I’m not going to go through the obvious steps in buying a motion capture system like analyze your requirements, your budget, your application, and your space. All of that is easy. What’s not so easy is separating the good motion capture systems from the bad. While it can be a matter of opinion what is good and what is bad, there are some aspects of motion capture you should think about before committing to a motion capture system.
Beware of the claim “No Clean Up Required"
A claim I have often seen is “No clean up required." There is no dispute that Vicon, and to a lesser extent Motion Analysis, are the premiere motion capture systems. These are high end, high-priced motion capture systems that, in the right hands, can provide incredible motion capture. Even the data from these systems needs clean up. When a company makes this claim for a system that is less than $100,000, they either have no sense of what “good" data looks like or are trying to fool customers who do not know much about motion capture. Either way, I would not buy a system from them. I see this claim and I wonder what else they are lying about. Beware of the claim “No clean up required"
Beware of the Video
In marketing it is called “bait and switch". The video shown on the home page shows great motion capture data. Is it from the system you are about to buy? How much time did it take to get the raw data cleaned up for this video? Are you buying an 8 camera system based on data you’ve seen from a 24 camera system? Beware of the video.
Have you seen it working?
There are some motion capture companies that show up every year at trade shows like Siggraph and GDC but never get their system running. If they are running then they may be on an inaccessible stage. Are they moving in slow motion? Are they doing a predefined set of moves? Can you interact with the motion capture artist? If you cannot ask the artist to do some motions you pick then no, you have not seen the system working.
Does the character walk across the floor?
A normal walk is one of the hardest motions to capture because everyone has a sense of what it should look like. There is no valid reason for having a character pinned to the wall. If a company tries to explain why, walk away, they are hiding something. Before I buy a system I want to see the character, as raw data, walking across the floor.
How much space do I need and what is the size of the motion capture area?
Vicon is the leader in motion capture but the system needs a large, stable area. There are some systems that claim they need no markers, just video cameras. Ask how much space is required for how much capture area. It probably needs a large space for a small capture area. Ask about the footprint of the capture area. This is the area on the floor the artist is able to move about in. Also ask about the vertical capture area. Can you capture below the knees, can you jump? Some systems have small footprints and small vertical areas making them virtually unusable. Space required and capture area are two important aspects of a motion capture system.
What can I do with the data?
You are a customer new to motion capture. You’ve found the perfect motion capture system for your application. Where do you go for support if you have questions about using the data? Can you call the hardware company and ask them how to get the data from the viewer software, to an animation program, and then into a game engine? If the company does not know how to use the data or does not know how to clean up the data, walk away. I would want to buy from a company that knows what you can do with the data.
Motion capture can be fun and productive, or not. Ask these important questions before you buy a system. It will make a huge difference to your motion capture experience.
Happy Motion Capturing!
Free Motion Capture Software
One of the basic reasons why animation companies baulk at motion capture is because of misconceptions rather than face when the reality is that motion capture can actually make things cheaper and easier for animation companies.
Based on Nickelodeon's model, a half-hour motion capture animation program could cost as little as $200,000 versus a minimum of $400,000 per episode for a traditional cell animated half-hour program.
A 1997 Los Angeles Times article, Marla Matzer provides another perspective on costs: "Medialab... estimates that a 'full body' character can be animated for as little as $1,000 per minute; over a series of shows, the price can go even lower. Cell animation, by contrast, can cost as much as $5,000 a minute." these prices don't include other production elements, such as backgrounds
The costing goes up because in traditional animation the number of personnel involved is much higher than compared to motion capture or mocap for short.
Mocap is fast becoming the mainstay in many animated movies and non animation movies cause the usage of mocap can make characters like for example Davy Jones and his crew in the movie pirates of the Caribbean, and so on. And the best part was that when they came to the part where Davy Jones was to b shown as the real person Bill Nighy was used both in cgi and normal person to potraray Davy Jones.
Motion capture is reffered to as 3D rotoscoping. But the problem was that the stigma that was associates with rotoscope seems to have come into motioncapture. For example in movies where one character is completely different from the others, lets say for example in terms of physical appearience. As long as the picture is running correctly and the desired results are available there is no need for people to know that the given movie is made using rotoscope. But for most people the usage of rotoscope was making them feel that it was innadiquate or just not natural.
In motion capture the actor and the action is saved frame by frame and fed to the character to be animated. Thus in mocap it can be said that in all since the animation used is natural and the real animation. Dancers stroke a metaphorical canvas, sketching ephemeral lines that are lost in the moment of creation. The invention of film and video immortalized some of these centuryY5 greatest dancers, preserving their movement for the next generation. But the quality of such recordings betrays the vitality of the dancer, often leaving the viewer with snatches of their genius seen through a murky lens. Motion capturing, the product of body sensors that create a constellation-like skeleton reassembled with computer brushes and palettes, may change the dancers predicament de rigueur by invigorating a self they didn’t know they had. Paul Kaiser and Shelley Eshkar of Riverbed have motion captured the legendary dancer Bill T. Jones for their exhibit at Cooper Union. The artists call it "Ghost catching," the term Native Americans gave to photography which some believed stole their souls.
The feature-length Sinbad: Beyond the Veil of Mists, produced by Pentafour in 1999, employed one performer for the body of each character and another for its facial data. Body performers were chosen because they matched the height and body shape of the characters in the film. Voice performers for the film are recognizable stars (including Brendan Fraser, Leonard Nimoy, Mark Hamill, Jennifer Hale, and John Rhys Davies), a common marketing decision for feature films. Incidentally, shooting of the film's studio material lasted eight weeks and the films' cost is estimated to be under US$20 million, about one-fifth that of a Disney animated feature.
A 1996 Wired article by Evantheia Schibsted suggests that motion capture taps into intangible elements of experience. In the article, the author refers to Merce Cunningham's opinion of a specific type of software called Lifeforms, which "is not revolutionizing dance but expanding it, because you see movement in a way that was always there-but wasn't visible to the naked eye." Dancer and software designer Theela Shiphorst extends this idea, adding that "the nonlinguistic knowledge inherent in physical training is a richly technical world that can inform technological development."
Both Scott Thomson Thomson & Yh Lee are contributors for EditorialToday. The above articles have been edited for relevancy and timeliness. All write-ups, reviews, tips and guides published by EditorialToday.com and its partners or affiliates are for informational purposes only. They should not be used for any legal or any other type of advice. We do not endorse any author, contributor, writer or article posted by our team.
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