method: Sunshine_OCR2021-03-10

Authors: Sunshine AI Team

Affiliation: Sunshine Insurance Group

Description: We use rot-faster-rcnn/rot-mask-rcnn algorithm which adds rotated rectangle support based on faster-rcnn/mask-rcnn. Firstly ResNet50 backbone + rot-faster-rcnn is used to get a 98.5%+ baseline, then HRNet backone + rot-mask-rcnn +IOU loss + multiscale training&testing is used to get the final score. The data is preprocessed for scale alignment and only augmented by small rotations.
Note: No error fixing/excluding is done on the submit.