Many garbage detections after training cascaded rcnn for ship detection in satellite images

[FatmaMazen2021]

Thanks for your error report and we appreciate it a lot.

Checklist

1. I have searched related issues but cannot get the expected help.
2. I have read the FAQ documentation but cannot get the expected help.
3. The bug has not been fixed in the latest version.

Describe the bug

After training the cascaded rcnn model for ship detection in satellite images(Airbus Ship Detection dataset on Kaggle). When I tried to evaluate the model using inference_detector, I got many and many false-positive detections of score 5.10745943e-01. could you kindly tell me what may be the cause of such a problem?

1. What command or script did you run?

checkpoint_path = '/kaggle/working/mmdetection/epoch_12.pth' ###########1. checkpoint path
config_path = '/kaggle/working/mmdetection/job4_cascade_rcnn_x101_32x4d_fpn_1x_coco.py'##########2.config_path

model = init_detector(config_path, checkpoint_path, device='cpu') ################3.init_detector
model.CLASSES = ('ship', )###################################4.Define classses
model.to(device)
model.eval()
model.PRETRAINED = None
#model.test

test a single image

img = f'../input/airbus-coco-dataset-v9/val2017/02bd7e3d1.jpg'
result = inference_detector(model, img)

2. Did you make any modifications on the code or config? Did you understand what you have modified?

3. What dataset did you use?
   Airbus ship detection
   Environment

4. Please run python mmdet/utils/collect_env.py to collect necessary environment information and paste it here.
   /opt/conda/lib/python3.7/site-packages/torch/cuda/init.py:52: UserWarning: CUDA initialization: Found no NVIDIA driver on your system. Please check that you have an NVIDIA GPU and installed a driver from http://www.nvidia.com/Download/index.aspx (Triggered internally at /pytorch/c10/cuda/CUDAFunctions.cpp:100.)
   return torch._C._cuda_getDeviceCount() > 0
   fatal: not a git repository (or any parent up to mount point /kaggle)
   Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
   sys.platform: linux
   Python: 3.7.10 | packaged by conda-forge | (default, Feb 19 2021, 16:07:37) [GCC 9.3.0]
   CUDA available: False
   GCC: gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
   PyTorch: 1.7.0+cu110
   PyTorch compiling details: PyTorch built with:

• GCC 7.3
• C++ Version: 201402
• Intel(R) Math Kernel Library Version 2020.0.0 Product Build 20191122 for Intel(R) 64 architecture applications
• Intel(R) MKL-DNN v1.6.0 (Git Hash 5ef631a030a6f73131c77892041042805a06064f)
• OpenMP 201511 (a.k.a. OpenMP 4.5)
• NNPACK is enabled
• CPU capability usage: AVX2
• Build settings: BLAS=MKL, BUILD_TYPE=Release, CXX_FLAGS= -Wno-deprecated -fvisibility-inlines-hidden -DUSE_PTHREADPOOL -fopenmp -DNDEBUG -DUSE_FBGEMM -DUSE_QNNPACK -DUSE_PYTORCH_QNNPACK -DUSE_XNNPACK -DUSE_VULKAN_WRAPPER -O2 -fPIC -Wno-narrowing -Wall -Wextra -Werror=return-type -Wno-missing-field-initializers -Wno-type-limits -Wno-array-bounds -Wno-unknown-pragmas -Wno-sign-compare -Wno-unused-parameter -Wno-unused-variable -Wno-unused-function -Wno-unused-result -Wno-unused-local-typedefs -Wno-strict-overflow -Wno-strict-aliasing -Wno-error=deprecated-declarations -Wno-stringop-overflow -Wno-psabi -Wno-error=pedantic -Wno-error=redundant-decls -Wno-error=old-style-cast -fdiagnostics-color=always -faligned-new -Wno-unused-but-set-variable -Wno-maybe-uninitialized -fno-math-errno -fno-trapping-math -Werror=format -Wno-stringop-overflow, PERF_WITH_AVX=1, PERF_WITH_AVX2=1, PERF_WITH_AVX512=1, USE_CUDA=ON, USE_EXCEPTION_PTR=1, USE_GFLAGS=OFF, USE_GLOG=OFF, USE_MKL=ON, USE_MKLDNN=ON, USE_MPI=OFF, USE_NCCL=ON, USE_NNPACK=ON, USE_OPENMP=ON,

TorchVision: 0.8.1+cu110
OpenCV: 4.5.2
MMCV: 1.3.8
MMCV Compiler: GCC 7.3
MMCV CUDA Compiler: 11.0
MMDetection: 2.14.0+
3. You may add addition that may be helpful for locating the problem, such as
- How you installed PyTorch [e.g., pip, conda, source]
- Other environment variables that may be related (such as $PATH, $LD_LIBRARY_PATH, $PYTHONPATH, etc.)

Error traceback
If applicable, paste the error trackback here.

A placeholder for trackback.

Bug fix
If you have already identified the reason, you can provide the information here. If you are willing to create a PR to fix it, please also leave a comment here and that would be much appreciated!

[FatmaMazen2021]

Fixed by setting min_box_size=1 instead of 0