【python】PythonでOCRやってみた（PyOCR、tesseract）

$ conda install -c conda-forge tesseract

$ pip install pyocr

from PIL import Image
import sys

import pyocr
import pyocr.builders

tools = pyocr.get_available_tools()
if len(tools) == 0:
    print("No OCR tool found")
    sys.exit(1)
# The tools are returned in the recommended order of usage
tool = tools[0]
print("Will use tool '%s'" % (tool.get_name()))
# Ex: Will use tool 'libtesseract'

langs = tool.get_available_languages()
print("Available languages: %s" % ", ".join(langs))
lang = langs[0]
print("Will use lang '%s'" % (lang))
# Ex: Will use lang 'fra'
# Note that languages are NOT sorted in any way. Please refer
# to the system locale settings for the default language
# to use.

Will use tool 'Tesseract (sh)'
 Available languages: afr, amh, ara, asm, aze, aze_cyrl, bel, ben, bod, bos, bre, bul, cat, ceb, ces, chi_sim, chi_sim_vert, chi_tra, chi_tra_vert, chr, cos, cym, dan, deu, div, dzo, ell, eng, enm, epo, est, eus, fao, fas, fil, fin, fra, frk, frm, fry, gla, gle, glg, grc, guj, hat, heb, hin, hrv, hun, hye, iku, ind, isl, ita, ita_old, jav, jpn, jpn_vert, kan, kat, kat_old, kaz, khm, kir, kmr, kor, kor_vert, lao, lat, lav, lit, ltz, mal, mar, mkd, mlt, mon, mri, msa, mya, nep, nld, nor, oci, ori, osd, pan, pol, por, pus, que, ron, rus, san, script/Arabic, script/Armenian, script/Bengali, script/Canadian_Aboriginal, script/Cherokee, script/Cyrillic, script/Devanagari, script/Ethiopic, script/Fraktur, script/Georgian, script/Greek, script/Gujarati, script/Gurmukhi, script/HanS, script/HanS_vert, script/HanT, script/HanT_vert, script/Hangul, script/Hangul_vert, script/Hebrew, script/Japanese, script/Japanese_vert, script/Kannada, script/Khmer, script/Lao, script/Latin, script/Malayalam, script/Myanmar, script/Oriya, script/Sinhala, script/Syriac, script/Tamil, script/Telugu, script/Thaana, script/Thai, script/Tibetan, script/Vietnamese, sin, slk, slv, snd, spa, spa_old, sqi, srp, srp_latn, sun, swa, swe, syr, tam, tat, tel, tgk, tha, tir, ton, tur, uig, ukr, urd, uzb, uzb_cyrl, vie, yid, yor
 Will use lang 'afr'

from PIL import Image
import sys

import pyocr
import pyocr.builders

tools = pyocr.get_available_tools()
tool = tools[0]
txt = tool.image_to_string(
    Image.open('test.jpg'),
    lang="jpn",
    builder=pyocr.builders.TextBuilder(tesseract_layout=6)
)

print(txt)

tools = pyocr.get_available_tools()

tool = tools[0]

txt = tool.image_to_string(
    Image.open('test.jpg'),
    lang="jpn",
    builder=pyocr.builders.TextBuilder(tesseract_layout=6)
)

$ tesseract --help-extra

Page segmentation modes:
   0    Orientation and script detection (OSD) only.
   1    Automatic page segmentation with OSD.
   2    Automatic page segmentation, but no OSD, or OCR. (not implemented)
   3    Fully automatic page segmentation, but no OSD. (Default)
   4    Assume a single column of text of variable sizes.
   5    Assume a single uniform block of vertically aligned text.
   6    Assume a single uniform block of text.
   7    Treat the image as a single text line.
   8    Treat the image as a single word.
   9    Treat the image as a single word in a circle.
  10    Treat the image as a single character.
  11    Sparse text. Find as much text as possible in no particular order.
  12    Sparse text with OSD.
  13    Raw line. Treat the image as a single text line,
        bypassing hacks that are Tesseract-specific.

三 ウィキペディア                  Q
 Python
 汎用の高しベルプログラミング言語
 入                            反 〆
 にの項目では、 プログラミング言語について説明していま
 す。その他の用法については「パイソン」をご覧ください。
 Python (パイソン) はインタープリタ型の高水準汎用
 プログラミング言語である。グイド・ヴァン・ロッサム
 により創り出され、1991年に最初にリリースされた
 Pythonの設計哲学は、有意なホワイトスペース(オフサ
 イドルール)の顕著な使用によってコードの可読性を重視
 している。その言語構成とオブジェクト指向のアプロー
 チは、プログラマが小規模なプロジェクトから大規模な
 プロジェクトまで、明確で論理的なコードを書くのを支
 援することを目的としている。