【Python】テキスト検出とOCR（光学的文字認識）ができる「keras-ocr」のインストールについて解説しています。
「keras-ocr（https://github.com/faustomorales/keras-ocr）」は、KerasのCRNN実装と公開されているCRAFTテキスト検出モデルを少し洗練させてパッケージ化したものです。
■Python
今回のPythonのバージョンは、「3.8.5」を使用しています。（Windows10）（pythonランチャーでの確認）
■keras-ocrをインストールする
keras-ocrをインストールを行いますが、今回はpipを経由してインストールを行うので、まずWindowsのコマンドプロンプトを起動します。
pip install keras-ocr
起動後、上記のコマンドを入力し、Enterキーを押します。
なお、今回は、pythonランチャーを使用しており、Python Version 3.8.5にインストールを行うために、バージョンの切り替えを行います。
py -3.8 -m pip install keras-ocr
切り替えるために、上記のコマンドを入力し、Enterキーを押します。
Defaulting to user installation because normal site-packages is not writeable Collecting keras-ocr Downloading keras_ocr-0.9.1-py3-none-any.whl (42 kB) ---------------------------------------- 42.3/42.3 kB 1.0 MB/s eta 0:00:00 Collecting essential_generators Downloading essential_generators-1.0-py3-none-any.whl (9.5 MB) ---------------------------------------- 9.5/9.5 MB 3.1 MB/s eta 0:00:00 Requirement already satisfied: fonttools in c:\users\user_\appdata\roaming\python\python38\site-packages (from keras-ocr) (4.30.0) Collecting shapely Downloading Shapely-1.8.2-cp38-cp38-win_amd64.whl (1.3 MB) ---------------------------------------- 1.3/1.3 MB 5.1 MB/s eta 0:00:00 Collecting editdistance Downloading editdistance-0.6.0-cp38-cp38-win_amd64.whl (24 kB) Collecting pyclipper Downloading pyclipper-1.3.0.post3-cp38-cp38-win_amd64.whl (95 kB) ---------------------------------------- 95.2/95.2 kB 5.7 MB/s eta 0:00:00 Collecting efficientnet==1.0.0 Downloading efficientnet-1.0.0-py3-none-any.whl (17 kB) Requirement already satisfied: tqdm in c:\users\user_\appdata\roaming\python\python38\site-packages (from keras-ocr) (4.60.0) Requirement already satisfied: validators in c:\users\user_\appdata\roaming\python\python38\site-packages (from keras-ocr) (0.18.2) Collecting imgaug Downloading imgaug-0.4.0-py2.py3-none-any.whl (948 kB) ---------------------------------------- 948.0/948.0 kB 5.5 MB/s eta 0:00:00 Requirement already satisfied: scikit-image in c:\users\user_\appdata\roaming\python\python38\site-packages (from efficientnet==1.0.0->keras-ocr) (0.18.3) Collecting keras-applications<=1.0.8,>=1.0.7 Downloading Keras_Applications-1.0.8-py3-none-any.whl (50 kB) ---------------------------------------- 50.7/50.7 kB ? eta 0:00:00 Requirement already satisfied: matplotlib in c:\users\user_\appdata\roaming\python\python38\site-packages (from imgaug->keras-ocr) (3.4.2) Requirement already satisfied: numpy>=1.15 in c:\users\user_\appdata\roaming\python\python38\site-packages (from imgaug->keras-ocr) (1.21.5) Requirement already satisfied: scipy in c:\users\user_\appdata\roaming\python\python38\site-packages (from imgaug->keras-ocr) (1.7.0) Requirement already satisfied: imageio in c:\users\user_\appdata\roaming\python\python38\site-packages (from imgaug->keras-ocr) (2.9.0) Requirement already satisfied: six in c:\users\user_\appdata\roaming\python\python38\site-packages (from imgaug->keras-ocr) (1.12.0) Requirement already satisfied: opencv-python in c:\users\user_\appdata\roaming\python\python38\site-packages (from imgaug->keras-ocr) (4.5.2.54) Requirement already satisfied: Pillow in c:\users\user_\appdata\roaming\python\python38\site-packages (from imgaug->keras-ocr) (9.1.1) Requirement already satisfied: decorator>=3.4.0 in c:\users\user_\appdata\roaming\python\python38\site-packages (from validators->keras-ocr) (5.1.1) Requirement already satisfied: h5py in c:\users\user_\appdata\roaming\python\python38\site-packages (from keras-applications<=1.0.8,>=1.0.7->efficientnet==1.0.0->keras-ocr) (3.1.0) Requirement already satisfied: networkx>=2.0 in c:\users\user_\appdata\roaming\python\python38\site-packages (from scikit-image->efficientnet==1.0.0->keras-ocr) (2.6.3) Requirement already satisfied: tifffile>=2019.7.26 in c:\users\user_\appdata\roaming\python\python38\site-packages (from scikit-image->efficientnet==1.0.0->keras-ocr) (2021.11.2) Requirement already satisfied: PyWavelets>=1.1.1 in c:\users\user_\appdata\roaming\python\python38\site-packages (from scikit-image->efficientnet==1.0.0->keras-ocr) (1.1.1) Requirement already satisfied: pyparsing>=2.2.1 in c:\users\user_\appdata\roaming\python\python38\site-packages (from matplotlib->imgaug->keras-ocr) (2.3.1) Requirement already satisfied: cycler>=0.10 in c:\users\user_\appdata\roaming\python\python38\site-packages (from matplotlib->imgaug->keras-ocr) (0.10.0) Requirement already satisfied: kiwisolver>=1.0.1 in c:\users\user_\appdata\roaming\python\python38\site-packages (from matplotlib->imgaug->keras-ocr) (1.3.1) Requirement already satisfied: python-dateutil>=2.7 in c:\users\user_\appdata\roaming\python\python38\site-packages (from matplotlib->imgaug->keras-ocr) (2.8.0) Installing collected packages: pyclipper, essential_generators, shapely, editdistance, keras-applications, imgaug, efficientnet, keras-ocr Successfully installed editdistance-0.6.0 efficientnet-1.0.0 essential_generators-1.0 imgaug-0.4.0 keras-applications-1.0.8 keras-ocr-0.9.1 pyclipper-1.3.0.post3 shapely-1.8.2
Enterキーを押すと、インストールが開始され、上記のように「Successfully installed」と表示されます。これが表示されれば、keras-ocrが正常にインストールされたことになります。
なお、今回はkeras-ocrのバージョン0.9.1をインストールしました。
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