[IEEE 2019 IEEE International Conferences on Ubiquitous Computing & Communications (IUCC) and Data Science and Computational Intelligence (DSCI) and Smart Computing, Networking and Services (SmartCNS) - Shenyang, China (2019.10.21-2019.10.23)] 2019 IEEE International Conferences on Ubiquitous Computing & Communications (IUCC) and Data Science and Computational Intelligence (DSCI) and Smart Computing, Networking and Services (SmartCNS) - An Evaluation Standard and Loss Function Applied to the Semantic Segmentation of Large Depth of Field Pictures