ilovin / Lstm_ctc_ocr
Use CTC + tensorflow to OCR
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-
old master:
- harder to converge compare to the beta version
- both standard ctc and warpCTC
- read data at once
-
dev:
- the pipline version of lstm_ctc_ocr, resize to same size
- use tf.records
-
beta (current):
- generate data on the fly
- deal with multi-width image, padding to same width
How to use
- ./train.sh
Dependency
- python 3
- tensorflow 1.0.1
- captcha
- warpCTC tensorflow_binding
Some details
The training data:
Notice that,
parameters can be found in ./lstm.yml(higher priority) and lib/lstm/utils/config.y
some parameters need to be fined tune:
- learning rate
- decay step & decay rate
- image_height
- optimizer?
in ./lib/lstm/utils/gen.py, the height of the images are the same, and I pad the width
to the same for each batch, so
if you want to use your own data, the height of the image shall be the same.
Result
The accurary can be more that 95%
Read this blog for more details and this blog for how to
use tf.nn.ctc_loss or warpCTC
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