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alicevision / CCTag

Detection of CCTag markers made up of concentric circles.
https://cctag.readthedocs.io
Mozilla Public License 2.0
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Tag detection is very slow (CUDA 11.1, Windows 10) #172

Closed antithing closed 2 years ago

antithing commented 3 years ago

I have this code built under windows, with CUDA 11.1. The lib compiles, and so does teh 'detection' application.

When i run the detection on the sample image using:

detection -n 3 -i sample/01.png

It finds the markers and displays them, but it takes:

Total time: 5.103234s wall, 5.218750s user + 0.000000s system = 5.218750s CPU (102.3%)

more than five seconds! is this expected? I am looking to run this code in realtime (50fps)

Am i doing something wrong? Can i speed up the tag detection?

Thank you.

simogasp commented 3 years ago

try detection -n 3 -i sample/01.png --use-cuda see here https://github.com/alicevision/CCTag/blob/develop/src/applications/detection/CmdLine.cpp#L44

antithing commented 3 years ago

Ah thank you! This has it running at around 130ms for the sample image, on a GTX 1080.

Aside from resizing the image, is there any other tweaks to make to speed up the functions?

Thanks again!

simogasp commented 3 years ago

try with a video, because on a single image there might be some overheads involved I guess

antithing commented 3 years ago

Okay thanks, i will try it.

Just so i hav realistic expectations, what is the top speed of this code, roughly, at 1920 x 1080 image size?

simogasp commented 3 years ago

normally it should be real-time with FullHD videos

antithing commented 3 years ago

Hi again, I am testing with a video file (1920 x 1080) with three markers visible. Using CUDA, on a GTX 1080 card, I still see slow frame times (150 - 230 ms)

The log is:

`#frame 333 Detected 5 candidates 660.546 667.647 0 1 1003.29 682.542 9 1 1354.46 698.786 14 1 1354.4 698.556 14 -4 1354.6 698.46 14 -4

3 markers detected and identified Times passed in milliseconds: 213.893 Loading image 334 into TagPipe 0 D:\Markers\CCTag\CCTag-develop\src\cctag\Detection.cpp:861 Found more than 60 (62) markers D:/Markers/CCTag/CCTag-develop/src/./cctag/cuda/pinned_counters.cu:134 called from D:\Markers\CCTag\CCTag-develop\src\cctag\CCTag.cpp:109 Hard-coded number of Nearyby Points in pinned memory is too small. Increase and recompile. D:/Markers/CCTag/CCTag-develop/src/./cctag/cuda/pinned_counters.cu:134 called from D:\Markers\CCTag\CCTag-develop\src\cctag\CCTag.cpp:109 Hard-coded number of Nearyby Points in pinned memory is too small. Increase and recompile.

==== Uploading 62 tags ==== Total time: 0.197040s wall, 0.468750s user + 0.062500s system = 0.531250s CPU (269.6%)`

Is there anything I can do to speed this up? I am aiming for 60fps...

Thank you!

github-actions[bot] commented 2 years ago

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