Mocap初體驗
情人節去了在Astor Place附近的Curious Picture上Motion Capture,雖然說時機不是很討喜但是有機會玩玩mocap畢竟是很難得的體驗,一套設備可是幾百萬上下的阿~~ 時間有限簡單編輯了一下影片~ 做個紀錄
mocap@Curious Picture from Jason Magic Tseng on Vimeo.
Review: Motion Capture is the process of analyzing and recording real world movement and transferring that data onto rigged character models in 3D software. There are two stages of mocap: hardware and software
Hardware: there are several types of mocap systems. They are all either opticalor non-optical ( delineated into Active and Passive)
Optical---Active:
Positional data on each marker is independently triangulated so the computer always knows which marker corresponds with each joint. This feature makes the labeling process easier. However it also cost a lot computing power.
Can be marker or marker-less
More processing power needed during capture, especially for real time data
Example: marker-less optical system, semi-passive imperceptible marker
Does not require fixed camera positions. So sessions can be move to different locations.
Outdoor direct sunlight shooting is possible
Optical---Passive:
In most cases, positional data is taken as a whole so computer cant identify joints with corresponding markers. Therefore this system often requires more post-shooting work. However, since data is taken as a whole, less computing power is required during shooting.
Can be marker or marjer-less
Less processing power needed while shooting, more processing power needed after capture
Example: reflective marker system( like the one we play with),
usually confined to one space, need fixed camera system, therefore limited in location
ususally sensitive to external factors, like light and metal during shooting.
Software:
Raw data typically taken after shooting is cleaned and tracked. This process is also known as "dot-farming". It's a process of assigning unlabeled marjers a labe that correspond to the placement of real-world marker. Data is then transferred to a 3D package, such as Motion Builder, for further refinement of motion. This process is called "retargeting".
http://en.wikipedia.org/wiki/Motion_capture
mocap@Curious Picture from Jason Magic Tseng on Vimeo.
Review: Motion Capture is the process of analyzing and recording real world movement and transferring that data onto rigged character models in 3D software. There are two stages of mocap: hardware and software
Hardware: there are several types of mocap systems. They are all either opticalor non-optical ( delineated into Active and Passive)
Optical---Active:
Positional data on each marker is independently triangulated so the computer always knows which marker corresponds with each joint. This feature makes the labeling process easier. However it also cost a lot computing power.
Can be marker or marker-less
More processing power needed during capture, especially for real time data
Example: marker-less optical system, semi-passive imperceptible marker
Does not require fixed camera positions. So sessions can be move to different locations.
Outdoor direct sunlight shooting is possible
Optical---Passive:
In most cases, positional data is taken as a whole so computer cant identify joints with corresponding markers. Therefore this system often requires more post-shooting work. However, since data is taken as a whole, less computing power is required during shooting.
Can be marker or marjer-less
Less processing power needed while shooting, more processing power needed after capture
Example: reflective marker system( like the one we play with),
usually confined to one space, need fixed camera system, therefore limited in location
ususally sensitive to external factors, like light and metal during shooting.
Software:
Raw data typically taken after shooting is cleaned and tracked. This process is also known as "dot-farming". It's a process of assigning unlabeled marjers a labe that correspond to the placement of real-world marker. Data is then transferred to a 3D package, such as Motion Builder, for further refinement of motion. This process is called "retargeting".
http://en.wikipedia.org/wiki/Motion_capture
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