Mean file "mean.ppm" of deepstream

In “deepstream_test2” demo, there secondary engine of classification have a mean file named “mean.ppm”. My mean value of classification model generally three numbers,such as 112 117 130. I want to konw how “mean.ppm” generated? Thanks

If you train with DIGITs , it should be generated automatically. if tensorflow or pytorch, mean value usually set as 128.

@amycao The secondary classifier model needs input mean file “mean.ppm”. I cann’t set value as 128 directly. Is there any suggestions?