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lautry

Panama City Beach, US
121 posts

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lautry Silver Member Nikonian since 02nd Oct 2011
Thu 11-Oct-12 09:57 PM

I have attached a photo with missing pixels. They can be seem on zoom and appear as a series of white dots slightly below and to the left of the yellow buoy below the most significant rainbow. I have taken quite a few photos with this camera and never noticed missing pixels before. When I looked at the printed 8x10 I though there were white dust specks on the photo. They were easy enough to correct in PP, but what causes this phenomena?
Thanks
Larry

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Attachment#1 (jpg file)

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dm1dave

Lowden, US
13738 posts

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#1. "RE: Missing Pixels" | In response to Reply # 0

dm1dave Administrator Awarded for high level knowledge and skills in various areas, most notably in Wildlife and Landscape Writer Ribbon awarded for his excellent article contributions to the Nikonians community Donor Ribbon awarded for his very generous support to the Fundraising Campaign 2015 Nikonian since 12th Sep 2006
Thu 11-Oct-12 08:26 PM

Can you make a 100% crop of the area and post that so we can get a closer look at the spots?

Dave Summers
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lautry

Panama City Beach, US
121 posts

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#2. "RE: Missing Pixels" | In response to Reply # 1

lautry Silver Member Nikonian since 02nd Oct 2011
Thu 11-Oct-12 09:15 PM

Will do tomorrow pm.
Thanks

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kentak

US
952 posts

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#3. "RE: Missing Pixels" | In response to Reply # 0

kentak Silver Member Nikonian since 03rd Jul 2010
Sat 13-Oct-12 12:02 AM

Seagulls.

Kent

PAStime

Kingston, CA
2824 posts

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#4. "RE: Missing Pixels" | In response to Reply # 0

PAStime Silver Member Nikonian since 10th Feb 2009
Mon 15-Oct-12 01:39 AM

Hi Larry. At a glance these appear too irregularly shaped to be "missing pixels". Need a 100% crop to tell. I am thinking seagulls too. Peter

lautry

Panama City Beach, US
121 posts

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#5. "RE: Missing Pixels" | In response to Reply # 1

lautry Silver Member Nikonian since 02nd Oct 2011
Mon 15-Oct-12 12:36 PM

Here is a crop of the missing pixels. Sorry it took so long.
Larry

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Attachment#1 (jpg file)

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lautry

Panama City Beach, US
121 posts

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#6. "RE: Missing Pixels" | In response to Reply # 4

lautry Silver Member Nikonian since 02nd Oct 2011
Mon 15-Oct-12 12:39 PM

I really don't think they are seagulls, as the spots are square or rectangular when viewed under magnification.
Larry

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lautry

Panama City Beach, US
121 posts

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#7. "RE: Missing Pixels" | In response to Reply # 4

lautry Silver Member Nikonian since 02nd Oct 2011
Mon 15-Oct-12 01:31 PM

You know, on second and third thought you guys may be right about the seagull theory. At that distance, there may not have been enough pixel density in the camera sensor to define something as small as a seagull. The yellow buoy above the spots doesn't look that well defined under magnification either.
Larry

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km6xz

St Petersburg, RU
3571 posts

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#8. "RE: Missing Pixels" | In response to Reply # 7

km6xz Moderator Awarded for his in-depth knowledge in various areas, including Portraits and Urban Photography Nikonian since 22nd Jan 2009
Mon 15-Oct-12 02:33 PM

Seeing the crop my first impression was vertical axis motion blur of something on the water. Missing pixels are a lot smaller than these which are larger than features seen in the image. Could be seagulls or ??
If they were pixels, not only would they be tiny but they can be mapped out. You camera probably already has some dead pixels, just as your memory chips have dead cells which are mapped out in final testing.
Stan
St Petersburg Russia

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RLDubbya

US
553 posts

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#9. "RE: Missing Pixels" | In response to Reply # 8

RLDubbya Silver Member Nikonian since 24th Dec 2011
Mon 15-Oct-12 02:49 PM

What does the yellow buoy mark? The white shapes look to me like foam floaters for a net.

four eighty sparky

US
1653 posts

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#10. "RE: Missing Pixels" | In response to Reply # 5

four eighty sparky Registered since 08th Apr 2011
Mon 15-Oct-12 03:03 PM

If you truly had missing pixels, they would show up and individual pixels, not an entire group of pixels. And multiple groups of pixels at that.

There's just something floating in the water. Easy to clone out.

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J_Harris

US
781 posts

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#11. "RE: Missing Pixels" | In response to Reply # 9

J_Harris Silver Member Donor Ribbon awarded for his generous support to the Fundraising Campaign 2015 Awarded for his contribution to the Nikonians Articles section Nikonian since 29th Mar 2011
Mon 15-Oct-12 03:28 PM


>What does the yellow buoy mark? The white shapes look to me
>like foam floaters for a net.

Good call. The more I look at it the more your theory seems likely.

Jerry

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lautry

Panama City Beach, US
121 posts

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#12. "RE: Missing Pixels" | In response to Reply # 9

lautry Silver Member Nikonian since 02nd Oct 2011
Mon 15-Oct-12 05:31 PM

The yellow buoy, along with smaller white buoys are placed by beach vendors who rent jet skis. The jet skis have to stay beyond the buoys and away from people. Different vendors may have different colored buoys. Most buoys are white, but the specks in the pic are not buoys and not net floats, as this beach attracts many swimmers, nets and fishing attracts sharks and the two don't mix.
Larry

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kentak

US
952 posts

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#13. "RE: Missing Pixels" | In response to Reply # 12

kentak Silver Member Nikonian since 03rd Jul 2010
Mon 15-Oct-12 05:46 PM | edited Mon 15-Oct-12 08:26 PM by kentak

Plus, if that's near a swimming area, what fisherman wants the liability of having a swimmer tangled in his nets?

The important thing is, unless you're seeing these kinds of "spots" on other images, it's likely not camera/sensor related. When I originally posted "seagulls," a magnification of your first image seemed to show irregular white and gray pixels. Made me think of seagulls. The second crop you posted makes the spots look more uniform and regular, more like floats than birds. So, frankly, I'm at a loss to say with any certainty what they might be.

I would just fix the image if the spots are distracting and forget about it.

Kent

lautry

Panama City Beach, US
121 posts

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#14. "RE: Missing Pixels" | In response to Reply # 13

lautry Silver Member Nikonian since 02nd Oct 2011
Mon 15-Oct-12 06:17 PM

That's exactly what I have done. I PP'd the spots and I'm over it.
Thanks
Larry

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G