mrctaper(1) General Commands Manual mrctaper(1)
NAME
mrctaper - Tapers edges of images between actual and filled-in values
SYNOPSIS
mrctaper [-i] [-t #] [-z min,max] input_file [output_file]
DESCRIPTION
mrctaper will taper the edges between actual image data and areas that
have been filled in with a constant value, thus eliminating the sharp
transitions produced when images are transformed by programs such as
newstack or blendmont. By default, the program will taper out-
side the actual image data by replicating the pixels along the edge and
attenuating their intensity toward the filled-in value for pixels far-
ther from the edge. This makes the features on the edge of the area
appear smeared out into the filled-in area. This tapering will pre-
serve all of the actual data but may produce undesirable artifacts in
some cases. Optionally, the program can taper inside, by attenuating
the intensity of actual pixels toward the filled-in value and doing so
progressively less for pixels farther from the edge. This method will
throw away some information but will be most successful at preventing
artifacts in Fourier transforms.
OPTIONS
-i Taper inside rather than outside.
-t # Taper over the given number of pixels. The default value is 1%
of the mean of the X and Y sizes of the image, but at least 16
pixels and no more than 127.
-z min,max
Operate only on sections from min to max. Sections are numbered
from 0. If a new output file is being created, it will contain
only the sections from min to max in the input file.
FILES
If no output file name is given, the data are written back into the
input file.
AUTHOR
David Mastronarde <mast at colorado dot edu>
SEE ALSO
newstack, blendmont
IMOD 5.0.2 mrctaper(1)