www.ssontech.com

[Diegolum]

Hello Im new on SynthEyes,

I working over a large pan shot (90º aprox) in Supervised Tracker mode, the general tracking it is ok, but when a tracker go
of-screen or a new tracker go in-scren the camera do a jump.

can anyone help me on this?

sorry for the basic question.
diego

[ssontech]

Likely causes:
1. Lens distortion such that edge trackers "clash" much more than those in the middle.
2. Black boundaries around the images can defeat the auto-shutoff code.

You should be able to look at the tracker graphs and see why this is. If you see a pattern where the errors are increasing and increasing as it nears the edge, distortion is likely. If only the last 1-2 frames are bad, boundary problems are likely.

[Pretty Vacant]

If the trackers are accurate and not jumping themselves, but the solved camera is jumping on the frames when those trackers are enabled/disabled, try increasing the Transition Frames value in the solve panel.

That should weight the points' position a little less on the frames right after they're enabled and right before they're disabled, if I'm explaining that correctly.

[Diegolum]

Thank you for your reply , Russ and Pretty.

Actually there was black boundaries, i removed them but the problem still there, i also tried to increase the value of the transitions frame and the problem stays the same but slower motion.
It is strange because the tracking is perfect and the solve work is very accurate, it is just when a tracker goes of the screen or in that the camera does a small but sharp camera roll movement.
Is there any possibility to correct this matter manually in Syntheyes?
Is it possible to twick the solved camera after doing the Solve process?
Thanks a lot for your support.

Diego

[Pretty Vacant]

Make sure, if it's possible, to have other trackers near the ones that appear/disappear that are enabled overlapping the problem frames.

That's a clunky description, but for example:

You have a 40 frame sequence. TrackerX is on the right side of your image. It is enabled on frames 1 through 30 when it goes out of frame, causing a bump. Create TrackerY also on the right side of the frame, near TrackerX, that is in frame and enabled on frames 20 through 40. These are just rough numbers, but you get the idea. Try to have trackers near each other that overlap at least 3 or 4 frames - the more, the better.

While it's possible to fix it manually in SynthEyes, I wouldn't recommend it. You'd have to grab your camera in the 3D view and use the spinner to adjust the proper transformation.

For a specific bump, you can use your 3D package to edit your camera curves manually. Hopefully you don't have to get too carried away with this, as it defeats the purpose of using SynthEyes to begin with.

[ssontech]

There's nothing automagical or capricious about it, if there are jumps it is because something is telling it to, that the trajectory it generates is the best explanation for the data it has. Always better to find out why something is happening than to paper it over. If there's a little distortion that is otherwise not a concern, the suggestion to make sure there are some other nearby trackers when something goes off the edge is a good one.

[Diegolum]

Ok, that works much better! whit the nearby trackers, very nice tip, thanks!.

I work with the SynthEyes demo version(for the moment), and I can't expor the result to my EIAS 3D aplication. But I assume that the result will be the same.

I work in a music DVD with aprox 70 shot like those that I have linked below, I need to find an application to track them. Please if you have the time to have a look at those shots and tell me if it is possible to trak them whit SynthEyes. this are a complex shot because they combine the very slow speed with little tripod movement and zoom.


http://www.imago-d.com/dry/index.html
http://www.imago-d.com/laque/index.html
http://www.imago-d.com/bigpan/index.html
http://www.imago-d.com/desert/index.html

this is my two years whit-out update web page, but there some of my works.

http://www.imago-d.com

thanks for your support
diego

[Pretty Vacant]

Glad it worked for you. If you don't give SynthEyes enough information, it can't do its job - always make sure you have enough trackers to represent as much varied depth and position as you can.

The shots that you linked should be no problem for SynthEyes. Just be ready to put in some time placing trackers by hand in shots like those sand dunes. mattmerk has a nice post somewhere on the forums about getting into the "zen" of shots like that.

[Diegolum]

Hello, I tried to track the shots that I have linked before, and the only one that I can track it is the bigpan one. the 3ºone

The rest are impossible for me, I was putting a lots of tracks but Synth Eyes don't understand the 3d movement.

1ª manually I did put around 60 tracks with key frame every 12 and Key smooth 3 and finalize them.

2ª I solved them in different ways but the result is completely different than the shot.

I don't know if there are other specifics steps to track them.

Any suggestion will be welcome...

Thanks for your support

[ssontech]

Contact me directly at support and I'll tell you how to send your scene file on one or two of them and I'll see what you're doing. The basic steps are always track then solve; it's the details where people get creative.