MATLAB abandoned Object Detection

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Monika Mehta 2019-8-28

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https://ww2.mathworks.cn/matlabcentral/answers/477849-matlab-abandoned-object-detection

评论： Monika Mehta 2019-8-30

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I am working on Abandoned Object Detection. While testing the MATLAB AOD code, I found that a parameter alarmCOunt is used as 45.

I want to know on which basis it is set as 45.

Secondly, it is used in a function videoobjtracker() to return Count. To understand its depth I looked for the function and functionality but didn't find any.

I am working on R2013a please help with these concerns.

For more reference I enclosed the snippets with red marks.

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Steven Lord 2019-8-28

I'm not certain but I suspect it was chosen to make the example (specifically the video of the example in action linked from its documentation page) run in a short amount of time. The video only lasts 34 seconds, so having the example wait to declare an object abandoned only if it is stationary for 30 seconds probably would have required the video to run for several minutes during which time there may be very little action present.

In addition I could also see calling an object "abandoned" after a second and a half useful in certain circumstances. In the case of this video, alerting the passenger hurrying to board the train on the left side of the figure "You forgot your package on the seat" while they are still on the train platform near the package so they can return quickly to pick it up is useful.

If you were to wait for 30 seconds, the train with the passenger on board may have departed. Given the schedule of the trains at the Natick Center commuter rail station where that video was recorded, returning from the next station where the train stops to retrieve the package could delay the passenger's arrival in Boston by minutes or hours.

Steven Lord 2019-8-29

On the other hand, if you were monitoring a parking lot a car might have to remain in place for days or weeks to be considered abandoned. Someone who went to a shopping center or mall and had lunch or dinner at a restaurant inside then spent a couple hours shopping at first one store then another could leave their vehicle all day. Someone who drove to the airport to fly for work or for a vacation could leave their vehicle for several weeks.

Monika Mehta 2019-8-30