Incorporation Of Rejection Criterion - A Novel Technique For Evaluating Semantic Segmentation Systems

Semantic segmentation `SS' evaluation metrics are great tools to assess systems' performance in terms of pixels' accuracy and the alignment of segments. Standard metrics ignore pixels' confidence scores which can carry useful information. Pixels' scores represent the level of confidence of the system for assigning class labels to image pixels. However, it has not been utilised by any evaluating metric for semantic segmentation systems. We propose to incorporate pixels' confidence scores with existing metrics to gain better insights into systems' behaviours. Results show the usefulness of the introduced approach to utilise the pixels' scores in the evaluation process. Besides, using pixels' scores thresholding can help to enhance the system performance on a specific task or objects of a particular size.