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We provide our implementation of PIX2NVS, a tool for converting pixel frames to brightness spike events as generated by neuromorphic vision sensors (e.g. DAVIS-240).
A full description of the operation of this tool can be found in our paper:
[1] Yin Bi, Yiannis Andreopoulos, ‘PIX2NVS: Parameterized Conversion of Pixel-domain Video Frames to Neuromorphic Vision Streams’ [C], IEEE International Conference on Image Processing (ICIP), Sept. 17-20, 2017, Beijing, China
If you use the code in this repository, please cite the paper above. This tool is provided under the [GNU General Public Use v3.0 license].
Building Source
All dependencies are located in the source folder. To build from source, change your working directory to this repository's home folder and run:
g++ -o pix2nvs src/*.cpp # to build from source
./pix2nvs # to run using default parameters
Running Options
Option
Description
-r or --reference
set to (1, 2, or 3) to specify one of the reference frame update methods.
-m or --maxevents
will specify the maximum number of events generated between two frames
-b or --blocksize
will set the block size for local inhibition
-a or --adaptive
will set the co-efficient shift for adaptive thresholding, set to (0) to disable
The reference frame update option can be set to any of the following:
r
Reference Frame Update Method
1
copy last frame from source
2
update reference frame using only generated events, with history decay
3
update reference frame using only generated events, without history decay
Example Usage
To extract events from videos located in the input folder:
./pix2nvs -r 3 -a 0 -b 4
All outputs will be located in the folder "Events". The output from PIX2VNS using these parameters is visualized in the following figure:
