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kavinb70147053
Participant
October 20, 2017
Answered

3D camera track issue

  • October 20, 2017
  • 2 replies
  • 569 views

I just tracked some footage but I see very few track points, when I view the 2d source points it looks perfectly normal, iv never had this kind of issue before.... is there a way to create a camera +null using the 2d source points or fix the issue with the 3d solve??

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Correct answer Roei Tzoref

guess Ae can't make the 3d coordinates because not enough camera perspective information. if there isn't enough your solve won't work. can we see the shot? unfortunately you can't manually create 3d points from 2d points - this happens automatically. if you need more control, you can use Syntheyes that does this. you can also add 2d track points to get a better solve. but even with syntheyes, if there isn't enough perspective information, you won't get a camera solve.

2 replies

Mylenium
Legend
October 21, 2017

What the man said. Judging from the screenshot, there doesn't seem to be enough parallax or else the markers wouldn't cluster up so much only in a few places.

Mylenium

Roei Tzoref
Roei TzorefCorrect answer
Legend
October 21, 2017

guess Ae can't make the 3d coordinates because not enough camera perspective information. if there isn't enough your solve won't work. can we see the shot? unfortunately you can't manually create 3d points from 2d points - this happens automatically. if you need more control, you can use Syntheyes that does this. you can also add 2d track points to get a better solve. but even with syntheyes, if there isn't enough perspective information, you won't get a camera solve.

kavinb70147053
Participant
October 21, 2017

Roei Tzoref
Legend
October 21, 2017

games are hardly a decent candidate for tracking. the perspective you see is usually distorted (the geometry is synthesized and not real), in addition in your case you got foreground overlays on your footage that will mislead the tracking. and it's very dark and fast. if you had a decent camera move with no overlays and good exposure you might be able to pull through but too many things here that's throwing off the track.