ocr
Text Recognition API
OCR command line utility for macOS 10.15+. Utilizes the VNRecognizeTextRequest API.
- https://github.com/straussmaximilian/ocrmac/blob/main/ocrmac/ocrmac.py
- https://developer.apple.com/documentation/vision/recognizing_text_in_images#overview
- https://github.com/ughe/macocr/
print parameters
tesseract --print-parameters
just supply multiple 'parameter'/'config' files.
those files are in 'tessdata' folder. can be found with find / -name tessdata
in my case on OSX :
/usr/local/Cellar/tesseract-lang/4.0.0/share/tessdata
/usr/local/Cellar/tesseract/4.1.1/share/tessdata
/usr/local/share/tessdata
tesseract INPUT.JPG OUTPUT_BASE -l nld tsv get.images
get.images gives the intermediate/input image useful for debugging
tesseract INPUT.JPG OUTPUT_BASE -l nld tsv get.images
it writes to: tessinput.tif
more config files:
alto
ambigs.train
api_config
bigram
box.train
box.train.stderr
digits
get.images
hocr
inter
kannada
linebox
logfile
lstm.train
lstmbox
lstmdebug
makebox
pdf
quiet
rebox
strokewidth
tsv
txt
unlv
wordstrbox
tesseract in Python
#!/usr/bin/env python3
from PIL import Image
import pytesseract
print(pytesseract.image_to_data('filelist.txt'))
compressed pdf
- first compress images using mogrify -quality 40
- use tesseract with 'filelist.txt'
OCRAD
brew install ocrad
convert 14.16.12.png img.ppm
ocrad img.ppm > output.txt
or
brew install netpbm
pngtopnm filename.png | ocrad
tesseract
brew install tesseract
brew install tesseract-lang
tesseract NL-UtHUA_A356828_000002.jpg outfile -l nld tsv
tesseract NL-UtHUA_A356828_000002.jpg outfile -l nld pdf
other
- http://www.free-ocr.com/
- http://projectnaptha.com javascript library en chrome addon voor OCR van plaatjes - tip v Simon (d3d)
- tesseract