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.TH MERGE 1 "Ultrasonics Laboratory"
.SH NAME
merge - Add two 128 x 128 Images together
.SH SYNOPSIS
merge pic1 pic2
.SH DESCRIPTION
This program reads two 128 x 128 pictures and
adds them together.
All input, output data and internal results
are eight bit numbers.
The two pictures to add are read
in from the files
.B pic1
and 
.B pic2.
The result is placed into the file 
.B pic
.SH FILES
.TP 8
pic
is the output file (128 x 128 eight bit pixels)
.SH DIAGNOSTICS
Error messages are printed for all errors in
opening files.
.SH BUGS
The two pixels are simply added.
No check is made to see if the
result fits properly into eight bits.