| 11 |
|
][ |
| 12 |
|
.B \-f[afdc] |
| 13 |
|
][ |
| 14 |
+ |
.B "\-n nproc" |
| 15 |
+ |
][ |
| 16 |
|
.B "\-f file" |
| 17 |
|
][ |
| 18 |
|
.B "\-e expr" |
| 143 |
|
is specified for an input picture or the |
| 144 |
|
.I "-fc" |
| 145 |
|
option is given, the output will be written as a RGBE or XYZE picture. |
| 146 |
< |
Note that conversion from a float or RGBE color space applies a conversion |
| 146 |
> |
Note that conversion from a float or RGBE color space applies an efficacy factor |
| 147 |
|
of 179 lumens/watt (for CIE or melanopic output) or 412 (for scotopic output), |
| 148 |
< |
and the reverse happens for conversion from XYZE input to RGB or RGBE output. |
| 148 |
> |
and the inverse happens for conversion from XYZE input to RGB or RGBE output. |
| 149 |
|
Lower case versions of all these components are also supported, the only |
| 150 |
< |
difference is that the aforementioned efficacy factors |
| 149 |
< |
will be left out of the conversion. |
| 150 |
> |
difference being that the efficacy factors are ignored. |
| 151 |
|
.PP |
| 152 |
|
If a matrix or picture file path is given to the |
| 153 |
|
.I \-c |
| 251 |
|
.I \-w |
| 252 |
|
option turns off warnings about divide-by-zero and other non-fatal |
| 253 |
|
calculation errors. |
| 254 |
+ |
.PP |
| 255 |
+ |
The |
| 256 |
+ |
.I \-n |
| 257 |
+ |
option specifies how many execution processes to employ, |
| 258 |
+ |
which may improve performance on multi-core architectures, |
| 259 |
+ |
especially for matrix multiplication |
| 260 |
+ |
and complex operations on long input rows. |
| 261 |
|
.SH EXAMPLES |
| 262 |
|
To convert two hyperspectral inputs to RGB color space, |
| 263 |
|
average them together, and write them out as a RADIANCE picture: |
