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Finding Sensor Dust Spots Using Photoshop  
User currently offlineJayDavis From United States of America, joined Jan 2001, 2000 posts, RR: 16
Posted (8 years 1 month 2 weeks 5 days 21 hours ago) and read 7477 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, 2464 posts, RR: 45
Reply 1, posted (8 years 1 month 2 weeks 5 days 21 hours ago) and read 7472 times:
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Jay you can equalize the image they will stand .
Go to Image ,Adjustment ,Equalize
hope that helps



On a wing and a prayer
User currently offlineJeffM From United States of America, joined May 2005, 3266 posts, RR: 52
Reply 2, posted (8 years 1 month 2 weeks 5 days 21 hours ago) and read 7472 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, 3884 posts, RR: 19
Reply 3, posted (8 years 1 month 2 weeks 5 days 21 hours ago) and read 7463 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 of America, joined Jan 2001, 2000 posts, RR: 16
Reply 4, posted (8 years 1 month 2 weeks 5 days 21 hours ago) and read 7457 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, 3884 posts, RR: 19
Reply 5, posted (8 years 1 month 2 weeks 5 days 21 hours ago) and read 7455 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 of America, joined Jan 2001, 2000 posts, RR: 16
Reply 6, posted (8 years 1 month 2 weeks 5 days 20 hours ago) and read 7435 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, 82 posts, RR: 0
Reply 7, posted (8 years 1 month 2 weeks 5 days 14 hours ago) and read 7406 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 UK - Scotland, joined May 1999, 5568 posts, RR: 64
Reply 8, posted (8 years 1 month 2 weeks 5 days 13 hours ago) and read 7383 times:
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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


User currently offlineTimdeGroot From Netherlands, joined Apr 2002, 3674 posts, RR: 65
Reply 9, posted (8 years 1 month 2 weeks 5 days 12 hours ago) and read 7366 times:
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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 of America, joined Jan 2001, 2000 posts, RR: 16
Reply 10, posted (8 years 1 month 2 weeks 5 days 6 hours ago) and read 7320 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, 3674 posts, RR: 65
Reply 11, posted (8 years 1 month 2 weeks 5 days 5 hours ago) and read 7310 times:
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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, 3674 posts, RR: 65
Reply 12, posted (8 years 1 month 2 weeks 5 days 5 hours ago) and read 7307 times:
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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, 583 posts, RR: 6
Reply 13, posted (8 years 1 month 2 weeks 5 days 5 hours ago) and read 7300 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 UK - Scotland, joined May 1999, 5568 posts, RR: 64
Reply 14, posted (8 years 1 month 2 weeks 5 days 4 hours ago) and read 7279 times:
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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


User currently offlineEDDL From Germany, joined Dec 2002, 738 posts, RR: 16
Reply 15, posted (8 years 1 month 2 weeks 5 days 4 hours ago) and read 7271 times:

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


User currently offlineWalter2222 From Belgium, joined Sep 2005, 1292 posts, RR: 29
Reply 16, posted (8 years 1 month 2 weeks 5 days ago) and read 7229 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 ;-) - EFS10-22mm f/3.5-4.5 USM - EFS18-55mm - EF28-105mm f3.5/4.5 - EF100-400mm f4.5-5.6l is usm - ...
User currently offlineJayDavis From United States of America, joined Jan 2001, 2000 posts, RR: 16
Reply 17, posted (8 years 1 month 2 weeks 4 days 21 hours ago) and read 7217 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 of America, joined May 2005, 3266 posts, RR: 52
Reply 18, posted (8 years 1 month 2 weeks 4 days 18 hours ago) and read 7212 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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