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photo touch up advice

Discussion in 'CycleChat Cafe' started by abchandler, 12 Feb 2008.

  1. abchandler

    abchandler Senior Member

    Location:
    Worcs, UK
    I have an old family photo, a portion of which i have scanned in and uploaded as my avatar. The printing of it includes a matrix of dots, which I'd like to erase from the original. Any advice on how to go about it?
     
  2. simonali

    simonali Über Member

    Location:
    Wiltshire
    Does your scanner have a descreen function? I don't know what that is, but makes better photo scans on my one!
     
  3. alecstilleyedye

    alecstilleyedye nothing in moderation Staff Member

    if you have photoshop (or poss. photoshop elements (way cheaper)), you could use the despeckle filter.
     
  4. abchandler

    abchandler Senior Member

    Location:
    Worcs, UK
    I've tried despeckle in Paint Shop Pro, but to no effect. I'll see if I can give photoshop a go
     
  5. simonali

    simonali Über Member

    Location:
    Wiltshire
    Do it at the scanner end as I suggested, rather than muck around with it afterwards, you'll get much better results!

    Descreen or anti moire filter will remove any artefacts that look like your avatar.
     
  6. Fnaar

    Fnaar Smutmaster General

    Location:
    Thumberland
    I think it looks quite "pop art" with the dots.... ;)
    May we ask which portion of the photo it is? My money's on someone's kneecap (what a strange sentence) :laugh:
     
  7. simonali

    simonali Über Member

    Location:
    Wiltshire
    Look at these 2 scans from my scanner, the first a normal scan and the second with descreen activated. See the difference? (look at the blue shading if you can't see what I mean)

    2113vhv.jpg

    2yueo03.jpg
     
  8. abchandler

    abchandler Senior Member

    Location:
    Worcs, UK
    Move your money off their kneecap, and put it on their chin and right shoulder:smile:
     
  9. alecstilleyedye

    alecstilleyedye nothing in moderation Staff Member

    quality cd simonali ;)
     
  10. abchandler

    abchandler Senior Member

    Location:
    Worcs, UK
    I'll see if my scanner allows it. Is the mottling present on the original artwork in this case?
     
  11. alecstilleyedye

    alecstilleyedye nothing in moderation Staff Member

    it will be, as most full colour printing is made up of cyan, magenta, yellow and black (cmyk) which is printed on as millions of tiny dots.

    only on spot colour, or any of the four cmyk colours, will the screen not be apparent.
     
  12. abchandler

    abchandler Senior Member

    Location:
    Worcs, UK
    a quick google on descreen and paint shop pro brought me to the following advice:

    increase the resolution, apply gaussian blur then reduce to original size.

    I've applied the Equalize histogram function and the before and after are now shown. Cheers guys (esp. simonali)
     
  13. abchandler

    abchandler Senior Member

    Location:
    Worcs, UK
    Ok so the next question is how long do I leave my avatar as it is so that this thread makes any kind of sense!!