Motion Tracking and superimposing a logo on an animated character

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Motion Tracking And Superimposing A Logo On An Animated Character

Motion Tracking and superimposing a logo on an animated character

Created by Christophe
9 Months Ago
July 12, 2018 @ 6:06 pm

Hello again,

This is my second question and one I have been trying to ask for a long time on the YouTube channel.

Please have a look at this brilliant Videohive project: https://videohive.net/item/hero-animation-toolkit/20005694

It's not new and for a couple of years now, I have been asking the author periodically if it was possible to customise the project so that the logo on the chest of the superhero can be changed. So far, the author has said no. I feel that's something that really limits the use of the project. If you look at the video demo, you will notice that the character has a yellow and black circle in the middle of the chest. That cannot be replaced or customised. For example, if I wanted to replace this yellow and black circle with a superman logo, I can't.

So I had a look at motion tracking, and although I cannot do it yet, I am pretty sure it is not difficult to track the yellow and black circle and put something (a logo) on top. But what completely throws me, is how that superimposed logo on top should react to 3D perspective. Imagine that the yellow and black circle is motion tracked and a new logo superimposed: when the character is turning around, the logo should also turn and eventually disappear is the chest come out of view. And I don't know how to do that.

When I asked this question on your YouTube channel, I asked whether you already had a tutorial that would cover this issue. I had not found one, but if there is, please just point me in the direction of the relevant video.

All my thanks

Cricri

9 Months Ago
July 12, 2018 @ 15:28 am

Hi @Christophe,

Looking at what you'd get with those project files I have to say upfront that it would not be an easy task to insert a new logo into the 3D rendered clips. It's not impossible, but difficult.

You cannot use basic motion tracking as you, correctly, pointed out that it wouldn't account for the perspective shift in the logo. You have 2 options that I can see:

1) Use a planar tracker such as Mocha to track the 3D movement of the plane of the logo on his chest and then replace that. You will have to manually adjust/fix/mask any elements that come in front of the logo (fully or partially). I have a tutorial for Mocha right here:

I have a few other Mocha tutorials as well if you search my channel for 'Mocha'.

Limitation would be that full 360 rotations are almost impossible to do and you would have to track them in sections.

2) Fully 3D track the character. This seems kind of silly since it comes from an already created and animated 3D character. Essentially you'd have to 'object' track the character. That means tracking his movement and re-constructing the character in 3D yourself. Then you can create new overlay textures and render them on top. A difficult process that might require specialised software (not really possible in After Effects or Premiere) and likely someone skilled spending a fair amount of time in a 3D program.

That is really the only 2 options that I can see - depending on how 'realistic' you want the logo swap to look and how much time you are willing to spend on it.

Hope that helps giving you at least an idea of how you might be able to get there. Quite frankly, if it's that important I'd almost ask the author if you can pay him $100 to render you out a custom set if you give him a new logo to insert - that might be the easier , cheaper and quicker route

Christophe
9 Months Ago
July 13, 2018 @ 12:31 pm

OK, thanks a lot for your detailed answer. As far as I remember, he doesn't do custom renders but I'll try again.

In the meantime, I still need to understand how much can be done in Mocha, so thanks a lot for the link to the tutorial/

Kind regards

Christophe

9 Months Ago
July 13, 2018 @ 3:42 pm

No worries @Christophe!

Good luck and let me know if you get stuck! Hopefully the tutorial can get you a little bit of the way there already

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Motion Tracking And Superimposing A Logo On An Animated Character

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