Image algebra
sqrt_4dfp
\(\sqrt{A}\)
Examples:
sqrt_4dfp vce20_mpr
Options
-@<b|l> |
output big or little endian (default input endian) |
-E |
output undefined voxels as 1.0e-37 (default 0.0) |
N.B.: default output filename = <image>_sqrt
scale_4dfp
m*A + b
Usage: scale_4dfp <image_4dfp> <scale_factor> [options]
Examples:
scale_4dfp b2_xfrm_avg 12
scale_4dfp b2_xfrm_avg 12 -b5 -ax12+5
Options
-E |
preserve 1.0e-37 values (fidl NaN convention) |
-a<str> |
append trailer to output file name |
-b<flt> |
add specified constant to each voxel |
-@<b|l> |
output big or little endian (default input endian) |
N.B.: <image_4dfp> is overwritten unless the trailer option is used N.B.: <scale_factor> must be specified for proper operation
imgopr_4dfp
A+B, A-B, A*B, A/B, various special operations
Usage: imgopr_4dfp -<operation><(4dfp) outroot> <(4dfp) image1> <(4dfp) image2> …
Operations
a |
add |
s |
subtract (image1 - image2) |
p |
product |
r |
ratio (image1 / image2) |
e |
mean (expectation) |
v |
variance |
g |
geometric mean |
n |
count defined (see -u option) voxels |
x |
voxelwize maximum |
y |
voxelwize minimum |
G |
report serial number (counting from 1) of image with greatest value |
P |
unsplit multiple ROIs into fidl compatible ROI file |
Options
-u |
count only defined (not NaN or 1.e-37 or 0.0) voxels |
-R |
suppress creation of rec file |
-N |
output undefined voxels as NaN |
-Z |
output undefined voxels as 0 |
-E |
output undefined voxels as 1.E-37 (default) |
-c<flt> |
multiply output by specified scaling factor |
-l<lst> |
read input file names from specified list file |
-@<b|l> |
output big or little endian (default first input endian) |
N.B.: image dimensions must match except for binary operations {aspr} in which a 1 volume second image may be paired with a multi-volume first image