143 |
|
The |
144 |
|
.I "\-o x0 y0" |
145 |
|
option specifies a nonzero anchor point for the bottom left image. |
146 |
+ |
If a negative value is given for ncols, then the rows are reversed, |
147 |
+ |
so they start from the top rather than the bottom. |
148 |
+ |
This gives a more natural ordering in most cases, but has the |
149 |
+ |
side-effect of moving any labels from the upper-left of each placed |
150 |
+ |
subimage to the lower-left. |
151 |
+ |
Also, the |
152 |
+ |
.I \-o |
153 |
+ |
option is interpreted differently, where the y0 value is number of |
154 |
+ |
pixels from the top (rather than the bottom). |
155 |
|
.PP |
156 |
|
The standard input can be specified with a hyphen ('-'). |
157 |
|
A command that produces a RADIANCE picture can be given in place of a file |
159 |
|
.SH EXAMPLE |
160 |
|
To put a copyright label at the bottom of a picture: |
161 |
|
.IP "" .2i |
162 |
< |
psign Copyright 1987 | pcompos pic.inp 0 0 +t .5 - 384 64 > pic.out |
162 |
> |
psign Copyright 1987 | pcompos inp.hdr 0 0 +t .5 - 384 64 > out.hdr |
163 |
|
.PP |
164 |
< |
To make a catalog of images separated by white 10-pixel borders: |
164 |
> |
To make a catalog of images separated by white 10-pixel borders and |
165 |
> |
ordered four images per row starting from the top-left: |
166 |
|
.IP "" .2i |
167 |
< |
pcompos -la -a 4 -s 10 -b 1 1 1 dog*.pic > alldogs.pic |
167 |
> |
pcompos -la -a -4 -s 10 -b 1 1 1 dog*.hdr > alldogs.hdr |
168 |
|
.SH NOTES |
169 |
|
Since there is a limit to the number of open files and processes, |
170 |
|
large collections of images must be created in stages. |
171 |
|
Even if the system limit on open files is large, |
172 |
|
.I pcompos |
173 |
< |
places an artificial limit of 64 on the number of open files and/or |
173 |
> |
places an artificial limit of 1024 on the number of open files and/or |
174 |
|
processes. |
175 |
+ |
.PP |
176 |
+ |
The EXPOSURE= line is ignored on the input except when there is only |
177 |
+ |
a single input picture, or mutliple pictures all have the same |
178 |
+ |
exposure value. |
179 |
+ |
In such cases, |
180 |
+ |
.I pcompos |
181 |
+ |
will echo the exposure line to the output header appropriately, |
182 |
+ |
so that absolute calibration is maintained. |
183 |
|
.SH AUTHOR |
184 |
|
Greg Ward |
185 |
|
.SH "SEE ALSO" |
186 |
< |
getinfo(1), pcomb(1), pfilt(1), psign(1), rpict(1) |
186 |
> |
getinfo(1), pcomb(1), pfilt(1), psign(1), rcrop(1), rpict(1) |