liuqinglong110 / nanodet-plus-rk3588

deploy nanodet-plus model on rk3588

rk3588 nanodet-plus npu2

Deploy nanodet-plus model on rk3588.

1. Change parameters for your models in include/postprocess.h.

   example: nanodet-EfficientNet-Lite2_512

   #define REG_MAX 10

   #define STRIDE_SIZE 3

   If you develop nanodet-plus-m-1.5x_416, the parameters shoule be:

   #define REG_MAX 7

   #define STRIDE_SIZE 4

2. usage:

   ./build-linux_RK3588.sh

   ./install/rknn_nanodet_demo_Linux/rknn_nanodet_demo nanodet-EfficientNet-Lite2_512.rknn model/bus.jpg

3. For speeding up postprocess, I used unsigmoid threshhold in postprocess.cc, because sigmoid function is time consuming.

   line255 : float unsigmod_conf_thresh = unsigmoid(conf_threshold);

NOTE: y = unsigmoid(x) x' = sigmoid(y)

  x and x' are incomplete equality.