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DPI, Scanning and Printing
bu14-1 
9/7/08 11:17:25 AM
Charge

Hi all,

If I scan a good photo in at 300 DPI will that be good enough to print it again at the original size and look like the original (assuming the scanner and printer are good)? Can it be printed any bigger and look alright? What about @ 600 DPI?

Thanks.

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Master_Scythe 
9/7/08 12:56:59 PM
Titan

start at 600 minimum for photo reproduction.

300 will work, but you'll likely lose some of the finer detail.

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4200+X2 939, ASUS A8N-SLI-D, Ati HD3850, 1gb,1tb total HDD, 109 DVD, LG DVD-rom.
Quote by Girvo
I've got a wicked tiny one that is ridiculously sensitive.



Friml 
9/7/08 2:49:40 PM
Guru

Are you scanning from the film or from the print?

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Athiril 
9/7/08 3:12:04 PM
Titan

He's scanning from a print.

if its an inkjet print i wouldnt scan at 600 dpi...

do you have the original jpeg or film negative? that would be better to re-print from, but yeah you can print from a print, not quite 100%, scanner will introduce some softness, different colour etc, correction in photoshop would help that etc.

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Welcome to the eternal hell of my world, where it is Christmas, all year round.

Starring Jet Li as Santa Claus.

Friml 
9/7/08 3:47:49 PM
Guru

^^^ what he said.

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Athiril 
9/7/08 4:54:19 PM
Titan

Okay if you can do a 600 dpi scan, and not see white spaces in between colour dots at 100% view, than a 600 dpi scan will be good.

I would then use photoshop or another application and do some colour correction, put the colour back how its supposed to be, sharpen a little and do an unsharp mask with 250px radius, maybe 20% amount to put in some local contrast.

Then pull the size down by 50% for 300 dpi equivalent, but improved results.

That would be a suitable reprint hopefully.

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Welcome to the eternal hell of my world, where it is Christmas, all year round.

Starring Jet Li as Santa Claus.

bu14-1 
10/7/08 12:51:16 PM
Charge

Thanks for the replies.

I think I'll scan @ 600 DPI. Fortunately I haven't gone a LONG way to scanning all my photos in and I had to redo a lot of them anyway because some thing I used to convert the photos to jpeg files put some text on the photos because it was not registered.

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Master_Scythe 
10/7/08 1:09:16 PM
Titan

you can use paintshoppro to batch convert files.

If you're making jpegs, try not to go above level 10 compression. you'll start to notice SERIOUS artifacts.

(personally my max is 5, but space is cheap for me)


Edited by Master_Scythe: 10/7/2008 1:09:33 PM

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4200+X2 939, ASUS A8N-SLI-D, Ati HD3850, 1gb,1tb total HDD, 109 DVD, LG DVD-rom.
Quote by Girvo
I've got a wicked tiny one that is ridiculously sensitive.



bu14-1 
12/7/08 9:22:08 AM
Charge

Thanks mate, I'll give that a try.

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