Re: [PPLetterpress] Re: correcting ink spread
- Hi Gerald,
As you say there is a bit more art than science
but the usual is: Amount
500%, radius about 1.2 pixels and threshold about
5. set the amount at 500
and then play with the radius, at some point you
will quickly see you will
get the optimal result. I don't know if this is
the best way, just what I
have discovered is best for me. I would
appreciate any feedback from others
in this regard.
The Artists' Press
Tel. +27 11 836 5474
fax. +27 11 836 6858
Thought I'd test this out with a something I would have found quite difficult.
I downloaded an image of one of Tycho's Brahe's astronomical instruments,
printed in the 16th century. This was a very colorful JPEG at 300 dpi. I
opened it in Photoshop, re-sampled to 600 dpi and converted it to a grayscale.
I ran your formula twice and converted the file to b/w bitmap while
re-sampling to 1200 dpi. I printed it out at 1200 dpi. Fell out of my chair.
Absolute clarity and as perfect a conversion of the blacks and whites as I
have ever seen. All in about five minutes of time!!!
You have found the Holy Grail my son. I get down on my knees to you.