Return-Path: Received: from gateway08.websitewelcome.com ([69.56.176.29] verified) by media-motion.tv (CommuniGate Pro SMTP 4.2.10) with ESMTP id 4760663 for AE-List@media-motion.tv; Fri, 29 Jun 2012 18:22:52 +0200 Received: by gateway08.websitewelcome.com (Postfix, from userid 5007) id 16208A2B7EA95; Fri, 29 Jun 2012 11:26:04 -0500 (CDT) Received: from alpina.websitewelcome.com (alpina.websitewelcome.com [74.54.176.2]) by gateway08.websitewelcome.com (Postfix) with ESMTP id 0B740A2B7EA75 for ; Fri, 29 Jun 2012 11:26:04 -0500 (CDT) Received: from [199.21.106.94] (port=54749 helo=[192.168.0.5]) by alpina.websitewelcome.com with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.77) (envelope-from ) id 1Ske1D-0004bo-Pn for AE-List@media-motion.tv; Fri, 29 Jun 2012 11:26:03 -0500 From: Chris Meyer Mime-Version: 1.0 (Apple Message framework v1278) Content-Type: multipart/alternative; boundary="Apple-Mail=_D50BBB24-1C94-4F39-B208-56D7853764C3" Subject: Re: [AE] Lens Distortion Date: Fri, 29 Jun 2012 10:26:02 -0600 In-Reply-To: To: "After Effects Mail List" References: Message-Id: X-Mailer: Apple Mail (2.1278) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - alpina.websitewelcome.com X-AntiAbuse: Original Domain - media-motion.tv X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - crishdesign.com X-BWhitelist: no X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: ([192.168.0.5]) [199.21.106.94]:54749 X-Source-Auth: chris@crishdesign.com X-Email-Count: 5 X-Source-Cap: Y3Jpc2h3ZWI7Y3Jpc2h3ZWI7YWxwaW5hLndlYnNpdGV3ZWxjb21lLmNvbQ== --Apple-Mail=_D50BBB24-1C94-4F39-B208-56D7853764C3 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=iso-8859-1 I think this points to the importance of DPs documenting shots with lens = and sensor, so we can recreate the FOV to remove lens distortion using = Optics Compensation or other effects. Even better would be this ending = up in the metadata, and plug-ins being able to access it = directly/automagically.=20 (Point of frustration: When I take stills with my 5D, the lens = information appears in Bridge; when I shoot video with the same camera, = I am hard pressed to find the same information in either Bridge or AE.) In the meantime, The Foundry's ability to reverse engineer the lens = distortion is one of its advantages over AE's new Camera Tracker. - Chris On Jun 29, 2012, at 10:02 AM, Darby Edelen wrote: > Distort > Optics Compensation is intended for removing and = reintroducing distortion. It's fairly straightforward and requires you = to adjust the properties manually as it does no analysis of the footage. = This is usually easiest to do on footage that should have strong = vertical or horizontal lines in it. You can put a layer with the grid = effect above your footage to guide the process. >=20 > Once you have the properties all set for your undistortion, you'll = need another copy of the effect applied after compositing (on an = adjustment layer, or up a comp level) with the "Reverse Lens Distortion" = checkbox enabled in order to redistort the footage. >=20 > Other than that I know that The Foundry's CameraTracker has some lens = distortion features that will analyze a sequence and generate data on = distortion that can be used to undistort/redistort. There's at least = one free tutorial on using that feature: >=20 > http://www.thefoundry.co.uk/products/cameratracker/training/#class8 >=20 > -D >=20 > On Fri, Jun 29, 2012 at 8:46 AM, Byron Nash = wrote: > Apparently no one using AE removes lens distortion. ;-) >=20 > On Thu, Jun 21, 2012 at 9:07 AM, Ross Shain = wrote: > Hi folks, > I am curious to hear from any experienced AE artists who deal with = lens distortion issues... >=20 > Specifically, if you are using 3rd party applications to = undistort/distort or manual techniques with AE. If anyone would like to = share their workflow or shortcomings, I am quite interested to hear from = you.=20 >=20 > Feel free to email me direct or post if this is a valuable thread to = comment on.=20 > Thanks, > Ross >=20 > --=20 > Ross Shain > Chief Marketing Officer > Imagineer Systems - developers of mocha planar tracking and visual = effects tools. > www.imagineersystems.com=20 >=20 >=20 >=20 >=20 --Apple-Mail=_D50BBB24-1C94-4F39-B208-56D7853764C3 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=iso-8859-1 I = think this points to the importance of DPs documenting shots with lens = and sensor, so we can recreate the FOV to remove lens distortion using = Optics Compensation or other effects. Even better would be this ending = up in the metadata, and plug-ins being able to access it = directly/automagically. 

(Point of frustration: = When I take stills with my 5D, the lens information appears in Bridge; = when I shoot video with the same camera, I am hard pressed to find the = same information in either Bridge or AE.)

In the = meantime, The Foundry's ability to reverse engineer the lens distortion = is one of its advantages over AE's new Camera = Tracker.

 - = Chris


On Jun 29, 2012, at 10:02 = AM, Darby Edelen wrote:

Distort = > Optics Compensation is intended for removing and reintroducing = distortion.  It's fairly straightforward and requires you to adjust = the properties manually as it does no analysis of the footage.  = This is usually easiest to do on footage that should have strong=20 vertical or horizontal lines in it.  You can put a layer with the = grid=20 effect above your footage to guide the process.

Once you have the = properties all set for your undistortion, you'll need another copy of = the effect applied after compositing (on an adjustment layer, or up a = comp level) with the "Reverse Lens Distortion" checkbox enabled in order = to redistort the footage.

Other than that I know that The Foundry's CameraTracker has some = lens distortion features that will analyze a sequence and generate data = on distortion that can be used to undistort/redistort.  There's at = least one free tutorial on using that feature:

http://www.thefoundry.co.uk/products/cameratracker/training/#class8=

-D

On Fri, Jun 29, 2012 at = 8:46 AM, Byron Nash <byronnash@gmail.com> wrote:
Apparently no one = using AE removes lens distortion. ;-)

On= Thu, Jun 21, 2012 at 9:07 AM, Ross Shain <rosss@imagineersystems.com> wrote:
Hi folks,
I am = curious to hear from any experienced AE artists who deal with lens = distortion issues...

Specifically, if you are using 3rd party = applications to undistort/distort or manual techniques with AE. If = anyone would like to share their workflow or shortcomings, I am quite = interested to hear from you.

Feel free to email me direct or post if this is a valuable thread to = comment on.
Thanks,
Ross

--
Ross Shain
Chief Marketing Officer
Imagineer Systems - developers of mocha planar tracking and = visual effects tools.
www.imagineersystems.com





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