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ditto machine scans

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ditto machine scans ivan lópez 05 Feb 10:01
  ditto machine scans Vytautas P. 05 Feb 12:36
  ditto machine scans Harish Narayanan 05 Feb 17:00
ivan lópez
2006-02-05 10:01:11 UTC (almost 19 years ago)

ditto machine scans

hello!

I'm scanning two old magazines that were printed using a 'spirit duplicator', better known as a 'ditto machine'. The magazines are overall well preserved, but have faded badly in some parts, and some of my scans are coming out looking like this:

http://textzi.net/02.png http://textzi.net/04.png

Would any of you have any suggestions on how to go about restoring these images?

best,
ivan

Vytautas P.
2006-02-05 12:36:49 UTC (almost 19 years ago)

ditto machine scans

Guess it would be all hand work restoration.

On Sun, 05 Feb 2006 11:01:11 +0200, ivan lópez wrote:

http://textzi.net/02.png
http://textzi.net/04.png

Would any of you have any suggestions on how to go about restoring these images?

Harish Narayanan
2006-02-05 17:00:58 UTC (almost 19 years ago)

ditto machine scans

ivan lópez wrote:

I'm scanning two old magazines that were printed using a 'spirit duplicator', better known as a 'ditto machine'. The magazines are overall well preserved, but have faded badly in some parts, and some of my scans are coming out looking like this:

http://textzi.net/02.png http://textzi.net/04.png

Would any of you have any suggestions on how to go about restoring these images?

I played with them for a bit (not very carefully), and here is what I would suggest.

1. Reduce the noise in the images (using something like filters->enhance->despeckle)
2. Try to sharpen it a little because this usually ends up slightly blurred (using something like filters->enhance->unsharp mask) You need to play with steps 1 and 2 until you get something you're happy with.
3. I then tried to convert the image to a vector format, and I used autotrace for this. Here [
http://emphaticallystatic.org/blogimages/eldstripador.png ] is a sample of a zoomed section showing the sorts of results you can achieve. You can do much better if you take a bit more time coming up with the right values for the numerous settings and choices for denoising and sharpening.

Harish