auto correction of distortion

Helicon Filter: Want new feature? Suggest it here

Moderator: Stas Yatsenko

Ludwig
Posts: 7
Joined: 30.04.2007 02:27

auto correction of distortion

Unread postby Ludwig » 30.04.2007 02:52

Wouldn't it be great to have a function for automated correction of lens distortions (and possibly vignetting) in Helicon filter? I would love to have such a function because it would eliminate under and over corrections of distortion and would speed up work.

The type of the lens, used zoom factor etc. could be read from the EXIF header. Absolute numbers of lens distortions are known for many lenses (e.g. www.photozone.de) and could be easily (?) adjusted by the software. You would need to create a database of lens distortions or even leave that to the users.

However, it might be, that things are more complicated than I believe. Your feedback would be very welcome.

Regards

Ludwig

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Ariel
Posts: 395
Joined: 26.10.2006 06:05

Unread postby Ariel » 30.04.2007 20:24

Maybe if you have a camera and all the info in the exif (lens type, what about extenders and add-on lenses?), it would be kind of cool to see this feature.

lutz
Posts: 155
Joined: 14.04.2006 02:51

two very helpful apps

Unread postby lutz » 01.05.2007 21:54

Two very helpful apps:

PTLens:
http://epaperpress.com/ptlens/
works as standalone and plug-in and does exactly what you suggest. I have no tried it, plugged-in into Helicon Filter, however; very cheap.


ShiftN:
http://www.shiftn.de/
This program automatically detects shapes and lines which are supposed to be straight and or horizontal or vertical and adjusts the image. Very impressive and free.

Ludwig
Posts: 7
Joined: 30.04.2007 02:27

Unread postby Ludwig » 03.05.2007 06:11

Lutz,

thank you for the links.

Does PTLens really work as a plug-in of Helicon Filter? I thought the Plug-in is for Photoshop only. If it worked with HeliconFilter, it would really be fantastic. If not, PTLens is pretty useless, since it can only be used for JPEGs.

Your feedback would be highly appreciated

Ludwig

lutz
Posts: 155
Joined: 14.04.2006 02:51

Unread postby lutz » 03.05.2007 20:55

Hi Ludwig,

perhaps you can try it yourself. Most photoshop plugins do work with within Helicon Filter. However, I am not sure if HF will report the EXIF data to the plugin (this is something which seems to be often not implemented). If not we could put it onto our wish-list ?

Ludwig
Posts: 7
Joined: 30.04.2007 02:27

Unread postby Ludwig » 03.05.2007 22:09

Hi Lutz,

I have installed the PTLens Plugin. The good news is, that the installation itself worked well - no problem.

However, you are right, the EXIF data is not handed over to the pug-in. Instead, one needs to enter camera type, lens type and focal length manually (which is not really practicable). Furthermore, the correction seems to be applied to the RAW data, which means, that this data is actually changed. I am not 100% sure yet, but that is my impression. If that was true, I would not use the plug-in. My hope was that HeliconFilter would just use the paramaters from PTLens in its distortion correction.

Nice try ...

Regards

Ludwig

lutz
Posts: 155
Joined: 14.04.2006 02:51

EXIF reporting?

Unread postby lutz » 08.05.2007 20:22

Dan,

would there be any chance that Helicon Filter could, in future, report EXIF data to plugins to enable the use of PTLens for example?

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Dan Kozub
Posts: 1157
Joined: 24.03.2004 18:14

Unread postby Dan Kozub » 16.05.2007 12:55

There is alway a chance :)

Adobe SDK is badly documented so many things should are difficult to understand. I will check again if we can fix this.

Ludwig
Posts: 7
Joined: 30.04.2007 02:27

Unread postby Ludwig » 04.09.2007 14:08

Dan,

any news on this topic? I realize, that this might not be easy to implement. However, I am sure it would be worthwhile.

Regards

Ludwig

BillZM
Posts: 17
Joined: 16.07.2006 01:38

Unread postby BillZM » 23.09.2007 16:53

Here's what the PTLens site says about the plug-in:
"The plug-in version works with Photoshop version 6 and above, all versions of Photoshop Elements, and the German FixFoto. Although PTLens is compatible with Photoshop 5, Paint Shop Pro, and Irfanview camera make, model, lens, and focal length must be manually specified as these applications do not supply EXIF information to plug-ins."

And then there are 3rd party applications which simply use the PTLens database:
"In addition to PTLens, the following applications can access the PTLens database: BreezeBrowser Pro (PC), Radcor (PC), and LensFix (Mac). Download the latest database and consult with your vendor for installation instructions." I wonder what arrangements these software developers have made with PTLens? I believe users still need to buy the PTLens license ($15) for updates.

John Lai
Posts: 56
Joined: 09.12.2006 22:45

Unread postby John Lai » 09.10.2007 21:09

BillZM wrote:I believe users still need to buy the PTLens license ($15) for updates.


No, it is a lifetime free upgrade. You only pay once for PTLens.
I just upgraded for free.

John

John Lai
Posts: 56
Joined: 09.12.2006 22:45

Unread postby John Lai » 24.11.2007 06:07

Dan Kozub wrote:There is alway a chance :)

Adobe SDK is badly documented so many things should are difficult to understand. I will check again if we can fix this.


And what is your finding?

John

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Dan Kozub
Posts: 1157
Joined: 24.03.2004 18:14

Unread postby Dan Kozub » 29.11.2007 18:50

Sorry, no progress so far


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