DragonFly On-Line Manual Pages

makepr(1)              DragonFly General Commands Manual             makepr(1)

NAME
       makepr - create Primitive Rectangles in an image

SYNOPSIS
       makepr [-options] in_file out_file [ out_file2 ]

DESCRIPTION
       makepr reads a binary image and creates Primitive Rectangles.  The
       Primitive Rectangle is the rectangle whose width is a constant (column
       width).  See references for the detail of Primitive Rectangles.

       The file format of in_file is binary pbm(5).  The primitive rectangles
       are written on out_file and out_file2, whose file format are d4file(4)
       ordinally.  Each rectangle is denoted by a 4-tuple, the position of the
       left-top corner, the width, and the height of the rectangle.

       If the option -image is specified, the rectangle image is written on
       out_file.  The file format of out_file is binary pbm(5) in this case.

OPTIONS
       -or    Logical "OR" of black pixels is used at the creation of
              rectangles.  (This is default.)

       -and   Logical "AND" of black pixels is used at the creation of
              rectangles.

       -reverse
              Reverse black and white of the input image.

       -cwid N
              Set the width of Primitive Rectangles to N.  The default value
              is N=16.

       -image Create image file instead of rectangle file.

       -box   Fill the inside of rectangle by black. Use this option with
              -image.

       -vert  Create the vertical Primitive Rectangles instead of normal
              horizontal ones.

       -mvec  Create both horizontal and vertical Primitive Rectangles
              concurrently.  Horizontal and vertical rectangles are written on
              out_file and out_file2 respectively.

       -d8    Create 8-dimensional (8-tuple) file. (This is experimental.)

       -llim N
              Suppress writing Primitive Rectangles each of whose height is
              less than N. The default is N=1.

       -ulim N
              Suppress writing Primitive Rectangles each of whose height is
              more than N. The default is N=32767.

SEE ALSO
       pbm(5), d4file(4)

REFERENCES
       "Robust and Fast Text-line Extraction Using Local Linearity of the
       Text-line" by Hideaki Goto and Hirotomo Aso, Trans. IEICE (D-II),
       Vol.J78-D-II, No.3, pp.465-473, March 1995.  (In Japanese)

       Or its translated version,

       "Robust and Fast Text-line Extraction Using Local Linearity of the
       Text-line" by Hideaki Goto and Hirotomo Aso, Systems and Computers in
       Japan, Vol.26, No.13, pp.21-31, 1995, Scripta Technica, Inc.

AUTHOR
       Copyright (C) 1995-2009 Hideaki Goto

       http://www.imglab.org/

                                   June 2009                         makepr(1)