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Grabbo

Version: 0.9.3 By: Bill Thibault E-mail: tebo@idiom.com Web page: Available Release Date: Available Now	Info Last Modified: 2/8/99 Requires BeOS version: R3 PPC, R3 Intel, R4 PPC License: Freeware Cost: 0 Source Available?: No
R3-PPC Download / alt. (300K kb) R4-PPC Download (300K kb)	R3-Intel Download / alt. (300K kb)

Grabbo uses a realtime computer vision algorithm to generate MIDI 
commands that can be sent to external devices or to the BeOS internal 
MIDI synthesizer. Operating in realtime, Grabbo works with any video 
source, including broadcast television signals. Incoming video is 
analyzed and compared to stored video frames to compute MIDI values 
for output. Future versions of Grabbo will be able to send messages 
to any BeOS program, using BeOS inter-application messaging. 
 
Grabbo analyzes images based on the orientation of objects, 
rather than position. Two different algorithms are currently provided: 
one outputs an index based on the closest matching image in a set of 
stored video frames.  The other is a 3D interpolation scheme, which 
associates stored frames with points in 3D space, and computes a 
position between the points based on the similarity of the current 
video image to the keyframes.  Using BeOS inter-application messages 
from Grabbo, the current 3D position is displayed using OpenGL by a 
companion application, 3dReceiver. 
 
Grabbo requires a BeOS-supported video capture card, which currently 
includes most cards using a Bt848 chip, such as the Hauppauge WinTV. 
Grabbo also requires a video display card which supports BeOS 
BDirectWindow, which allows 30fps display of incoming video. 
External MIDI hardware is not required, but is needed to realize 
Grabbo's full potential as a MIDI controller: Grabbo can use the BeOS 
built-in synthesizer.

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