[Milsurplus] History of radios

[J. Forster]

Robert W. Downs wrote:

> John,
>
> Having scanned 100's of manuals primarily for the purpose of reprinting, I
> must disagree about the use of gray scale for archiving text.  There is no
> information content to the background clutter that you get from yellowed
> original pages, nor is there any in how dark the print is.

I have one of yours. They are very nice.  You can raise the threashold a bit to
drop much of the clutter. I wonder if a light yellow filter might help also.

> Photos are another matter, of course, and the best results that I have learned
> how to achieve involve scanning the page twice, once for the text and once for
> the photo.  And then cutting and pasting the photo onto the text page.
> Minimum file size with no loss of quality in the photo.  Time consuming,
> though.

That's the reason for scanning everything at 600 dpi. The cut and paste is too
time consuming for a onesie. You need 4 to 9 pixels per half-tone dot so as not
to loose info. 20 8 1/2 x 11 pages go on one CD. That's about the cost of a
xerox. This method is not perfect, but does work well.

-John