Tesserocr gives incorrect orientation results with PSM.OSD_ONLY (and different results to command line version)

[dannyfriar]

The following code snippet from the pypi project gives an incorrect result after rotating the eurotext.tif image (from tests directory of repo). E.g. after rotating the image by 180 degrees:

from tesserocr import PyTessBaseAPI, PSM

with PyTessBaseAPI(psm=PSM.OSD_ONLY) as api:
    api.SetImageFile("/usr/src/tesseract/testing/eurotext.tif")

    os = api.DetectOS()
    print("Orientation: {orientation}\nOrientation confidence: {oconfidence}\n"
          "Script: {script}\nScript confidence: {sconfidence}".format(**os))

Result:

Orientation: 0
Orientation confidence: 0.0
Script: 2
Script confidence: nan

Running tesseract /usr/src/tesseract/testing/eurotext.tif- --psm 0 gives:

Orientation in degrees: 180
Rotate: 180
Orientation confidence: 28.28
Script: Latin
Script confidence: 6.05

Tesserocr: 2.4.1 OS: macOS 10.14.3

tesseract 4.1.0 leptonica-1.78.0 libgif 5.1.4 : libjpeg 9c : libpng 1.6.37 : libtiff 4.0.10 : zlib 1.2.11 : libwebp 1.0.3 : libopenjp2 2.3.1

[bertsky]

You have to load the osd model, otherwise OSD won't work. Also, you might need to set oem. Try:

from tesserocr import OEM
with PyTessBaseAPI(
    psm=PSM.OSD_ONLY,
    lang="osd",
    oem=OEM.TESSERACT_LSTM_COMBINED
) as api: