🚀 go-pugleaf

psilsbee@ccwf.cc.utexas.edu (Peter Silsbee) writes:

>Yes, certainly, IF your images are created solely for humans to view, then 
>that is the best measure. Even so, it must be used with care. Perhaps
>one reason that it is distrusted is that it, unlike more "objective"
>measures, can be manipulated. I can lossily compress and reconstruct
>an image, and design a forced-choice experiment that will show that people
>can't tell the difference. If my application involves magnifying the image
>by a large factor to locate tiny details, then I've been dishonest. 

This is untrue. If the units are properly specified, i. e., visual angle
rather than size, etc., you can't manipulate the results.  The trouble is
not with psychophysics, but with people who don't know how to do it right.

Marc Green
Trent Universoty