Return-Path: Received: from eatspam.slcc.edu ([144.35.15.69] verified) by media-motion.tv (CommuniGate Pro SMTP 4.2.10) with ESMTP id 4635490 for AE-List@media-motion.tv; Thu, 23 Feb 2012 16:53:52 +0100 X-ASG-Debug-ID: 1330012822-0437c61280a70430001-edO5QZ Received: from vCAS1.slcc.int (vcas1.slcc.int [10.1.11.52]) by eatspam.slcc.edu with ESMTP id veAowJslyfMBZizh for ; Thu, 23 Feb 2012 09:00:22 -0700 (MST) X-Barracuda-Envelope-From: John.Morgan@slcc.edu Received: from EXCH.slcc.int ([127.0.0.1]) by vCAS1.slcc.int ([fe80::5023:faf7:26da:d5bf%11]) with mapi; Thu, 23 Feb 2012 09:00:22 -0700 From: John Morgan To: "AE-List@media-motion.tv" Date: Thu, 23 Feb 2012 09:00:20 -0700 Subject: Motion tracking woes Thread-Topic: Motion tracking woes X-ASG-Orig-Subj: Motion tracking woes Thread-Index: AczyQUMP0e5IyVXFSGuXmK05cQszGw== Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_EAE675A223415848A14AA69EBCDE9D0A591390832AEXCHslccint_" MIME-Version: 1.0 X-Barracuda-Connect: vcas1.slcc.int[10.1.11.52] X-Barracuda-Start-Time: 1330012822 X-Barracuda-URL: http://eatspam.slcc.edu:8000/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at slcc.edu X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=6.0 tests=HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.89305 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 HTML_MESSAGE BODY: HTML included in message --_000_EAE675A223415848A14AA69EBCDE9D0A591390832AEXCHslccint_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Admittedly I've not done a lot of motion tracking. I've got a shot-head and shoulders interview on green screen (720p 23.98)-w= here I failed to notice the little white speck at the edge of a nostril. Steps done so far: 1- Exported the first frame of this clip to Photoshop>rubber-stamped/f= ixed the white speck area, then made a small selection of the immediate are= a (with 2 pixel blur)>created and saved to new layer>deleted background lay= er and saved as .PNG file. So my "repair" area is a small patch, also 1280= x720, surrounded by lots of transparent area. 2- Imported the bad clip.mxf (P2 video file) and the patch.png file to= Ae. Turned on tracking so I'm tracking Position and Rotation. Set the two = tracking points to 1) exactly on the white spec and 2) a point on an ear> d= efined the target to be the patch.png file and ran the Analyze function to = set the related keyframes. During his interview, as you might assume, there's quite of bit of head sha= king. The nose goes all over the place. There's motion blurring that occurs= on the clip because of the motion, and that seems to shake the white spec = tracker loose. It drifts around slightly. But here's the deal. After applying all the motion and rotation keys to the= patch.png file, the patch locates itself (according to the keyframes) seve= ral inches away on his cheek. My nostril repair patch now appears to be a m= ole that pretty closely tracks to his cheek rather than tracking to the nos= tril area where it was located at frame 1 when the tracking began. My question is: what is the trick to take a set of motion/rotation keys at= tached to the patch.png file, and slide... ...uhhh...I got it! Change the Anchor Point! Doh! OK. So now that's solved, have I hit Ae's wall, in that its motion tracker = is only so good in high motion areas? Any other options to pin that tracke= r down tighter? Thanks, John This message, and any attachments, is intended only for the use of the addr= essee and may contain information that is privileged and confidential or ot= herwise exempt from disclosure under applicable law. If the reader of this= e-mail is not the intended recipient, you are hereby notified that any una= uthorized use, dissemination, distribution or reproduction of this message = is prohibited. If you have received this communication in error, please no= tify the sender by return e-mail and delete this e-mail and any attachments= from your system.= --_000_EAE675A223415848A14AA69EBCDE9D0A591390832AEXCHslccint_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Admittedly IR= 17;ve not done a lot of motion tracking.

 

I’ve got a shot—head= and shoulders interview on green screen (720p 23.98)—where I failed = to notice the little white speck at the edge of a nostril.

 

Steps done so = far:

1-    &= nbsp; Exported the first frame of this clip to Phot= oshop>rubber-stamped/fixed the white speck area, then made a small selec= tion of the immediate area (with 2 pixel blur)>created and saved to new = layer>deleted background layer and saved as .PNG file.  So my ̶= 0;repair” area is a small patch, also 1280x720, surrounded by lots of= transparent area.

 

=

2-      Imported the bad clip.mxf (P2 video file) and the patch.png file= to Ae. Turned on tracking so I’m tracking Position and Rotation. Set= the two tracking points to 1) exactly on the white spec and 2) a point on = an ear> defined the target to be the patch.png file and ran the Analyze = function to set the related keyframes.

 

During his interview, as yo= u might assume, there’s quite of bit of head shaking. The nose goes a= ll over the place. There’s motion blurring that occurs on the clip be= cause of the motion, and that seems to shake the white spec tracker loose. = It drifts around slightly.

 

But here’s the deal. After applying all = the motion and rotation keys to the patch.png file, the patch locates itsel= f (according to the keyframes) several inches away on his cheek. My nostril= repair patch now appears to be a mole that pretty closely tracks to his ch= eek rather than tracking to the nostril area where it was located at frame = 1 when the tracking began.

 

My question is:  what is the trick to tak= e a set of motion/rotation keys attached to the patch.png file, and slide&#= 8230;

 

…uhhh…I got it! Change the Anchor Point! Doh!

 

OK. So = now that’s solved, have I hit Ae’s wall, in that its motion tra= cker is only so good in high motion areas?  Any other options to pin t= hat tracker down tighter?

 

Thanks,

 

John

 

 

 


This message, and any attachmen= ts, is intended only for the use of the addressee and may contain informati= on that is privileged and confidential or otherwise exempt from disclosure = under applicable law. If the reader of this e-mail is not the intended rec= ipient, you are hereby notified that any unauthorized use, dissemination, d= istribution or reproduction of this message is prohibited. If you have rec= eived this communication in error, please notify the sender by return e-mai= l and delete this e-mail and any attachments from your system.  &= shy;­  = --_000_EAE675A223415848A14AA69EBCDE9D0A591390832AEXCHslccint_--