pjrec1

Usage

Overview

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