Opencv Timers Cannot Be Started From Another Thread at Donna Champion blog

Opencv Timers Cannot Be Started From Another Thread. I don't use timer in my code but when it get error timers. when the canvas needs a repaint because the data has changed, the canvas uses a separate thread to render. i have a problem with opencv 2.4 when run on linux arm. the reason it is thread unsafe is because you are interacting with gui objects from the secondary thread. the problem is that you create the timer implicitly by the main thread when you create your thread object. but this sort of error/warning can easily occur if you create/instantiate objects that you have pointers to before. i ran both the opencv and qt libs under gdb and found out that the timer that was not terminated prior to exit from. Qt might use it for internal purposes.

python Timer counter of a ROI in opencv Stack Overflow
from stackoverflow.com

when the canvas needs a repaint because the data has changed, the canvas uses a separate thread to render. i have a problem with opencv 2.4 when run on linux arm. i ran both the opencv and qt libs under gdb and found out that the timer that was not terminated prior to exit from. the problem is that you create the timer implicitly by the main thread when you create your thread object. the reason it is thread unsafe is because you are interacting with gui objects from the secondary thread. Qt might use it for internal purposes. I don't use timer in my code but when it get error timers. but this sort of error/warning can easily occur if you create/instantiate objects that you have pointers to before.

python Timer counter of a ROI in opencv Stack Overflow

Opencv Timers Cannot Be Started From Another Thread Qt might use it for internal purposes. Qt might use it for internal purposes. I don't use timer in my code but when it get error timers. the reason it is thread unsafe is because you are interacting with gui objects from the secondary thread. but this sort of error/warning can easily occur if you create/instantiate objects that you have pointers to before. i have a problem with opencv 2.4 when run on linux arm. when the canvas needs a repaint because the data has changed, the canvas uses a separate thread to render. the problem is that you create the timer implicitly by the main thread when you create your thread object. i ran both the opencv and qt libs under gdb and found out that the timer that was not terminated prior to exit from.

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