Fine-tuned Pre-trained Mask R-CNN Models for Surface Object Detection

This study evaluates road surface object detection tasks using four Mask R-CNN models as a pre-study of surface deterioration detection of stone-made archaeological objects. The models were pre-trained and fine-tuned by COCO datasets and 15,188 segmented road surface annotation tags. The quality of the models were measured using Average Precisions and Average Recalls. Result indicates substantial number of counts of false negatives, i.e. left detection and unclassified detections. A modified confusion matrix model to avoid prioritizing IoU is tested and there are notable true positive increases in bounding box detection, but almost no changes in segmentation masks.

Haruhiro Fujita, Masatoshi Itagaki, Kenta Ichikawa, Yew Kwang Hooi, Kazutaka Kawano, Ryo Yamamoto · 2020