Comments on: Photo scan spots

Question: Photo scan spots

maxg94 — Mon, 26 May 2008 18:19:34 -0800

Why does my photo scanner show images with "white flecks" all over them?

I am working on a slideshow and need to scan older photos in order to incorporate them. I had an ancient Epson flatbed that worked great for over 10 years, but decided to get a new 3 in 1 scan, copy, print machine. I bought a HP Photosmart 4280. Even though I have cleaned the glass and the prints, every time I scan it looks like it is snowing in the picture with lots of white dots everywhere.

Sadly, I can't return it as I had it too long before I actually tried the scanner part (dumb!). I spent several hours with a tech on the phone with no results. He promised to send a new one but then disconnected me.

Is there anything anyone knows that could be causing this? Obviously I can try with HP again, but thought I would see what you all have to say.

By: MegoSteve

MegoSteve — Mon, 26 May 2008 18:35:49 -0800

It could be dust inside the scanner. Can you see anything on the glass when you hold it up to the light?

By: CKmtl

CKmtl — Mon, 26 May 2008 18:46:42 -0800

Have you tried scanning something else to see if the snowiness only occurs with the old photos?

By: maxg94

maxg94 — Mon, 26 May 2008 18:52:52 -0800

I don't see anything on the glass itself, like dust or smudges.
I scanned some newly printed photos and they get snowiness as well.

By: CKmtl

CKmtl — Mon, 26 May 2008 19:01:13 -0800

Are they matte prints? Google magic turned this up.

By: QueSeraSera

QueSeraSera — Mon, 26 May 2008 19:24:24 -0800

I AAScannerTechie but INYST... if it's not due to scanning matte prints like CKmtl said, it's probably dust on the CCD or one of the mirrors inside. Take it up with HP.
/says the HP rival, ahaha

By: Lazlo

Lazlo — Mon, 26 May 2008 19:39:28 -0800

Dust on the CCD or mirrors will usually show up as streaks, not flecks.

Got any sample images?

By: cmiller

cmiller — Mon, 26 May 2008 19:53:41 -0800

Is it a grain aliasing problem?

By: jeremias

jeremias — Mon, 26 May 2008 20:03:19 -0800

Are you scanning using the scanner software? I know that HP's software puts auto-sharpening on by default, which can sometimes result in exaggerated speckles/flecks. You can turn this off in the preferences, but it sounds like your problem is a little bit more exaggerated.

By: gjc

gjc — Tue, 27 May 2008 05:43:11 -0800

Scan two different things with the exact same settings. Are the flecks in the same places on both scans?

(Indeed, dust on the ccd will cause streaks, not flecks.)

I am seconding the request for a sample image...

By: maxg94

maxg94 — Tue, 27 May 2008 07:35:54 -0800

These older photos all seem to be matte prints, so maybe that is the issue. I will also try to scan two different things with the same settings to see what shows up. I am at work without access for now, but these ideas are helpful. Thanks.

By: hap_hazard

hap_hazard — Tue, 27 May 2008 15:25:46 -0800

I've recently started using an HP officejet all-in-one scanner for some photos, and I was having the same problem, white blotches everywhere that look like dust.

I eventually figured out that I have to scan *everything* in 48-bit, because absolutely none of other options work at all. (for the one I have at least, you have to use a different softare frontend to do this, which is a pain.)

Apparently, the down-sampling the scanner does to get from 48 to 24 bit, no matter how high you set the DPI, causes this artifacting. At 48-bit though, everything looks great.

(I don't have Photoshop, or apparently any other software that handles 48 bit images, so now I have to figure out how to process the ones I have. They come out looking pristine, but not the same- I don't know if there's a luminosity setting, or if it's contrast, or what I have to change. Maybe I should do an askme about that.)

By: marble

marble — Tue, 27 May 2008 18:17:15 -0800

I have had this problem as well with an HP scanner. To the point that it's been sitting in the closet for a couple/few years, unused. I think I'm going to try hap_hazard's suggestion and see if that helps. Thanks!