Archive for January, 2009

I have continued to work with the Motion Capture Data from Sunday and have come across a significant improvement to the thumb. The wrist still pops but the thumb pops very few times.

I’m currently looking into getting a trial of the PeelSolver Plug-in for Maya. PeelSolver allows the user to by-pass motion builder and attach the data to a skeleton right in Maya. The issues I am having in MotionBuilder are with attaching the fingers to the actor. I’m hoping that this plug-in would allow the data to be better read by the final skeleton.

Today’s capture session went well. Being at the computer was much easier than directing someone at the computer and being in the suit. I was able to get several decent captures and I have been working with them since we finished up earlier today.

John helping out

The past two days I have been working first on the Fur Elise capture and then on one of the Mary Had A Little Lamb captures.  The more and more I worked on the Fur Elise capture the more I noticed issues besides the jittery leg.  After working in MotionBuilder with the FCurve editor on Wednesday I realized the hands weren’t level.   For some reason when I applied the motion to the Mia character (whose skeleton I use on my Maya models) the hands became uneven.  This problem is not fixable because keying the hand defeats the entire purpose of the glove exercise and it would be near impossible to key the subtle hand movements of a real human.  Therefor I decided that I would go ahead and simplify the process and get a one hand capture working before I go back to the two hands.

At this point I started working on a Little Lamb capture.  At least 20 or 30 times I reworked the location of the markers on the actor and debated on different sizings of the actor.  I have two examples below of the type of issues I’m running into.  This weekend I will continue to work with the Little Lamb capture.

Also I spoke to Dave Kaul about moving the cameras and he told me I need to speak with Anthony at the cage about that.   If I cannot get the Little Lamb capture working, I will be pursuing the movement of the cameras but will also go ahead and recapture without moving them on Sunday.  I have a friend that can play a basic song on the piano and he will be getting in the suit so that I can ensure a clean capture and hopefully a quicker cleanup than my past captures.

I also spoke with my modeler and he will be modeling the skeleton and painting its weights in the next week. After that he will be painting the weights on my alien character. The piano will be played by the skeleton until the alien is finished and working properly.

After a long weekend of trying to get my piano captures to work, I finally decided to work on a different capture I had done for fun.  I decided to do this capture so that I could see if I could even get a sucessful five finger capture seeing as the piano captures aren’t going well.  I had made a cone man character for my Motion Capture Technology class during Spring of 2008 and I applied to him a five finger capture of me miming.

I’m starting to come to the conclusion that SCAD’s studio is just not set up well enough for such a central thing as a piano performance.

I spoke to a modeler, Kyle Blair, who is going to be modeling a mime for me and also a “Mickey” type skeleton to use for other captures.  I will continue to see if the piano data will work but am thinking that at this point I’m better off getting multiple five finger captures so that I have more for my demo reel than one piano playing performance that took two quarters to do.

Mickey Skeleton

Tonight I captured again.  I had some more animated performances and re-positioned myself so that the left calf was visible in most of the captures.  Unfortunately there was still some glitching.  I also just catpured some other actions while wearing the 5 fingered gloves, potentially to use when this project is completed.  I am working with some of the data for class tomorrow morning and will continue to work with it for class 5.  Hopefully for that class I will have some sucessful results.

The capture session on Thursday went well.  Though Vicon is having some issues with crashing, we pulled through and I have several “successful” captures.

T-Pose

Playing

After going through the post processing steps everything appeared to be working well - that is up until MotionBuilder.  It appears that either the skeletal rig I built in Vicon is not proportionate or that I’m so out of proportion myself that I’m having issues lining everything up.  The fingers are schrunching as you can see in the following screenshot.  For Wendesday I hope to troubleshoot and get the problem resolved.

Hand Crunching in MotionBuilder

Playing

I have some progress on the five finger skeleton I’m building in ViconiQ. The skeleton is a modification of the three fingered skeleton. Vicon’s modeling aspect is not particularly user friendly so this took some time. It appears I’ll have to start with the three finger now on the right side as well. I have found no way to mirror it.

Left Side Complete, 5 Finger Skeleton

Left Side Has 5 Fingers

Bones & Markers

Markers

I’ve been keeping a list of motion capture studios in the United States. Here’s the list so far.

ImageMovers - http://imagemoversdigital.com/ - San Rafael, CA
RedEye Studios - http://www.redeye-studio.com/ - Hoffman Estates, IL
Lamb - http://www.lamb.com/ - Minneapolis, MN
House of Moves - http://www.moves.com/ - Los Angeles, CA
Motion Analysis - http://www.motionanalysis.com/ - Santa Rosa, CA
ElektraShock - http://elektrashock.com/ - Venice, CA
Spiritwalk Visioneering Inc - Austin, TX
LocoMotion Studios - Wimberley, TX
Avatar Motion Capture Studios - http://avatarmocap.com/ - New Orleans, LA
Kinetic Impulse - http://www.kinetic-impulse.com/ - ?
Auvis Studios - http://www.auvisstudios.com/ - ?
Alcazar Entertainment - http://www.alcazar-entertainment.com/ - Los Angeles, CA & San Francisco, CA
Critical Moves - http://www.criticalmovesusa.com/ - Detroit, MI
Concept Labs Inc. - http://www.conceptlabsinc.com/ - Jamaica Estates, NY
Cinemanix - http://www.cinemanix.com/ - Presto, PA
CaptiveMotion - http://www.captivemotion.com/ - Tempe, AZ
Black Point Studios - http://www.blackpointstudios.com/ - San Francisco, CA
Elemental Motion - http://www.elementalmotion.com/ - owner now works at game company
Radioactive Labs - http://www.radioactivelabs.com/ - Austin, TX
MODS - http://www.themods.tv/ - Burbank, CA
Motion Analysis Studios - http://www.mastudios.com/ - Hollywood, CA
Meta Motion - http://www.metamotion.com/ - San Francisco, CA
Trilogy Studios - http://www.trilogystudios.com/ - Sherman Oaks, CA

Studio II began yesterday with professor Joe Pasquale. Today I’m working in the studio finding a ’sweet spot’ for the hand motion capture animation. In other words I need to find a spot in which all the markers on my hands can be seen by the cameras with minimal flickering.

To test for an ideal spot I first held out my hands and walked around the boundary box slowly to see which area could see all my fingers as I moved. Then I made a second round where I wiggled my fingers like I was playing a piano.

Hands

Gloves

It appears that the best corner is by cameras #4 and #5. At this corner I’m getting readings from cameras 3, 4, 5, 6, 7, 8, 10, 11 and 12. That’s 9/12 cameras.

Spot by #4 and #5

The second potential spot is directly between cameras #2 and #3. At this location there are actually 11/12 cameras seeing parts of my hands but the number of cams that can see the entire hand is lower. The cameras that can see the hands straight on are critical.

Spot by #2 and #3

A third spot would be directly in front of camera #8. At this spot there are 9/12 cameras that can see my hands.

Spot by #8

I have a capture session scheduled for Thursday at 5pm. I will try all three spots at this time. I also will be playing Fur Elise and Mary Had a Little Lamb for test songs and potentially to replace the song Mad World that I had originally planned to use. I also have a DVX100 camera checked out for this session so that if the capture is successful then I will be able to do a breakdown.

As a secondary idea for when this project is finished, I would like to try more full body captures including the three finger gloves. I’ve contacted an animation major I know to try to get in contact with others that would be interested in sharing their modeled biped characters for me to add motion capture to. If I did this then they would be able to showcase their model while I can have a previously modeled character to animate.

Mocap Studio

Mocap Studio