man/man1/ra_t16.1

.\" RCSid "$Id: ra_t16.1,v 1.2 2003/12/09 15:59:06 greg Exp $"
.TH RA_T16 1 11/15/93 RADIANCE
.SH NAME
ra_t16 - convert RADIANCE picture to/from Targa 16 or 24-bit image file
.SH SYNOPSIS
.B ra_t16
[
.B \-2
][
.B \-3
][
.B "\-g gamma"
][
.B "\-e +/-stops"
]
[
.B input
[
.B output
]
]
.br
.B ra_t16
.B \-r
[
.B "\-g gamma"
][
.B "\-e +/-stops"
]
[
.B input
[
.B output
]
]
.SH DESCRIPTION
.I Ra_t16
converts between RADIANCE and Targa 16-bit or 24-bit RGB image files
(type 2 in Targa's documentation).
In the default mode, a RADIANCE picture is converted to an
RGB file of the same horizontal and vertical dimensions with
16-bits per pixel.
The
.I \-3
option tells the program to produce a 24-bit image file instead.
The
.I \-g
option specifies the exponent used in gamma correction;
the default value is 2.2.
An exponent of 1.0 turns gamma correction off.
The
.I \-e
option specifies an exposure compensation in f-stops (powers of two).
Only integer stops are allowed, for efficiency.
The
.I \-r
option invokes a reverse conversion, from a 16-bit or 24-bit
Targa file to a RADIANCE picture.
The determination of depth is made automatically on reverse
translation, so the
.I \-2
and
.I \-3
options are not necessary.
If the output file is missing, the standard output is used.
.SH AUTHORS
Greg Ward
.SH BUGS
Run-length encoded files can be read but not written with this
program.
.SH "SEE ALSO"
pfilt(1), ra_bmp(1), ra_bn(1), ra_ppm(1), ra_pr(1), ra_pr24(1),
ra_t8(1), ra_tiff(1), ximage(1)
Revision:	1.3
Committed:	Fri Mar 26 22:58:20 2004 UTC (20 years, 1 month ago) by greg
Branch:	MAIN
CVS Tags:	rad5R4, rad5R2, rad4R2P2, rad5R0, rad5R1, rad3R7P2, rad3R7P1, rad4R2, rad4R1, rad4R0, rad3R6, rad3R6P1, rad3R8, rad3R9, rad4R2P1, rad5R3, HEAD
Changes since 1.2:	+2 -2 lines
Log Message:	Added support to ra_bmp for 16-bit images and RLE, plus created man page
#	Content
1	.\" RCSid "$Id: ra_t16.1,v 1.2 2003/12/09 15:59:06 greg Exp $"
2	.TH RA_T16 1 11/15/93 RADIANCE
3	.SH NAME
4	ra_t16 - convert RADIANCE picture to/from Targa 16 or 24-bit image file
5	.SH SYNOPSIS
6	.B ra_t16
7	[
8	.B \-2
9	][
10	.B \-3
11	][
12	.B "\-g gamma"
13	][
14	.B "\-e +/-stops"
15	]
16	[
17	.B input
18	[
19	.B output
20	]
21	]
22	.br
23	.B ra_t16
24	.B \-r
25	[
26	.B "\-g gamma"
27	][
28	.B "\-e +/-stops"
29	]
30	[
31	.B input
32	[
33	.B output
34	]
35	]
36	.SH DESCRIPTION
37	.I Ra_t16
38	converts between RADIANCE and Targa 16-bit or 24-bit RGB image files
39	(type 2 in Targa's documentation).
40	In the default mode, a RADIANCE picture is converted to an
41	RGB file of the same horizontal and vertical dimensions with
42	16-bits per pixel.
43	The
44	.I \-3
45	option tells the program to produce a 24-bit image file instead.
46	The
47	.I \-g
48	option specifies the exponent used in gamma correction;
49	the default value is 2.2.
50	An exponent of 1.0 turns gamma correction off.
51	The
52	.I \-e
53	option specifies an exposure compensation in f-stops (powers of two).
54	Only integer stops are allowed, for efficiency.
55	The
56	.I \-r
57	option invokes a reverse conversion, from a 16-bit or 24-bit
58	Targa file to a RADIANCE picture.
59	The determination of depth is made automatically on reverse
60	translation, so the
61	.I \-2
62	and
63	.I \-3
64	options are not necessary.
65	If the output file is missing, the standard output is used.
66	.SH AUTHORS
67	Greg Ward
68	.SH BUGS
69	Run-length encoded files can be read but not written with this
70	program.
71	.SH "SEE ALSO"
72	pfilt(1), ra_bmp(1), ra_bn(1), ra_ppm(1), ra_pr(1), ra_pr24(1),
73	ra_t8(1), ra_tiff(1), ximage(1)