| pjrec(1) | Engineering | pjrec(1) |
NAME¶
pjrec - reconstruction from projections
SYNOPSIS¶
pjrec projection-file image-file nx-image ny-image [OPTIONS]
DESCRIPTION¶
pjrec takes projection data from raysum-fileP and produces an (IF) image file image-file, of size nx-image by ny-image pixels, containing the reconstructed image.
OPTIONS¶
pjrec accepts the following options, which control the reconstruction algorithm:
- --interp
- Interpolation method during backprojection
- --preinterpolate
- Preinterpolation factor (default = 1). Used only with frequency-based filtering
- --filter
- Filter name
- abs_bandlimit
- Abs * Bandlimiting (default)
- abs_sinc
- Abs * Sinc
- abs_cosine
- Abs * Cosine
- abs_hamming
- Abs * Hamming
- shepp
- Shepp-Logan
- bandlimit
- Bandlimiting
- sinc
- Sinc
- cosine
- Cosine
- triangle
- Triangle
- hamming
- Hamming
- --filter-method
- Filter method before backprojections
- convolution
- Spatial filtering (default)
- fourier
- Frequency filtering with discete fourier
- fourier_table
- Frequency filtering with table lookup fourier
- fft
- Fast Fourier Transform
- --zeropad n
- Set zeropad level (default = 0). set n to number of powers to two to pad
- --filter-generation
- Filter Generation mode
- direct
- Use direct filter in spatial or frequency domain (default)
- inverse_fourier
- Use inverse fourier transform of inverse filter
- --backproj
- Backprojection Method
- --filter-param
- Alpha level for Hamming filter
- --trace
- Set tracing to level:
AUTHORS¶
Kevin Rosenberg, M.D. <kevin@ctsim.org>
HISTORY¶
CTSim was begun in 1983 using MS-DOS and an EGA display adapter. In 1999 it was ported to GNU/Linux and later ported to Microsoft Windows.
SEE ALSO¶
ctsim(1) ctsimtext(1) if1(1) if2(1) ifinfo(1) linogram(1) phm2helix(1) phm2if(1) phm2pj(1) pj2if(1) pjHinterp(1) pjinfo(1)
| Kevin Rosenberg |