Progress report

Last week I was working on two tasks: implementing required code changes in the Trajectory component and second is writing some ideas for the technical report.

Hacking progress:

• Time-series normalization: Initially I was normalizing the time series by simply dividing all values by the maximal one, last week I've changed this method to more appropriate one by following the method suggested by Dina Q. Goldin and Paris C. Kanellakis in the "On similarity queries for time-series data: Constraint specification and implementation" chapter of "Principles and Practice of Constraint Programming — CP '95" book.


• DTW improvement: I'm trying to move from the original DTW implementation towards the more customizable implementation using step functions suggested by Sakoe-Chiba:
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  Unfortunately hack is no moving fast, - I am working on the architecture design to make step and constraints functions pluggable into the "generic DTW" code. I think this is the most elegant solution. In the future it'll allow to plug any user-configured function in the code. Really want to benchmark the performance of all the options since for the speech and writing recognition it worked well.