How To Delete Camera Profile In Aftershot

Bibble v and Aftershot Pro have a useful lens correction function that will fix the distortion created by a camera lens when a photo is taken. Y'all won't even recognise the distortion unless you're looking for information technology but quite often information technology can look similar straight lines are slightly bent or bulging.

The animated gif to a higher place shows you what that distortion looks like in my favourite zoom lens, the Sigma 18-200mm DC. The middle of the epitome is clearly bulging out. The lesser of the sign isn't straight but after correction information technology's much better.

Unfortunately not every lens is supported. In the lens correction widget of Aftershot Pro you'll see an "Uncalibrated Lens" message if your lens isn't there.

Bibble 4 supported this lens and I only realised today that a problems in Bibble five and Aftershot identified the lens incorrectly and led me on a merry dance across the Net. Bibble 5 and Aftershot Pro think my lens is the "Sigma xviii-200mm DC OS" but my lens doesn't accept an Optical Stabilizer! Bibble 4 probably detected the lens correctly.

Unfortunately for me there'south no mention of "Sigma xviii-200mm DC" in the "Catechism Lens Table" or profile_canonlenstable.txt. Only the Bone lens is mentioned and I presume the non Bone lens was removed in Bibble 5 by fault. Once I added an entry for my lens and added settings for the Os lens everything worked ok once again.

Anyway, cheers to this ASP forum post and this Bibble forum post I was able to add my lens to Aftershot Pro. The overnice thing about the lens database is that it is composed of text files that are easy to edit. I found a bones uncalibrated entry for the non OS lens. Unfortunately I didn't search further or I'd accept institute the "Sigma 18-200mm DC" settings I wanted and saved myself some fourth dimension! I created a new file chosen profile_mylenses.txt and added that filename to contour.txt.

Get-go of all, I had to find the lens correction parameters that would set things. The Bibble 5 postal service above links to sites that will help you figure out the right a, b and c coefficients but thankfully I didn't have far to wait to find working figures.

I checked out PTLens first. Information technology's a programme that corrects lots of different lens distortions and it's reasonably priced at Usa$25 per license. The author has shrewdly kept his lens baloney database in a secret format so I had to continue looking.

I and then establish LensFun, an open up source tool to do much the same matter only using an older version of the PTLens database. The source is available and then I went earthworks and found this interesting file! All the info I needed in one XML file!

All that remained to do was edit profile_mylenses.txt. In Windows and Linux the file can be placed in the following locations respectively. Mac Os X is probably in "Awarding Back up" or somewhere obvious similar that. In Windows you'll want to employ WordPad as the other contour files don't have Windows line endings. You'll besides have to open it equally an administrator to edit information technology.

C:\Plan Files (x86)\Corel\Corel AfterShot Pro\supportfiles\Profiles\LensProfiles\
/opt/AfterShotPro/supportfiles/Profiles/LensProfiles/

After some editing and experimenting I found that these settings worked well:

begin lens
group: genericSLR
multiplier: i.6
aperture: iii.5
menu_lens: Sigma 18-200mm f/iii.five-6.iii DC OS
cal_abc: eighteen 0.018238 -0.045992 0.000000
cal_abc: 21 0.013683 -0.026594 0.000000
cal_abc: 24 0.007113 -0.008911 0.000000
cal_abc: 33 0.000000 0.010791 0.000000
cal_abc: 59 0.000000 0.012006 0.000000
cal_abc: 88 0.000000 0.010958 0.000000
cal_abc: 144 0.000000 0.008752 0.000000
cal_abc: 200 0.000000 0.007390 0.000000
end

I had to restart Aftershot Pro to test new settings each time.

If editing files like that puts you off you lot can create a preset to utilise the lens correction. Click on the Manual tab in the Lens Correction widget where y'all can enter the a, b and c coefficients. At present go to the Presets widget and follow the instructions in my HOWTO: Add a copyright notice in Aftershot Pro tutorial except you'll desire the Lens Correction office to be active.

I doubtable that these changes will be overwritten whenever I upgrade Aftershot Pro but mayhap Corel will detect this little post of mine and they'll set up the detection, or duplicate the settings in the next version..

While writing this post I establish entries for the "Sigma 18-200mm f/3.5-half dozen.3 DC" lens in profile_genericSLR.txt. Because the programme misidentified my lens it never used those settings. The 1.five multiplier settings accept the same settings as in a higher place, the 1.6 multiplier one is slightly different just there'south not much difference when practical to my examination image.
Let that be a lesson to you if y'all're trying to get this work. Look harder for an existing profile and make sure your lens is identified correctly! Argh!

Source: https://inphotos.org/2012/03/15/adventures-adding-a-new-lens-to-aftershot-pro/

Posted by: goblerespense.blogspot.com