FAQ

How to install Ocropus on a Mac?

https://github.com/tmbdev/ocropy/blob/master/README_OSX.md

How to install Ocropus on windows?

https://github.com/tmbdev/ocropy/issues/73

When can colorful, grayscale or black-and-white images used?

• Binarization ocropus-nlbin: You can input colorful pictures and the output are a binarized black-white version .bin.png as well as a grayscale version .nrm.png.
• Page Segmentation ocropus-gpageseg: You can input a grayscale or black-and-white picture (any colorful picture will be automatically transformed to a grayscale picture). The output are by default black-and-white lines, but with the option --gray it is possible to output also grayscale lines.
• Text recognition ocropus-rpred: You can use either the binarized lines .bin.png or the grayscale lines .nrm.png.
• Training ocropus-rtrain: You can use either the binarized lines .bin.png or the grayscale lines .nrm.png.

Tips on the usage: ocropus-rtrain was intended to be used with grayscale, but ocropus-rpred was not. Grayscale images can be especially useful in cases where binarization leads to a loss of connectedness in glyph shapes.