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nanoporetech / scrappie

Scrappie is a technology demonstrator for the Oxford Nanopore Research Algorithms group
Mozilla Public License 2.0
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Masking Event Detection #41

Closed vickymzheng closed 3 years ago

vickymzheng commented 3 years ago

Hello, I am currently interested in using the code that Scrappie uses for event detection. There is a portion in the event detection source code that mentions being masked out (event_detection.c line 139). It is also mentioned in the detector structures. Could someone explain what this masking is in the context of event detection? Thanks!

tmassingham-ont commented 3 years ago

Hello. The event detector has two sliding-window tests, one over a short window and one over a longer window. When an event passes through the windows, one test may exceed its threshold a sample or two after the other. To prevent two events being called for the same actual event, the tests are prevented from creating new events ("masked") for a short period after a new event has been detected.