Week 08 - "Leap Week"

0225

The demo program "moveresize" is able to work with laser. Thresholding of image affects the detection of laser blobs. Lower thresholds makes the laser dot highly visible but introduces more false positives. With higher thresholds, the laser "drops" once in awhile, so I've added loss tolerance for two frames after my program doesnt pick up the laser.

Kevin simplified Lightdraw into three particular areas the team has to look into.
1. Full screen program, probably with transparency overlay. With graffiti, and gestures.
2. Window interaction.
3. Contextual interaction.



0226

Quickly put together an extremely simply gesture recognition for moveresize. Though it is simple, it is extremely reliable as it does corner detection using Douglas-Peucker algorithm with high rate of success.

Increased the effective area of the binarized pointer size to allow a margin of human error when user wants to initiate a pause (It is difficult to keep your hands still and focus the laser on a point).



0227

Went for this Apple talk in the morning that was about role of Apple computing in Science. We were introduced to specialised software available by Apple that is free, such as "stitching" your displays together or desktop sharing.



0228

Read up on Apple window manager programming. I think X11 windowing system would be a good choice as my SuSe development platform uses it natively and the Mac Pro has X11 as well.
I would want to achieve transparent window overlays and control event signals using X11.



0229

Taken OpenCV motion template apart in order to assess how well it can detect a (anti)clockwise motion detection. Even after removing the direction weights on motion history two or more frames ago, I am not able to get a reliable reading from the motion template. Humans cannot draw a perfect circle, and so the direction tangents do not change uniformly. This makes it difficult to determine when the circular motion starts or ends.