关键词: 大熊猫, YOLOv3, Mask R-CNN, 双模型融合, 图像分割

Abstract: In the ex situ conservation and population management of giant pandas (Ailuropoda melanoleuca), timely and rapid individual identification and behavior monitoring play a crucial role in health supervision. The health status of captive giant pandas is usually observed by specialized breeders, which have high labor costs, low efficiency, and lack of timeliness. Therefore, efficient and cheap image-based identity recognition and behavior analysis has become a new development trend. Existing studies have proposed to realize it by detecting and analyzing facial images of giant pandas. However, this type of method still has the problem of insufficient detection accuracy, which makes it difficult to improve the recognition performance. We propose a dual model fusion method based on YOLOv3 and Mask R-CNN to achieve the segmentation and accurate detection of giant panda head images. It includes three parts:YOLOv3 completes head detection, Mask R-CNN completes panda contour segmentation, and then fuses the outputs of the two models. Experimental results show that the accuracy of head detection, giant panda and head contour segmentation are 82. 6%, 95. 2%, and 87. 1%, respectively. Our method has high detection and segmentation accuracy for the giant panda head images. It provides help for individual identification and gender classification of giant pandas and provides technical reference for behavior analysis.

Key words: Giant panda, YOLOv3, Mask R-CNN, Dual model fusion, Image segmentation