Scanning a gigantic schematic

joeyoravec

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Tried it for the first time tonight:

- Do it at 300dpi panel-by-panel, overlapping a little bit each time
- Rotate the panels to be straight
- Then run Autostitch (link)

Worked pretty amazing at creating a single, big image from like 4 individual scans.
 
Or you can go to Fedex Office and they will scan it in one pass and put it a cd for you for about $10.

ken
 
Since most schematics are lineart, the best way would be to scan it in as such at 1200 dpi. Scanning it in as greyscale at 300dpi will yield a larger file size.
 
Since most schematics are lineart, the best way would be to scan it in as such at 1200 dpi. Scanning it in as greyscale at 300dpi will yield a larger file size.
Looking at xmission the average PDF (randomly chosen Bally Midway folder) is around 1 MB and lineart. Last night I scanned 300dpi color and the file was under 10 MB. Yeah it was bigger but it also contained a lot more detail, and 10 MB isn't very big these days.

Lots of these schematics are in poor condition and have soft edges from the bleeding ink. Even when I crank up the resolution, the scanner is looking at grey trying to decide if each pixel is on or off. Here's an example from xmission:

attachment.php


That's readable but it would help to see the grey area to see how things are rounded off. I still have to squint and decide if that's a 13 or an 8.
 

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