Provided by: jpegpixi_1.1.1-4ubuntu1_i386 bug

NAME

       jpeghotp  -  find  hot  or dead pixels in otherwise black or white JPEG
       images

SYNOPSIS

       jpeghotp [OPTION]... JPEG-FILE [PIXEL-BLOCKS-FILE]

DESCRIPTION

       Jpeghotp automatically finds hot pixels  in  an  otherwise  black  JPEG
       image (default) or dead pixels in an otherwise white JPEG image (if the
       --invert option is specified). The output is suitable as a pixel  block
       specification  file  for the jpegpixi(1) program. A typical application
       is to process an image taken with a digital camera with CCD defects.

       To obtain a black image, take a  picture  in  total  darkness  or  with
       covered lens. To obtain a while image, take an overexposed picture of a
       well-lit piece of white paper.

       JPEG-FILE is the filename of the JPEG image to read. It can be -, which
       refers to standard input.

       PIXEL-BLOCKS-FILE  is the name of the file to write the coordinates and
       sizes of the hot (or dead) pixel blocks  to.  If  it  is  omitted,  the
       coordinates and sizes are written to standard output.

OPTIONS

       -t THRESHOLD, --threshold=THRESHOLD
              Specify   the   threshold   between   noise  and  signal.  Pixel
              luminosities below  the  threshold  are  considered  CCD  noise,
              luminosities above are considered hot pixels.  THRESHOLD must be
              a number between 0 and 100 followed by a percent character  (%).
              The default is 10%.

       -i, --invert
              Invert the image. If this option is specified, dead pixels in an
              otherwise white image instead of  hot  pixels  in  an  otherwise
              black image are found.

       -c, --comments
              Output comments with the luminosities of the hot (or dead) pixel
              blocks.  This can be helpful in hand  tuning  the  pixel  blocks
              file.

       --help Display a short help text and exit immediately.

       --version
              Display version information and exit immediately.

BUGS

       Please report bugs to <martin-jpegpixi@zero-based.org>.

COPYRIGHT

       Copyright © 2003, 2004, 2005 Martin Dickopp

       Jpeghotp  is  free software; it may be copied and/or modified under the
       terms of the GNU General Public License version 2 or (at  your  option)
       any  later  version. There is NO warranty; not even for MERCHANTABILITY
       or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO

       jpegpixi(1)

       The jpegpixi homepage: http://www.zero-based.org/software/jpegpixi/