[thelist] [Photoshop] Simulating Bad Vision

[Joshua Olson]

> -----Original Message-----
> From: thelist at cjmarsh.com
> Sent: Sunday, June 12, 2005 3:50 PM

> I haven't tried this, but would you get the desired effect by 
> converting
> the image to a negative reresentation, applying Gaussian blur and then
> converting it back to a positive representation?

hi Chris,

I don't see how that would be any different than applying a gaussian blur
without the footwork of the negation.

I think I found at least a few words to describe the effect.

Bad vision is like the bright areas are exploding (bluring as it were) and
the dark areas are then overtaken by the bright areas.  This text, such as
times roman, kindly disappears from the background.  Highlights on pictures
become more pronounced than dark areas and all the detail fades away.  All
the blurring routines I've seen tend to uniformly blur light and dark areas.

I was trying to come up with a graphical way to demonstrate this for a
website dealing with vision, but I'm not sure if it'll be possible.

Thanks,

<><><><><><><><><><>
Joshua L. Olson
WAE Tech Inc.
http://www.waetech.com/
Phone: 706.210.0168 

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