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Comparing ray/doc/man/man1/pvalue.1 (file contents):
Revision 1.7 by greg, Mon Nov 10 19:08:17 2008 UTC vs.
Revision 1.10 by greg, Mon Jul 15 23:42:44 2019 UTC

#	Line 42 | Line 42 | these files.
42		.TP 10n
43		.BR \-u
44		Print only unique values in the output, skipping runs of equal pixels.
45	+	For reverse conversions, the
46	+	.I \-u
47	+	option writes uncompressed output rather than the standard run-length RGBE
48	+	encoding.
49		Specifying
50		.I \+u
51		turns this option off, which is the default.
#	Line 76 | Line 80 | causes the resolution string to be printed, which is t
80		Skip the specified number of bytes on the input header.
81		This option is useful for skipping unintelligible headers in
82		foreign file formats.
79	–	(Does not work when reading from standard input.)
83		.TP
84		.BI \-e \ exposure
85		Adjust the exposure by the amount specified.
#	Line 180 | Line 183 | Specifying
183		converts from a Radiance picture to other values, which is the
184		default.
185		.TP
186	+	.BI \-p " xr yr xg yg xb yb xw yw"
187	+	On reverse conversion, RGB input uses the given set of color primaries.
188	+	These are written into the output header with the PRIMARIES variable.
189	+	.TP
190	+	.BR \-pXYZ
191	+	On reverse conversion, input is in CIE XYZ coordinates, rather than RGB.
192	+	The Y channel is assumed to be in candelas/meter^2.
193	+	.TP
194		.BI -y \ res
195		Set the output y resolution to
196		.I res.
#	Line 241 | Line 252 | conversion, so this information is not used in determi
252		the scanline ordering or picture size.
253		.SH "SEE ALSO"
254		getinfo(1), pcompos(1), pfilt(1), pflip(1),
255	<	protate(1), rpict(1), rtrace(1), rvu(1)
255	>	protate(1), ra_xyze(1), rpict(1), rtrace(1), rvu(1)

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