High accuracy 0.843 in train_msc val?

[mokii]

Train for 20K iterations with original parameters in train_msc.py with about 10K VOC training set and val the model.ckpt-8000 for 1449 val images but got the high accuracy:0.843?
The training loss is around 1.5 and it seems very high. Is it rational?
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Mean IoU: 0.843

[DrSleep]

Did you initialise from the downloaded model?
If so, the released model by DeepLab was pre-trained on trainval, which explains high accuracy on validation.