Skip to main content

Markers

Playing with markers today yielded some interesting results ~ I'm using a rather brute force approach in opencv by using InRangeS against an HSV image, and have pulled the ranges via an app to obtain a sample of representative pixels. Quick and dirty, but I'm encouraged by the results. False positives are high and its not robust in terms of working across lighting conditions but in-part the problem is the choice of material for the markers (electrical masking tape) which suggests :

CVFB-R5: Markers must be composed of a material which is minimally reflective.

I need to define "minimally" with more precision obviously but I think the above would improve the detection in varied lighting conditions and possibly reduce false positives if I resample. And yes, I know this should have been obvious but I have to harken back to my comments about a lack of design rationale...

I'd be reasonable confident that with a few improvements that this would roughly match the functionality of the SixthSense system so anything over and above this is an improvement.

Next steps are to look at cvblob and then move onto Neural Networks

Some notes : Popović wang ~ http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.163.3388&rep=rep1&type=pdf ~ MIT data glove.

kakuman A survey of skin-color modeling and detection methods

Comments

Post a Comment

Popular posts from this blog

I know I should move on and start a new blog but I'm keeping this my temporary home. New project, massive overkill in website creation. I've a simple project to put up a four page website which was already somewhat over specified in being hosted on AWS and S3. This isn't quite ridiculous enough though so I am using puppet to manage an EC2 instance (it will eventually need some server side work) and making it available in multiple regions. That would almost have been enough but I'm currently working on being able to provision an instance either in AWS or Rackspace because...well...Amazon might totally go down one day! Yes, its over-the-top but I needed something simple to help me climb up the devops and cloud learning curve. So off the bat - puppet installation. I've an older 10.04 Ubuntu virtual server which has been somewhat under-taxed so I've set that up as a puppet master. First lesson - always use the latest version from a tarball unless you have kept t
Post a Comment
Read more

Prototype Hardware Rig

Its late here so I'm a brief post. As I've said, hardware wise there are a lot of options as to where to place the various components for a WGI and a few studies out there have looked at the various components in some depth (TODO refs). However an obvious constraint for this project is available resources (hardware, time, money etc) and when it comes to the act of physically assembling thing, and doing so quickly, for my first build it is almost a matter of just making the best out of things. Hence I present the rigging for O6Sense FG v0.01 which has been inspired by observing the trend towards the wearing of large closed-cup headphones and the opportunities this opens in having a "socially acceptable" wearable prototype. What is it? Its a pair of cheap headphones with the cups cut off and 2 Rode pop-shield mounts fitted into the rear wire loops. I cant help but feel some providence at work here since not only is the rear arm a snug fit the screw holes are the ex
Post a Comment
Read more