Converting line-screen to continuous tone

D
Posted By
damonstokes2
Dec 1, 2003
Views
587
Replies
1
Status
Closed
Hi all,

This is my first post, so please excuse my ignorance if I should already know the answer to this question. I’m wondering if anyone can point me in the direction of some information on taking a heavy line screen image (like old newspaper photos) and modifying them to give the impression of continuous tone. I was hoping someone has alredy developed a method of doing this that gives at least passable results.

I’m working a bit in the dark ages with Photoshop 5.5, so if there are any wiz bang features in CS, unfortunately I can’t use them (at least until we upgrade system software and all the other software we use).

Hope someone can help. Thanks.

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W
Waldo
Dec 1, 2003
Search the web for "descreen" or "inverse halftoning".

A basic way of working could be:
– scan image at a high resolution
– apply gaussian blur that removes (most) of the dot pattern – resize to a much smaller size
– use unsharp mask

Waldo

"Ozdemon" wrote in message
Hi all,

This is my first post, so please excuse my ignorance if I should already know the answer to this question. I’m wondering if anyone can point me in the direction of some information on taking a heavy line screen image (like old newspaper photos) and modifying them to give the impression of continuous tone. I was hoping someone has alredy developed a method of doing this that gives at least passable results.
I’m working a bit in the dark ages with Photoshop 5.5, so if there are any wiz bang features in CS, unfortunately I can’t use them (at least until we upgrade system software and all the other software we use).
Hope someone can help. Thanks.

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