ocropus-rpred estrate option throws exceptions

[wallclock]

Got the following exception when estrate is used.

Without my-line.gt.txt:

$ ocropus-rpred --estrate -m en-default.pyrnn.gz my-line.png 
INFO:  
INFO:  ########## /usr/local/bin/ocropus-rpred --estrate -m en-default.pyrnn.g
INFO:  
INFO:  #inputs1
# loading object en-default.pyrnn.gz
Traceback (most recent call last):
  File "/usr/local/bin/ocropus-rpred", line 289, in <module>
    print_info("%.5f"%(terr*1.0/total) + " " + terr+ " " + total + " " + args.model)
ZeroDivisionError: float division by zero

With my-line.gt.txt:

$ ocropus-rpred --estrate -m en-default.pyrnn.gz my-line.png 
INFO:  
INFO:  ########## /usr/local/bin/ocropus-rpred --estrate -m en-default.pyrnn.g
INFO:  
INFO:  #inputs1
# loading object en-default.pyrnn.gz
INFO:    6   6 my-line.png:I 5 $ 4 d L
Traceback (most recent call last):
  File "/usr/local/bin/ocropus-rpred", line 289, in <module>
    print_info("%.5f"%(terr*1.0/total) + " " + terr+ " " + total + " " + args.model)
TypeError: ufunc 'add' did not contain a loop with signature matching types dtype('S32') dtype('S32') dtype('S32')

$ python --version
Python 2.7.12

[zuphilip]

This looks like a bug, also my error message looks a little different. Can you provide as your example (bin.png and gt.txt file)? What version of numpy are you using? You can find out by the following python commands:

import numpy
numpy.version.version

[wallclock]

Here you go:

output.gt.txt

>>> import numpy
>>> numpy.version.version
'1.11.2'

Had the same issue with numpy 1.11.0 provided by ubuntu.

[zuphilip]

This issue will probably be solved by #124.

[zuphilip]

Okay, that PR is now merged and it should solve this issue. @wallclock You can update to the newest version and test it again. Can you confirm that it is now working?

[wallclock]

Yes it is now working, thanks!

[tmbdev]

Note that the default model is not trained at all for handwriting.