Manpage of CT
Section: User Commands (1)
Return to Main Contents
ct - CT reconstruction of one sinogram.
ct [OPTIONS...] <sinogram> <result>
The program reads pre-formed sinogram and reconstructs it.
Input image containing the sinogram.
Output reconstructed image.
Defaults to "reconstructed-<sinogram>".
- -C, --contrast=STRING
Type of the contrast presented in the sinogram. Must be one of the following strings (case insensitive):
A, ABS, ABSORPTION - for the absorption contrast
R, REF, REFRACTION - for the refraction contrast
P, PHS, PHASE - for the phase contrast
F, FLT, FILTERED - for the pre-filtered contrast
- -c, --center=FLOAT
Deviation of the rotation axis from the center of the sinogram.
Allows you to erase some minor artifacts in the reconstructed image which come from the inaccurate rotation position. In most real CT or TS experiments the rotation center of the sample is not exactly in the center of the recoded projection. Moreover, the rotation axis may be inclined from the vertical orientation. If the inclination of the rotation axis is noticeable for your desired spatial resolution then you should rotate the images before the actual reconstruction. You can do it in the batch using "mogrify" command from the ImageMagick package with the -rotate option.
- -f, --filter=STRING[:FLOAT]
Filtering window used in the CT.
Defaults to "RAMP".
Must be a string consisting of two parts (the second one is optional): the filter name and float parameter of the filter. The filter name can be one of the following (case insensitive):
Optional float value is required only if the filter is KAISER or GAUSS and represents the lpha parameter of the KAISER filter or igma parameter of the GAUSS filter. Description of the filtering functions and their graphs can be found in the html documentation.
- -r, --resolution=FLOAT
Pixel size (micron).
Size of the image pixel in microns. If not present, the program attempts to to calculate it from the image dpi.The value is required only to produce the physically correct output. If not set the results are qualitative rather than quantitative.
- -t, --threads=UINT
Number of threads used in calculations.
If the option is not used the optimal number is calculated automatically.
- -i, --int
Output image(s) as integer.
If this option is not set, the output format defaults to the 32-bit float-point TIFF (regardless of the extension). If it is set, the image format is derived from the output file extension (TIFF if the extension does not correspond to any format).
- -v, --verbose
- -?, --usage
Outputs brief usage message.
- -h, --help
Outputs help message.
When combined with the "-v|--verbose" option may output more detailed message.
ctas(1), ctas-bg(1), ctas-ct(1), ctas-ct-abs(1), ctas-ct-dei(1), ctas-ct-edei(1), ctas-ct-ipc(1), ctas-dei(1), ctas-edei(1), ctas-ipc(1), ctas-f2i(1), ctas-ff(1), ctas-sino(1), ctas-sino-abs(1), ctas-sino-dei(1), ctas-sino-ipc(1), ctas-ts(1), ctas-ct-line(1)
- Standard options.
- SEE ALSO:
This document was created by
using the manual pages.
Time: 06:49:20 GMT, July 29, 2010