Meeting Agenda

Date:	August 2, 2018
Location:	DC 1331
Time:	1:30
Chair:	Craig Kaplan

1. Acceptance of the Agenda - additions or deletions

2. Coffee Hour

Coffee hour last week:: Reza - thanks!
Coffee hour this week:: Volunteers?
Coffee hour next week:: Volunteers?

3. Forthcoming

Date:	August 9, 2018	August 16, 2018	August 23, 2018	August 30, 2018
Location:	DC 1331 1:30	SIGGRAPH - No meeting!	DC 1331 1:30 DC 1331 1:30	DC 1331 1:30
Chair:	Christopher Batty		Andrew Tinits	JC Chang
Technical Presentation:	Reza Aditya Saputra		Andrew Tinits	Christopher Batty

4. Technical Presentation

Greg Philbrick	Title : SpeedSeg: A technique for segmenting pen strokes using pen speed Abstract: We present SpeedSeg, a technique for segmenting pen strokes into lines and arcs. The technique uses pen speed information to help infer the segmentation intended by the drawer. To begin, an initial set of candidate segment points is identified. This set includes speed minima below a threshold, and curvature maxima at which the pen speed is also below a threshold. The ink between each pair of consecutive segment points is then classified as either a line or an arc, depending on which fits best. Next, a feedback process is employed, and segments are judiciously merged and split as necessary to improve the quality of the segmentation. In user studies, SpeedSeg performed accurately for new users. The studies also demonstrated that SpeedSeg's accuracy is surprisingly insensitive to the values of many of the empirical parameters used by the technique. However, it is still possible to quickly tune the system to optimize performance for a given user. Finally, SpeedSeg outperformed a state-of-the-art segmentation algorithm.

Greg Philbrick

Title : SpeedSeg: A technique for segmenting pen strokes using pen speed
Abstract:
We present SpeedSeg, a technique for segmenting pen strokes into lines and arcs. The technique uses pen speed information to help infer the segmentation intended by the drawer. To begin, an initial set of candidate segment points is identified. This set includes speed minima below a threshold, and curvature maxima at which the pen speed is also below a threshold. The ink between each pair of consecutive segment points is then classified as either a line or an arc, depending on which fits best. Next, a feedback process is employed, and segments are judiciously merged and split as necessary to improve the quality of the segmentation. In user studies, SpeedSeg performed accurately for new users. The studies also demonstrated that SpeedSeg's accuracy is surprisingly insensitive to the values of many of the empirical parameters used by the technique. However, it is still possible to quickly tune the system to optimize performance for a given user. Finally, SpeedSeg outperformed a state-of-the-art segmentation algorithm.

5. Discussion Items

6. Action Items

Power outages in August: Saturday August 25th and overnight on August 29 (7PM to 3AM)

7. Lab Events

8. Conferences and Special Journal Issues

SIGGRAPH 2018, August 12-16, 2018.

9. Directors' Meeting

10. Seminars and Events

Tuesday, 31 July 2018, 11:00AM - Computer Science (Cryptography, Security, and Privacy (CrySP) Group), DC 1304: Vern Paxson: -- Finding Very Damaging Needles in Very Large Haystacks
Thursday, 2 August 2018, 4:00PM - Statistics & Actuarial Science , M3-3127: Daniel Farewell: -- No Such Thing as Missing Data
Friday, 3 August 2018, 11:00AM - Computer Science (Artificial Intelligence Lab), DC 2310: Royal Sequiera: -- Simple Convolutional Neural Networks with Linguistically-Annotated Input for Answer Selection in Question Answering
Friday, 3 August 2018, 3:30PM - Combinatorics and Optimization , MC 5501: Federico Ardila: -- The geometry of matroids