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Use better tesseract training dataset #459

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Dec 9, 2024
Merged

Use better tesseract training dataset #459

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0292dfe
Download tessdata-best instead of tessdata-fast
jonchang Dec 5, 2024
b888f33
Drop unused `cdifflib`
jonchang Dec 5, 2024
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10 changes: 7 additions & 3 deletions OCR/Dockerfile
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Original file line number Diff line number Diff line change
@@ -1,14 +1,18 @@
FROM python:3.10-bullseye
FROM python:3.10-slim

RUN apt-get update && apt-get install ffmpeg libsm6 libxext6 tesseract-ocr-eng tesseract-ocr -y
RUN apt-get update && apt-get install libgl1 tesseract-ocr-eng tesseract-ocr -y

# Use larger "best" training data, rather than "fast"
# Python one-liner because we don't have curl or wget
RUN python3 -c 'from urllib.request import urlopen; open("/usr/share/tesseract-ocr/5/tessdata/eng.traineddata", "wb").write(urlopen("https://github.com/tesseract-ocr/tessdata_best/raw/refs/heads/main/eng.traineddata").read())'

RUN pip install poetry

COPY /ocr /ocr
COPY poetry.lock .
COPY pyproject.toml .

RUN poetry install --without dev
RUN poetry install --only main && poetry cache list | xargs -n1 poetry cache clear --all

ENTRYPOINT ["poetry", "run", "api"]

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11 changes: 7 additions & 4 deletions OCR/dev-dockerfile
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@@ -1,12 +1,15 @@
FROM python:3.10-bullseye
FROM python:3.10-slim

RUN apt-get update && apt-get install ffmpeg libsm6 libxext6 tesseract-ocr-eng tesseract-ocr -y
RUN apt-get update && apt-get install libgl1 tesseract-ocr-eng tesseract-ocr -y

# Use larger "best" training data, rather than "fast"
# Python one-liner because we don't have curl or wget
RUN python3 -c 'from urllib.request import urlopen; open("/usr/share/tesseract-ocr/5/tessdata/eng.traineddata", "wb").write(urlopen("https://github.com/tesseract-ocr/tessdata_best/raw/refs/heads/main/eng.traineddata").read())'

RUN pip install poetry

COPY ./pyproject.toml /ocr/pyproject.toml
COPY ./poetry.lock /ocr/poetry.lock

WORKDIR /ocr
RUN poetry install

RUN poetry install && poetry cache list | xargs -n1 poetry cache clear --all
1 change: 1 addition & 0 deletions OCR/ocr/services/tesseract_ocr.py
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Expand Up @@ -36,6 +36,7 @@ def _guess_tessdata_path(wanted_lang="eng") -> bytes:
"/usr/local/share/tesseract/tessdata",
"/usr/share/tesseract/tessdata",
"/usr/share/tesseract-ocr/4.00/tessdata",
"/usr/share/tesseract-ocr/5/tessdata",
"/opt/homebrew/share/tessdata",
"/opt/local/share/tessdata",
]
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15 changes: 1 addition & 14 deletions OCR/poetry.lock
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3 changes: 1 addition & 2 deletions OCR/pyproject.toml
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Expand Up @@ -10,13 +10,12 @@ python = "^3.10"
numpy = "^1.26.4"
opencv-python = "^4.9.0.80"
levenshtein = "^0.25.1"
cdifflib = "^1.2.6"
fastapi = {extras = ["standard"], version = "^0.112.1"}
transformers = {extras = ["torch"], version = "^4.45.1"}
pillow = "^10.3.0"

datasets = "^3.0.1"
tesserocr = "^2.7.1"

[tool.poetry.group.dev.dependencies]
lxml = "^5.3.0"
docopt = "^0.6.2"
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