There are several requirements your system must meet to compile and run
OCRchie (NOTE: users of less than the complete package may not need to
meet all of the following requirements) .
You will need a standard C++ compiler with the usual
math, string, stdio, stdlib and
stdarg libraries to compile OCRchie. (g++ strongly recommended) X11, Tcl-7.4, Tk-4.0 and
TIFF libraries are also required (though Tk and X11 will not be needed
if the user interface is not being used).
Memory requirements for OCRchie are substantial. For a 2500x3000 pixel
TIF image (roughly an 8.5x11 inch page scanned at 300dpi), you will need
about 2 megabytes of free memory for the data structures (the image is
stored in a bitmap requiring 7.5 megabits, and a run-length-encoded structure
with varying space requirements) If your text has a small point size,
the required amount of memory can increase significantly. It
has yet to be determined how much memory the user interface requires.
There are no specific processor requirements, but processing the image
can take longer than 15 seconds for some operations, so of course, the
faster the processor the better. (I ran it on an HP 715/100 for my
test cases). For some processors the fonts that we used for the TCL/TK
user interface may not be available. Change the FONT and SMALLFONT
variables in new_ui.tcl if you have a problem with our fonts.
Operating System Requirements
OCRchie was written with a UNIX platform in mind. System functions
for file manipulation, memory allocation may differ on other platforms
and my need to be changed. Since the user interface is in Tcl/Tk and there
is currently no easy to use text alternative, UNIX/LINUX is highly recommended
Input Image Requirements
Input Images must be 2-level (black and white) TIFF files.
300dpi resolution is recommended. Images at 600dpi will
take very long to display and rotate. (min-is-black and
min-is-white formats both supported).