Have Any Friends Use This Code For Semantic Segmentation

Please click the follow link

This code for semantic segmentation. I can apply the code for VOC2012.
But I use it for the other dataset .for example,ISBI. The code , in another words, the neural net output a whole black image.why?

The Pascal VOC2012 dataset consists of “natural images”, while it seems the ISBI dataset is a medical image set.
Did you try to fine-tune the model or did you just use the pre-trained model for prediction?
Since the dataset for pre-training and your use case differs so much, I would definitely fine-tune the model.
You can find atutorial on transfer learning here.