To create mask is simple, but I can’t figure out how to track replacement mask (that will retouch the holder of silver ball). Camera moves in all directions, so I can’t figure out how to specify a source for retouch.
I can imagine how to retouch it if camera moves only in one direction, but in footage I’m planning for that project, camera moves in all directions.
(Now it seems to me, it would be a bit easier to use diagonal holder (like from center view to left corner), because camera motion is going to be forward (mostly, but not only).
Do you have any ideas or links HOW TO
For now I can’t find even right keywords for searching of some relevant links.
I have some basic knowledge about tracking, that I used for reconstruction or camera movement, but this is something I can’t catch.
Thanks for help, but as you said coat-hanger is too thin, so when I will walk, ball becomes shaking. So I can find a bit thinner profile, but it doesn’t solve the issue.
Your link to tutorial shows removing only small tracking point (like dots) by still image, that is (in my case) worse than I ussually use - offseted movie. If you had a time to see my movie example you could see that camera is walking and rotating.
From rotation I can see parts of the screen that can be use for restortion of image, but when camera is moving forward, there is almost zero pixels I can use
Maybe if someone knows how proffesionals do this job. It’s quite a long time that I saw this BMW movie series, one with Madonna
After 4:30 you can see a few shots where camera was connected to the car and the holder removed in postproduction.
Making of
(its more about driving, but you can see the camera on the car)
Each of those shots lasts for about a second, so you’re talking about maybe 120 to 150 frames that need correcting. They probably just cloned out the support frame by frame. Have four or five guys spend a week doing nothing but cloning.
If movement is lateral across the frame then you clone from the preceeding frames but if you move forward in z axis you have obscured content that you want to clone. To capture the missing elements you must have another off axis camera to clone from. Or shoot stills to track in but they wont have motion blur.
Sounds like better use two cameras, one for reflection behinde shoulder and one in front for shooting a scene.
In thgis case I don’t have to retouch holder, and reflection will be without a camera man in reflection
You might try a bracket like this…
If the camera is directly above the bracket it should appear as just a thin line. It should be plenty strong enough to prevent up/down bouncing. If your sphere is hollow, I doubt it would have enough mass to cause side-to-side flexing of the bracket during turns.
Yeah, I got the same idea tonight cut a shape from thin metal sheet. I was thinking about 45°angle because I expect mostly forward movement. So, have ability to remove these thin lines (few pixels offset could be OK). I used two of them, it can be thinner than paper sheet and this construction improves also stability.
@Steve S: Hmmm, on other hand, vertical bracket does shorter edge on screen (than diagonal) and its easier for eye to ignore vertical artefact in image than diagonal one …
Anyway thanks for sharing.
I felt into problems, just because I was sure it cant be problem to remove anything from footage
Edit: I totaly forget that critical part, that I’m need to get almost invisible from camera view is only a few centimeters (like 8cm).
OK, I will check what material can fit for this porpoise. Something like a cutter knife or razor blade
cut a shape from thin metal sheet. I was thinking about 45°angle because I expect mostly forward movement. So, have ability to remove these thin lines (few pixels offset could be OK). I used two of them, it can be thinner than paper sheet and this construction improves also stability.
