On 04/12/2016 12:29, MikeS wrote:
"Jim Lesurf" wrote in message
...
In article , tony sayer

wrote:


Just found these, might be of interest to some here


Agreed, thanks!


http://www.keith-snook.info/wireless...ireless-world-
articles.html

They are! Alas, the first one I tried showed my some of the irritating
problems that get in the way of using such files as reliable scans of
original pages.

I tried various pdf software. The pages seem to be 'patchwork quilt'
reconstructions. This means it is almost impossible to know what rendering
dpi (if any!) would give a result which had no added degrading due to
rendering. And also gives no clue if the 'processing' done to clean up the
scan for getting a 'better' pdf by the creator has actually altered any
real details.


Not sure why you'd want to know, but:

PDF producer: Adobe Acrobat 9.55 Paper Capture Plug-in with ClearScan
Content creator: Adobe Acrobat 9.5.5

for the couple I looked at.

I realise some rendering / processing software does this to try and cut
down file size and 'look better'. But for archival/research purposes it
undermines confidence.


I've a bunch of old journals I need to scan. I was just going to use
'compact pdf' on the work copier. It gives a reasonable rendition,
perfectly legible, with decent file sizes. Is there some sort of
industry standard (that I clearly don't know about)?

However the content is certainly interesting. And tends to look better
than
the examples on the americanradiohistory site.

I picked one at random (Micro-controlled radio-code clock) and thought he
has done an excellent job for most interested parties. Scan looks good and
even has accurate OCR of the text I checked.


I'd agree. To the point that I don't think they are scans - at least the
ones I looked at. I'm sent print proofs for some editing that I do, and
they look to be of that order of quality. Maybe Jim's looking at a
couple of rogue examples?

--
Cheers, Rob