Username: Password:

Author Topic: How to remove the background of the idolm@ster videos?  (Read 1725 times)

Gordon1564

  • Greenhorn
  • *
  • Posts: 6
  • A paranoid guy :x.
    • View Profile
How to remove the background of the idolm@ster videos?
« on: December 01, 2012, 05:51:43 pm »
I just saw this video yesterday:
 http://www.youtube.com/watch?v=mgl-d-UsAD8

So I wonder how could they key out the background and add another background with some great efftects, anyone knows how to do that? I really want to make a video like that.

Accoun

  • Senior member
  • ****
  • Posts: 408
    • View Profile
Re: How to remove the background of the idolm@ster videos?
« Reply #1 on: December 01, 2012, 06:12:03 pm »
I assume it's done by hand, using masks in f.ex. After Effects or Photoshop...

Cael K.

  • Producer
  • *****
  • Posts: 1609
  • Dark Slayer Style!
    • View Profile
    • Memories of Melon Pan
Re: How to remove the background of the idolm@ster videos?
« Reply #2 on: December 01, 2012, 07:35:58 pm »
We had this discussion quite a while ago, actually.

http://forum.project-imas.com/index.php/topic,1487.0.html

I don't know if anything new's popped up since then, but it should give you an idea of how it's done. In this case, I think I remember it looking like some sort of edge detection algorithm at the heart of it all.
Cael's Im@s Ranking: Azusa, Yumeko, Tomomi, Haruka

How to get stuff from Japan without causing things to explode in a shower of sparks and misery: http://forum.project-imas.com/index.php/topic,1108.0.html

Memories of Melon Pan: http://d.hatena.ne.jp/caelk/
Translations: http://www.mediafire.com/?hzc4b0jy7pwll

Currently translating (text only):
S(mile)ING! (English version, singable) - http://d.hatena.ne.jp/caelk/20140911/1410422445
Neue Green, Volume 3 - Will start sometime. ^_^;;
Rockin' Girl, Volume 1 (Chapters 1-5) - http://www.mediafire.com/?z00ffkvg5ocg11e

animagic4u

  • Producer
  • *****
  • Posts: 2810
  • #seiyuusports
    • View Profile
    • Blog
Re: How to remove the background of the idolm@ster videos?
« Reply #3 on: December 01, 2012, 07:52:29 pm »
I just saw this video yesterday:
 http://www.youtube.com/watch?v=mgl-d-UsAD8

So I wonder how could they key out the background and add another background with some great efftects, anyone knows how to do that? I really want to make a video like that.

Umm actually in some of the videos it's built into L4U or you can use a blue background in SP.
Then use a bluescreen app in the editor of your choice.
« Last Edit: December 01, 2012, 07:54:57 pm by animagic4u »

Gordon1564

  • Greenhorn
  • *
  • Posts: 6
  • A paranoid guy :x.
    • View Profile
Re: How to remove the background of the idolm@ster videos?
« Reply #4 on: December 03, 2012, 03:51:45 pm »
Uhm... After watch that video you provide me, I figure out how to do that. They use an effect called different matte, you will need 3 videos with your characters have the same costume so the only different between 3 videos is the background so the effect will remove the background and keep your idols. But it's seems difficult for me because I don't own any PS3 or Xbox360 to have enough videos and do that effect. Really hope someone wants to cooperation with me... Anyways, thanks you guys a lot.

Setsuna

  • Producer
  • *****
  • Posts: 1169
    • View Profile
Re: How to remove the background of the idolm@ster videos?
« Reply #5 on: December 03, 2012, 08:09:46 pm »
Uhm... After watch that video you provide me, I figure out how to do that. They use an effect called different matte, you will need 3 videos with your characters have the same costume so the only different between 3 videos is the background so the effect will remove the background and keep your idols. But it's seems difficult for me because I don't own any PS3 or Xbox360 to have enough videos and do that effect. Really hope someone wants to cooperation with me... Anyways, thanks you guys a lot.

That's what the request section is for (The method I used was edge difference instead, but the same principles apply) although I haven't resumed major operations yet.
Games are streamed at www.hitbox.tv/Aliciana/
No focus, any platform, suggestions welcome

Currently accepting Platinum Stars requests: http://forum.project-imas.com/index.php?topic=2575.0

http://forum.project-imas.com/index.php?topic=2415 - My technical notes on good quality recording.

animagic4u

  • Producer
  • *****
  • Posts: 2810
  • #seiyuusports
    • View Profile
    • Blog
Re: How to remove the background of the idolm@ster videos?
« Reply #6 on: December 03, 2012, 09:30:57 pm »
Uhm... After watch that video you provide me, I figure out how to do that. They use an effect called different matte, you will need 3 videos with your characters have the same costume so the only different between 3 videos is the background so the effect will remove the background and keep your idols. But it's seems difficult for me because I don't own any PS3 or Xbox360 to have enough videos and do that effect. Really hope someone wants to cooperation with me... Anyways, thanks you guys a lot.

A similar effect is used in photography for generating a fake lens blur so I can imagine this works.