Humanist Discussion Group, Vol. 33, No. 85.
            Department of Digital Humanities, King's College London
                   Hosted by King's Digital Lab
                       www.dhhumanist.org
                Submit to: humanist@dhhumanist.org




        Date: 2019-06-12 09:29:09+00:00
        From: Dr. Hartmut Krech 
        Subject: Re: [Humanist] 33.74: how to improve many photos?

Hi Amir,

While there may be ready-made filters available, the outcome of your
processing will depend upon the quality of the original scans you are
working on. If the lighting conditions are the same, as in scanning,
batch processing will do the trick for you. Please find a brief
description of the workflow to follow here:
https://learn.zoner.com/the-batch-filter/
Have you considered reproducing your books with a digital camera and a
good macro lens? Photographic reproduction will not only be faster, but
you may also adjust some variables like light temperature etc. beforehand.

With halftone photos from printed books, you would slightly soften the
image to eliminate the moiré effect, then increase the overall contrast
by adjusting the white and black points, as you don't want to have a
photo of the paper surface, but of the information contained in the
original photo. A flat gradation curve will retain as many shades of the
original as possible. Adjust as neccessary and apply your custom-made
batch filter. Don't forget to backup your zero versions first.

Best regards,
Hartmut

Am 09.06.2019 um 07:17 schrieb Humanist:
> Humanist Discussion Group, Vol. 33, No. 74.
> Department of Digital Humanities, King's College London
> Hosted by King's Digital Lab
> www.dhhumanist.org
> Submit to: humanist@dhhumanist.org
>
>
>
>
> Date: 2019-06-07 06:06:11+00:00
> From: Amir Simantov 
> Subject: How to improve the quality of photos scanned from old books?
>
> Hi,
>
> I am wondering whether I can improve the quality of photos scanned
> from old
> books. The photos are printed in a poor quality paper, black and white,
> please see an example attached. I have many of them and I need them in
> order to display on a digital database of my client. Do you know how can I
> achieve it?
>
> I need some tool that will do it automatically, as there are many photos.
> Do it by hand with Photoshop one by one is neither cheap nor needed. Even
> slight improving will help.
>
> Thanks a lot!
>
> Amir



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