> Old automatic cutting machines used a line-following circuit to
> copy directly from a paper print

There are two options for me to try

One is the simple X-Y complete scan, recording even white space.
That method would be the easiest, if less elegant, to implement

The other is line following. I'm sure if I think about it I could come
up with a method to do that. As you can imagine, scroll patterns
can be quite detailed and there could be many isolated lines for
holes etc

Both obviously need a read head, which is the mission du jour

For the second method, line following, off the top of my head
I might start with X-Y scanning until black is detected. Record
its position and follow the line. On completion, return to the
recorded position and X-Y scan again until the next black
detection. Record its position and track the line, etc etc

But I don't see how you could do this without recording where
the read head has been, to avoid multiple follows of the same
same line and detect false starts with the X-Y scanning

My intention was to X-Y scan and bitmap the page into SRAM.
I've a tray of 512k x 8 SRAM doing nothing. At 500mm square
by 0.5mm step that's only 1M bits

Joe

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