What do iteration numbers mean in the train logging?

[benda.k...@ustream.tv]

I get the following log lines while training tesseract:

At iteration 303839/569300/573167, Mean rms=0.777%, delta=2.588%, char train=7.443%, word train=13.343%, skip ratio=0.6%,  wrote checkpoint.

What do the first three numbers mean? Which is the real iteration number? And what are the others mean?

[Shree Devi Kumar]

See https://github.com/tesseract-ocr/tesseract/blob/3a7f5e4de459f4c64f36e08b18ce1b66b1fbc876/src/lstm/lstmtrainer.cpp#L410

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[bohdan.mo...@gmail.com]

Ok, it says it’s learning iteration, training iteration and sample iteration respectively. But what do those terms mean? How can one deduce an epoch?

[akmalkady]

I am looking for the same answer. What are learning iteration, training iteration, and sample iteration?

[Shree Devi Kumar]

https://tesseract-ocr.github.io/tessdoc/tess4/TrainingTesseract-4.00.html#iterations-and-checkpoints

Epoch size depends on your training data.  If you have 1000 lines of training data, then 1 epoch is 1000 iterations. If you have 50000 lines of training text, 1 epoch is 50000 iterations.

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