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Finding Sensor Dust Spots Using Photoshop  
User currently offlineJayDavis From United States, joined Jan 2001, 1989 posts, RR: 24
Posted (3 years 8 months 2 weeks ago) and read 844 times:

I "tried" finding a similar thread on this subject but either I've used the wrong words for the search or there really isn't a thread on this subject.

I had recently some major sensor dust spots on my EOS 1D Mark II. Now granted, I could see some of them when I was working on the image in Photoshop, yet I couldn't see some of them when I uploaded some shots and they were rejected due to dust spots.

How do you use Adobe Photoshop CS2, to find sensor dust spots? Any particular work flow, or action, filter, etc.....???

Thanks!



Jay

18 replies: All unread, jump to last
 
User currently offlineJumboJim747 From Australia, joined Oct 2004, 2383 posts, RR: 55
Reply 1, posted (3 years 8 months 2 weeks ago) and read 839 times:
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Jay you can equalize the image they will stand .
Go to Image ,Adjustment ,Equalize
hope that helps


Family is the most important thing in the world
User currently offlineJeffM From United States, joined May 2005, 3247 posts, RR: 58
Reply 2, posted (3 years 8 months 2 weeks ago) and read 839 times:

Quoting JayDavis (Thread starter):
How do you use Adobe Photoshop CS2, to find sensor dust spots?

Easy. Equalize!

User currently offlinePtrjong From Netherlands, joined Mar 2005, 3009 posts, RR: 22
Reply 3, posted (3 years 8 months 2 weeks ago) and read 830 times:

Note that you have to shift back to the normal view to clone the bastards out - you basically can't do that in Equalize view although there is a way around this.

It's all described in detail in Fergul's workflow which is linked to from the upload pages I think. You should probably digest the whole document.

Peter


The only difference between me and a madman is that I am not mad (Salvador Dali)
User currently offlineJayDavis From United States, joined Jan 2001, 1989 posts, RR: 24
Reply 4, posted (3 years 8 months 1 week 6 days 23 hours ago) and read 824 times:

Well I looked for the thread and I got no reply...........

http://www.airliners.net/addphotos/PsProc.pdf

User currently offlinePtrjong From Netherlands, joined Mar 2005, 3009 posts, RR: 22
Reply 5, posted (3 years 8 months 1 week 6 days 23 hours ago) and read 822 times:

Works fine for me, do you have Adobe Reader installed?


The only difference between me and a madman is that I am not mad (Salvador Dali)
User currently offlineJayDavis From United States, joined Jan 2001, 1989 posts, RR: 24
Reply 6, posted (3 years 8 months 1 week 6 days 22 hours ago) and read 802 times:

I guess not.

I have everything else, it seems of Adobe software.

When I click on that link, it just acts like it is a "bad" url and it won't
open a website page.

User currently offlineRuudOnline From Netherlands, joined Feb 2006, 80 posts, RR: 0
Reply 7, posted (3 years 8 months 1 week 6 days 17 hours ago) and read 773 times:

You can also increase the contrast and decrease the lightness.

You can see them even better when you 'move' the photo on your screen.

Ruud

User currently offlineGranite From United Kingdom (Scotland), joined May 1999, 5364 posts, RR: 76
Reply 8, posted (3 years 8 months 1 week 6 days 15 hours ago) and read 750 times:
AIRLINERS.NET CREW
PHOTO SCREENER

Hi all

As Ruud mentioned, moving the image left/right quickly can spot them. Obviously this only works if the image is bigger than your screen.

This is one of the processes I use when screening.

Regards

Gary


Airliners.net
User currently offlineTimdeGroot From Netherlands, joined Apr 2002, 3639 posts, RR: 77
Reply 9, posted (3 years 8 months 1 week 6 days 14 hours ago) and read 733 times:
AIRLINERS.NET CREW
PHOTO SCREENER

An action to remove dustspots will be presented in the new rejection messages that I'm working on, hopefully this will help many people get rid of dustspots and thus reduce rejections.

Tim


Alderman Exit
User currently offlineJayDavis From United States, joined Jan 2001, 1989 posts, RR: 24
Reply 10, posted (3 years 8 months 1 week 6 days 8 hours ago) and read 687 times:

Tim,

Are you saying that you and/or someone else on A.net is making a Photoshop action to help us reduce and eliminate the sensor dust spots? That would be great.

Speaking of that, out of curiousity, are there any actions that users of Photoshop are currently using in order to process their images for better acceptance on this site? Would be curious to see what actions are out there for useage.



Jay

User currently offlineTimdeGroot From Netherlands, joined Apr 2002, 3639 posts, RR: 77
Reply 11, posted (3 years 8 months 1 week 6 days 8 hours ago) and read 677 times:
AIRLINERS.NET CREW
PHOTO SCREENER

Jay I shouldn't have said action, but there is a to eliminate dustspots by going through a few simple steps.

Tim


Alderman Exit
User currently offlineTimdeGroot From Netherlands, joined Apr 2002, 3639 posts, RR: 77
Reply 12, posted (3 years 8 months 1 week 6 days 8 hours ago) and read 674 times:
AIRLINERS.NET CREW
PHOTO SCREENER

Ok and here it is Smile

-Create a “Duplicate Layer
-Equalize the image. Image->Adjustments->Equalize
-Dustspots should now become visible. Now select the original layer (called background) to work on. Use the “clone stamp tool” or if you have Photoshop CS2 the “spot healing brush tool” and remove all dustspots.
-Delete the layer “background copy” (which we created earlier”
-You should now have an image free of dustspots.


Alderman Exit
User currently offlineFlyingZacko From Germany, joined May 2005, 575 posts, RR: 8
Reply 13, posted (3 years 8 months 1 week 6 days 7 hours ago) and read 667 times:

I don't see how an action should work here anyways. How would it find the dustpots?

Cheers,
Sebastian


Canon 40D + 24-70 f/2.8 L + 70-200 f/4 L + Speedlite 430EX
User currently offlineGranite From United Kingdom (Scotland), joined May 1999, 5364 posts, RR: 76
Reply 14, posted (3 years 8 months 1 week 6 days 7 hours ago) and read 646 times:
AIRLINERS.NET CREW
PHOTO SCREENER

Hi all

No action to eliminate dustspots will ever become available.

Photographer 'pre-screening' is required for this. I know it's a pain in the ass but one of those things that digital photographers need to do now.

Always 'standard' to sharpen an image. Now it's 'standard' to check for dust spots.

Until The Boss rules out dust spot rejections we will all have to check  Smile

Regards

Gary


Airliners.net
User currently offlineEDDL From Germany, joined Dec 2002, 733 posts, RR: 30
Reply 15, posted (3 years 8 months 1 week 6 days 6 hours ago) and read 638 times:
AIRLINERS.NET CREW
DATABASE EDITOR

Just keep your sensors clean. I don't want to bother with dust spots, it's annoying and time-consuming. I keep my sensor spotless and enjoy doing other things while you are playing with your cloning tool.  wave 

 Wink

Phil / EDDL


EDDL Photography
User currently offlineWalter2222 From Belgium, joined Sep 2005, 1125 posts, RR: 39
Reply 16, posted (3 years 8 months 1 week 6 days 2 hours ago) and read 596 times:

Quoting EDDL (Reply 15):
Just keep your sensors clean.

Living on mother "earth", it's not always possible to keep the sensor clean (although that would be ideal...), certainly if you change lenses very often! It's of course better to prevent (cleaning the sensor) than remedy afterwards (using Photoshop). I check by just shooting a picture with high aperture number (i.e. small aperture) of the blue sky and then - if there are any dust particles on the sensor - the dust spots show up (equalizing is then in most cases not even necessary). If several show up, then it is cleaning time!! I have done it already several times myself, and it is not that difficult (I use a special fibre-brush from "Visibledust", called the "Artic Butterfly").

Best regards,

Walter


canon 340d ;-) - efs18-55mm - ef28-105mm f3.5/4.5 - ef100-400mm f4.5-5.6l is usm - ...
User currently offlineJayDavis From United States, joined Jan 2001, 1989 posts, RR: 24
Reply 17, posted (3 years 8 months 1 week 5 days 23 hours ago) and read 584 times:

Thanks for all the tips/hints.

Still curious if there are any Photoshop actions that people use on this forum to work their photos ??

I know Colin Wok (I think that is his name) used to have some actions when digital was first introduced. Does he or others still have actions we can download somewhere?



Jay

User currently offlineJeffM From United States, joined May 2005, 3247 posts, RR: 58
Reply 18, posted (3 years 8 months 1 week 5 days 21 hours ago) and read 579 times:

Quoting JayDavis (Reply 17):
Still curious if there are any Photoshop actions that people use on this forum to work their photos ??

I make actions for almost everything.... Try these...

Using Actions/Masks...My Tutorial With Links! (by JeffM Aug 31 2005 in Aviation Photography)

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