Digital BW, The Print

I don't know about the precision of the old measurements (however
psychophysics from the turn of the century was typically very good);
however, there is no reason to believe that binocular vision would offer a
large advantage over monocular vision in two point determination.
Definitely not more than 5% unless the signal is severely degraded...which
these are not.

Robert (this time wearing my Cognitive Psychologist hat).



Binocular vision (two eye vision) gives one

On 10/10/01 12:06 PM, "Burkhardt Kiegeland" <burkhardt@...>
wrote:

> Please allow me to jump in this way...
> 
> Those »generally accepted 5lp/mm limit of the human eye« simply is a myth.
> These measures were taken more than 100 years in the past testing just one
> (!) 
> human eye watching a resting object. They found a resp of about 9lp/mm this
> way. 
> 
> I do not intend to blame people familiar to look one-eyed at artwork -
> please forgive my being a bit ironically- but there actually exists the
> option to use one´s both eyes for the same purpose. And there is a
> big difference then. Resolution is very much higher, and it is enhanced in
> addition by the constant scanning movements of the eyes called »tremor«.
> 
> The astronaut´s eyes are capable of discriminating trucks on the highways by
> looking down from the orbit. This is possible only with a resp of more than
> 100 lp/mm of their human eyes.
> A traditional photographer easily can discriminate between the resolution of
> a paper for enlargements (ca.25lp/mm) and a contact paper like AZO
> (ca.40lp/mm).
> When you have doubts - there is scientific literature available on this
> issue.
> 
> Like the human ear the human eye too can be made awaken and sharpened or
> sent into sleep. As a teacher in Europe of workshops on both the digital and
> the traditional fine print I am well aware about the differences. There are
> beautiful prints possible using the inkjet but you can´t compare them with a
> contact print from a large format negative on silver - this would be like
> comparing apples with pears. There are simply different aestetics involved.
> The hype however on going digital in my ears sometimes sounds like people
> being happy to become blind.
> 
> My equipment is two Epson Photo 1200 (both with the MIS continouus inks
> system) and a Color 3000. The inks are the MIS Quadtones and the Triton
> system of the European Ink Company which give results as good as the best
> Piezography prints by being much lower in price.
> 
> Thank you for listening
> 
> Burkhardt Kiegeland
> 
> www.lotusviewcamera.at
> 
> 
> 
> 
> 
> 
> 
> 
>       Paul Roarke wrote
> 
> snip...
> At the 360 dpi level there would be no separation of the 14.4lp/mm lines at
> all.  (By the way, my standard file resolution is 360 dpi
> because it can readily resolve 7.2 lp/mm, which is more than the
>    generally-accepted 5 lp/mm limit of the human eye.
> 
> snip... 
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> Please visit the Group Homepage to check the Files, Bookmarks, Polls and other
> resources as they are often being updated. The page is at:
> 
> http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint
> 
> Please follow these basic guidelines:
> - Include your full name with your message.
> - Include the address of your website, if you have one.
> - As threads develop, trim off excess portions of earlier messages to keep
> them short.
> - As the topic of a thread changes remember to change the subject header.
> - Good manners are required at all time. No personal attacks or "flames."
> - Complete your Yahoo profile.
> - Before posting a question, search the message archives and the various
> resources on the homepage.
> 
> 
> 
> 
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
> 
> 

----------------------
Robert Morrison
rmorrison@...

310-397-2704

4131 Bledsoe Ave.
Los Angeles, CA 90066