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
nearest
Nearest neighbor interpolation
linear Linear interpolation
--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
trig Trigometric functions at every point
table Trigometric functions with precalculated table
diff Difference method
diff2 Optimized difference method (default)
idiff2 Optimized difference method with integer math
idiff3 Highly-optimized difference method with integer math
--filter-param
Alpha level for Hamming filter
--trace Set tracing to level:
none No tracing (default)
console Text level tracing
--verbose Turn on verbose mode
--debug Turn on debug mode
--version Print version
--help Print a terse help message
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)