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Resolution Problems  
User currently offlineHisham From Lebanon, joined Aug 1999, 701 posts, RR: 11
Posted (12 years 11 months 1 week 5 days 15 hours ago) and read 1330 times:

Hi,
I'm having problems of getting high resolution scans. Even with a 9000 DPI, they're still of much lower resolution than the prints. I tried to play with other parameters (Sharpening, contrast..). Nothing worked.
Any advise about increasing resolution?

Hisham.

13 replies: All unread, jump to last
 
User currently offlineGhost77 From Mexico, joined Mar 2000, 5236 posts, RR: 51
Reply 1, posted (12 years 11 months 1 week 5 days 15 hours ago) and read 1298 times:

Hisham,

Can you write the link to the picture(s) are you refering to.. so we can see and tell you maybe what´s wrong.. or help you out with the problem.

Ricardo  Smile APM



Ricardo Morales - flyAPM - ¡No es que maneje rapido, solo estoy volando lento!
User currently offlineCfalk From , joined Dec 1969, posts, RR:
Reply 2, posted (12 years 11 months 1 week 5 days 15 hours ago) and read 1294 times:

9000 dpi ?!?!?!?!


4000 dpi is typically the top end for slide scanners, and something like 1200 dpi for flatbeds.

Charles


User currently offlineAps From , joined Dec 1969, posts, RR:
Reply 3, posted (12 years 11 months 1 week 5 days 14 hours ago) and read 1279 times:

The last image he scanned was 2585mb  Nuts

seriously though there are scanners with that capability , but not very often used..


User currently offlineHisham From Lebanon, joined Aug 1999, 701 posts, RR: 11
Reply 4, posted (12 years 11 months 1 week 5 days 11 hours ago) and read 1262 times:

Yes the scanner has a 9600 DPI option. But the scan is a low res anyway. The scanner is a Umax Astra 1200S.
I can't upload the pic. But if you're willing to take a look at it, I can email it to you in a 116K jpg format. Send me an email to the address in my profile so I can write back.
Thank you.

Hisham.


User currently offlineJan Mogren From Sweden, joined exactly 14 years ago today! , 2043 posts, RR: 50
Reply 5, posted (12 years 11 months 1 week 5 days 11 hours ago) and read 1260 times:

That is interpolated, right?
/JM



AeroPresentation - Airline DVD's filmed in High Definition
User currently offlineHisham From Lebanon, joined Aug 1999, 701 posts, RR: 11
Reply 6, posted (12 years 11 months 1 week 5 days 10 hours ago) and read 1254 times:

What's interpolated?

Hisham.


User currently offlineJan Mogren From Sweden, joined exactly 14 years ago today! , 2043 posts, RR: 50
Reply 7, posted (12 years 11 months 1 week 5 days 10 hours ago) and read 1246 times:

That is when the software "makes up" pixels just to make the scan bigger. That would make your scan look "not so good".
/JM



AeroPresentation - Airline DVD's filmed in High Definition
User currently offlineHisham From Lebanon, joined Aug 1999, 701 posts, RR: 11
Reply 8, posted (12 years 11 months 1 week 5 days 10 hours ago) and read 1239 times:

Yeah, I see what you're saying. The problem is that even lower PDI's are nor working (200 or 800 DPI). So it could be that the scanner isn't good enough. How do you know the real resolution of a scanner?

Hisham.


User currently offlineLOT767-300ER From , joined Dec 1969, posts, RR:
Reply 9, posted (12 years 11 months 1 week 5 days 10 hours ago) and read 1232 times:

I have a Astra Net 5420 thats only 1200dpi max,

BTW the Astra 1200S has 600 optical dpi, interpolated dont count heheh


User currently offlineJan Mogren From Sweden, joined exactly 14 years ago today! , 2043 posts, RR: 50
Reply 10, posted (12 years 11 months 1 week 5 days 10 hours ago) and read 1232 times:

It should say Optical resolution somewhere in the manual.
/JM



AeroPresentation - Airline DVD's filmed in High Definition
User currently offlineCfalk From , joined Dec 1969, posts, RR:
Reply 11, posted (12 years 11 months 1 week 5 days 9 hours ago) and read 1227 times:

Using any resolution on prints higher than 600 dpi is overkill - as prints themselves are only printed at 300-400dpi anyway.

Charles


User currently offlineHisham From Lebanon, joined Aug 1999, 701 posts, RR: 11
Reply 12, posted (12 years 11 months 1 week 5 days 9 hours ago) and read 1223 times:

If the Astra 1200 has an optical resolution of 600 dpi and the print has a res of 400 dpi, then why is the res of the scan much worse than the print?

Thanks for the replies.

Hisham.


User currently offlineCfalk From , joined Dec 1969, posts, RR:
Reply 13, posted (12 years 11 months 1 week 5 days 9 hours ago) and read 1221 times:

Could it be that your scanner has a focus problem?

Charles


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