=b;b=if((x-50)^2+(y-50)^2-25^2,0,1)' > dot
+pcomb \-x 100 \-y 100 \-e 'ro=b;go=b;bo=b;b=if((x-50)^2+(y-50)^2\-25^2,0,1)' > dot
 .SH AUTHOR
 Greg Ward
 .SH "SEE ALSO"
-calc(1), getinfo(1), pcompos(1), pfilt(1), rpict(1)
+getinfo(1), icalc(1), pcompos(1), pfilt(1), rpict(1)