NAME

       g3data     —   A tool for extracting data from graphs.

SYNOPSIS

       g3data  [-max  x y]  [-scale factor]  [-coords llx lly rux ruy]  [-errors]  [-lnx]  [-lny]
       [filename(s) ...]

DESCRIPTION

       2001-01-01;

       g3data is a tool for  extracting  data  from  scanned  graphs.  For  graphs  published  in
       scientific  articles  the  actual  data is usually not explicitly given ; g3data makes the
       process of extracting this data easy.

OPTIONS

       -max x y  If picture is larger x-wise than x or y-wise than y, the picture is scaled  down
                 accordingly otherwise this parameter has no effect.

       -scale factor
                 Scales  the  picture size by factor. This parameter nullifies effect of the -max
                 parameter.

       -coords llx lly rux ruy
                 Preset the coordinates of the left lower (ll) corner and the  right  upper  (ru)
                 corner.

       -errors   Print  out  the  error  of  the  x value in column 3 and the error of y value in
                 column 4 of the output.

       -lnx      Use logarithmic scale for x coordinates.

       -lny      Use logarithmic scale for y coordinates.

       filename(s) ...
                 The filename(s) of the image(s) to open.  Supported  image  formats:  PNG,  XPM,
                 JPEG, TIFF, PNM, RAS, BMP and GIF.

USAGE

       g3data -scale 2 -errors test1.png

       g3data -scale 2 -lny -errors test2.png

BUGS

       None known.

AUTHOR

       Jonas  Frantz  jonas.frantz@welho.com

                                                                                    g3data    (1)