1. 確認環境是否支持

我用的實踐環境：
一臺Windows7_x64，和一臺Windows10_x64
Python 3.8.5
pip 21.0.1
我是安裝的CPU版，對CUDA沒有特別要求。

2. 在PyCharm中創建一個新的工程

其中pip升級了一次，注意升級時要先把原來虛擬環境中的pip包刪除，否則更新不了。

3. 安裝PaddleOCR包

在虛擬環境中用pip安裝

pip install paddlepaddle -i https://mirror.baidu.com/pypi/simple

4. 驗證安裝

import paddleif __name__ == '__main__':paddle.utils.run_check()

5. 下載PaddleOCR repo代碼

可以用git clone（推薦）

git clone https://github.com/PaddlePaddle/PaddleOCR

也可以通svn checkout

svn co https://github.com/PaddlePaddle/PaddleOCR/trunk

在PyCharm中將PaddleOCR文件夾設置成源碼目錄

6. 安裝相關第三方庫

cd PaddleOCR pip install -r requirements.txt

安裝前可能需要修改一下倉庫地址：https://mirror.baidu.com/pypi/simple/

并且這一步驟依賴vc14編譯工具，否則會報錯：

可以按照提示從官方鏈接下載：https://visualstudio.microsoft.com/visual-cpp-build-tools/
然后雙擊安裝

相關第三方庫安裝完成后的效果如下圖：

(venv) D:\000\PaddleStudy\PaddleOCR>pip install -r requirements.txt Requirement already satisfied: shapely in d:\000\paddlestudy\venv\lib\site-packages (from -r requirements.txt (line 1)) (1.7.1) Requirement already satisfied: scikit-image==0.17.2 in d:\000\paddlestudy\venv\lib\site-packages (from -r requirements.txt (line 2)) (0.17.2) Requirement already satisfied: imgaug==0.4.0 in d:\000\paddlestudy\venv\lib\site-packages (from -r requirements.txt (line 3)) (0.4.0) Requirement already satisfied: pyclipper in d:\000\paddlestudy\venv\lib\site-packages (from -r requirements.txt (line 4)) (1.2.1) Requirement already satisfied: lmdb in d:\000\paddlestudy\venv\lib\site-packages (from -r requirements.txt (line 5)) (1.1.1) Requirement already satisfied: opencv-python==4.2.0.32 in d:\000\paddlestudy\venv\lib\site-packages (from -r requirements.txt (line 6)) (4.2.0.32) Requirement already satisfied: tqdm in d:\000\paddlestudy\venv\lib\site-packages (from -r requirements.txt (line 7)) (4.59.0) Requirement already satisfied: numpy in d:\000\paddlestudy\venv\lib\site-packages (from -r requirements.txt (line 8)) (1.19.3) Requirement already satisfied: visualdl in d:\000\paddlestudy\venv\lib\site-packages (from -r requirements.txt (line 9)) (2.1.1) Requirement already satisfied: python-Levenshtein in d:\000\paddlestudy\venv\lib\site-packages (from -r requirements.txt (line 10)) (0.12.2) Requirement already satisfied: matplotlib in d:\000\paddlestudy\venv\lib\site-packages (from imgaug==0.4.0->-r requirements.txt (line 3)) (3.3.4) Requirement already satisfied: Pillow in d:\000\paddlestudy\venv\lib\site-packages (from imgaug==0.4.0->-r requirements.txt (line 3)) (8.1.2) Requirement already satisfied: imageio in d:\000\paddlestudy\venv\lib\site-packages (from imgaug==0.4.0->-r requirements.txt (line 3)) (2.9.0) Requirement already satisfied: scipy in d:\000\paddlestudy\venv\lib\site-packages (from imgaug==0.4.0->-r requirements.txt (line 3)) (1.6.1) Requirement already satisfied: six in d:\000\paddlestudy\venv\lib\site-packages (from imgaug==0.4.0->-r requirements.txt (line 3)) (1.15.0) Requirement already satisfied: tifffile>=2019.7.26 in d:\000\paddlestudy\venv\lib\site-packages (from scikit-image==0.17.2->-r requirements.txt (line 2)) (2021.3.5) Requirement already satisfied: networkx>=2.0 in d:\000\paddlestudy\venv\lib\site-packages (from scikit-image==0.17.2->-r requirements.txt (line 2)) (2.5) Requirement already satisfied: PyWavelets>=1.1.1 in d:\000\paddlestudy\venv\lib\site-packages (from scikit-image==0.17.2->-r requirements.txt (line 2)) (1.1.1) Requirement already satisfied: pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.3 in d:\000\paddlestudy\venv\lib\site-packages (from matplotlib->imgaug==0.4.0->-r requirements.txt (line 3)) (2.4.7) Requirement already satisfied: kiwisolver>=1.0.1 in d:\000\paddlestudy\venv\lib\site-packages (from matplotlib->imgaug==0.4.0->-r requirements.txt (line 3)) (1.3.1) Requirement already satisfied: python-dateutil>=2.1 in d:\000\paddlestudy\venv\lib\site-packages (from matplotlib->imgaug==0.4.0->-r requirements.txt (line 3)) (2.8.1) Requirement already satisfied: cycler>=0.10 in d:\000\paddlestudy\venv\lib\site-packages (from matplotlib->imgaug==0.4.0->-r requirements.txt (line 3)) (0.10.0) Requirement already satisfied: decorator>=4.3.0 in d:\000\paddlestudy\venv\lib\site-packages (from networkx>=2.0->scikit-image==0.17.2->-r requirements.txt (line 2)) (4.4.2) Requirement already satisfied: setuptools in d:\000\paddlestudy\venv\lib\site-packages (from python-Levenshtein->-r requirements.txt (line 10)) (54.1.0) Requirement already satisfied: pre-commit in d:\000\paddlestudy\venv\lib\site-packages (from visualdl->-r requirements.txt (line 9)) (2.10.1) Requirement already satisfied: flake8>=3.7.9 in d:\000\paddlestudy\venv\lib\site-packages (from visualdl->-r requirements.txt (line 9)) (3.8.4) Requirement already satisfied: requests in d:\000\paddlestudy\venv\lib\site-packages (from visualdl->-r requirements.txt (line 9)) (2.25.1) Requirement already satisfied: Flask-Babel>=1.0.0 in d:\000\paddlestudy\venv\lib\site-packages (from visualdl->-r requirements.txt (line 9)) (2.0.0) Requirement already satisfied: bce-python-sdk in d:\000\paddlestudy\venv\lib\site-packages (from visualdl->-r requirements.txt (line 9)) (0.8.53) Requirement already satisfied: protobuf>=3.11.0 in d:\000\paddlestudy\venv\lib\site-packages (from visualdl->-r requirements.txt (line 9)) (3.15.5) Requirement already satisfied: shellcheck-py in d:\000\paddlestudy\venv\lib\site-packages (from visualdl->-r requirements.txt (line 9)) (0.7.1.1) Requirement already satisfied: flask>=1.1.1 in d:\000\paddlestudy\venv\lib\site-packages (from visualdl->-r requirements.txt (line 9)) (1.1.2) Requirement already satisfied: pyflakes<2.3.0,>=2.2.0 in d:\000\paddlestudy\venv\lib\site-packages (from flake8>=3.7.9->visualdl->-r requirements.txt (line 9)) (2.2.0) Requirement already satisfied: mccabe<0.7.0,>=0.6.0 in d:\000\paddlestudy\venv\lib\site-packages (from flake8>=3.7.9->visualdl->-r requirements.txt (line 9)) (0.6.1) Requirement already satisfied: pycodestyle<2.7.0,>=2.6.0a1 in d:\000\paddlestudy\venv\lib\site-packages (from flake8>=3.7.9->visualdl->-r requirements.txt (line 9)) (2.6.0) Requirement already satisfied: Jinja2>=2.10.1 in d:\000\paddlestudy\venv\lib\site-packages (from flask>=1.1.1->visualdl->-r requirements.txt (line 9)) (2.11.3) Requirement already satisfied: click>=5.1 in d:\000\paddlestudy\venv\lib\site-packages (from flask>=1.1.1->visualdl->-r requirements.txt (line 9)) (7.1.2) Requirement already satisfied: itsdangerous>=0.24 in d:\000\paddlestudy\venv\lib\site-packages (from flask>=1.1.1->visualdl->-r requirements.txt (line 9)) (1.1.0) Requirement already satisfied: Werkzeug>=0.15 in d:\000\paddlestudy\venv\lib\site-packages (from flask>=1.1.1->visualdl->-r requirements.txt (line 9)) (1.0.1) Requirement already satisfied: pytz in d:\000\paddlestudy\venv\lib\site-packages (from Flask-Babel>=1.0.0->visualdl->-r requirements.txt (line 9)) (2021.1) Requirement already satisfied: Babel>=2.3 in d:\000\paddlestudy\venv\lib\site-packages (from Flask-Babel>=1.0.0->visualdl->-r requirements.txt (line 9)) (2.9.0) Requirement already satisfied: MarkupSafe>=0.23 in d:\000\paddlestudy\venv\lib\site-packages (from Jinja2>=2.10.1->flask>=1.1.1->visualdl->-r requirements.txt (line 9)) (1.1.1) Requirement already satisfied: pycryptodome>=3.8.0 in d:\000\paddlestudy\venv\lib\site-packages (from bce-python-sdk->visualdl->-r requirements.txt (line 9)) (3.10.1) Requirement already satisfied: future>=0.6.0 in d:\000\paddlestudy\venv\lib\site-packages (from bce-python-sdk->visualdl->-r requirements.txt (line 9)) (0.18.2) Requirement already satisfied: toml in d:\000\paddlestudy\venv\lib\site-packages (from pre-commit->visualdl->-r requirements.txt (line 9)) (0.10.2) Requirement already satisfied: virtualenv>=20.0.8 in d:\000\paddlestudy\venv\lib\site-packages (from pre-commit->visualdl->-r requirements.txt (line 9)) (20.4.2) Requirement already satisfied: identify>=1.0.0 in d:\000\paddlestudy\venv\lib\site-packages (from pre-commit->visualdl->-r requirements.txt (line 9)) (2.1.0) Requirement already satisfied: cfgv>=2.0.0 in d:\000\paddlestudy\venv\lib\site-packages (from pre-commit->visualdl->-r requirements.txt (line 9)) (3.2.0) Requirement already satisfied: pyyaml>=5.1 in d:\000\paddlestudy\venv\lib\site-packages (from pre-commit->visualdl->-r requirements.txt (line 9)) (5.4.1) Requirement already satisfied: nodeenv>=0.11.1 in d:\000\paddlestudy\venv\lib\site-packages (from pre-commit->visualdl->-r requirements.txt (line 9)) (1.5.0) Requirement already satisfied: distlib<1,>=0.3.1 in d:\000\paddlestudy\venv\lib\site-packages (from virtualenv>=20.0.8->pre-commit->visualdl->-r requirements.txt (line 9)) (0.3.1) Requirement already satisfied: appdirs<2,>=1.4.3 in d:\000\paddlestudy\venv\lib\site-packages (from virtualenv>=20.0.8->pre-commit->visualdl->-r requirements.txt (line 9)) (1.4.4) Requirement already satisfied: filelock<4,>=3.0.0 in d:\000\paddlestudy\venv\lib\site-packages (from virtualenv>=20.0.8->pre-commit->visualdl->-r requirements.txt (line 9)) (3.0.12) Requirement already satisfied: certifi>=2017.4.17 in d:\000\paddlestudy\venv\lib\site-packages (from requests->visualdl->-r requirements.txt (line 9)) (2020.12.5) Requirement already satisfied: idna<3,>=2.5 in d:\000\paddlestudy\venv\lib\site-packages (from requests->visualdl->-r requirements.txt (line 9)) (2.10) Requirement already satisfied: urllib3<1.27,>=1.21.1 in d:\000\paddlestudy\venv\lib\site-packages (from requests->visualdl->-r requirements.txt (line 9)) (1.26.3) Requirement already satisfied: chardet<5,>=3.0.2 in d:\000\paddlestudy\venv\lib\site-packages (from requests->visualdl->-r requirements.txt (line 9)) (4.0.0)

7. 創建目錄

下列目錄需要手工創建
ch_lite
det_db
inference
inference_results
models

8. 下載文本檢測、文本識別、文本方向分類模型的參數文件

【文本檢測模型】 下載地址：
https://paddleocr.bj.bcebos.com/20-09-22/mobile/det/ch_ppocr_mobile_v1.1_det_train.tar
解壓到ch_lite目錄下

【文本識別模型】下載地址：
https://paddleocr.bj.bcebos.com/20-09-22/mobile/rec/ch_ppocr_mobile_v1.1_rec_train.tar
解壓到ch_lite目錄下

【文本方向分類模型】下載地址：
https://paddleocr.bj.bcebos.com/20-09-22/cls/ch_ppocr_mobile_v1.1_cls_train.tar
解壓到ch_lite目錄下

直接下載解壓后，可能出現壓縮包內的某些“文件夾”會顯示成“文件”。
我試驗了在Linux下用wget下載tar包，然后用tar -xf解壓，可以解決此問題。感覺大概率應該是出在解壓上，在windows上也可以嘗試用別的解壓軟件試試看。

wget -P ./ch_lite/ https://paddleocr.bj.bcebos.com/20-09-22/mobile/det/ch_ppocr_mobile_v1.1_det_train.tar && tar xf ./ch_lite/ch_ppocr_mobile_v1.1_det_train.tar -C ./ch_lite/ wget -P ./ch_lite/ https://paddleocr.bj.bcebos.com/20-09-22/mobile/rec/ch_ppocr_mobile_v1.1_rec_train.tar && tar xf ./ch_lite/ch_ppocr_mobile_v1.1_rec_train.tar -C ./ch_lite/ wget -P ./ch_lite/ https://paddleocr.bj.bcebos.com/20-09-22/cls/ch_ppocr_mobile_v1.1_cls_train.tar && tar xf ./ch_lite/ch_ppocr_mobile_v1.1_cls_train.tar -C ./ch_lite/ [user@localhost tmp]$ wget -P ./ch_lite/ https://paddleocr.bj.bcebos.com/20-09-22/mobile/det/ch_ppocr_mobile_v1.1_det_train.tar && tar xf ./ch_lite/ch_ppocr_mobile_v1.1_det_train.tar -C ./ch_lite/ --2021-03-11 16:05:36-- https://paddleocr.bj.bcebos.com/20-09-22/mobile/det/ch_ppocr_mobile_v1.1_det_train.tar 正在解析主機 paddleocr.bj.bcebos.com (paddleocr.bj.bcebos.com)... 2409:8c00:6c21:10ad:0:ff:b00e:67d, 112.34.111.44, 39.156.69.23 正在連接 paddleocr.bj.bcebos.com (paddleocr.bj.bcebos.com)|2409:8c00:6c21:10ad:0:ff:b00e:67d|:443... 已連接。 已發出 HTTP 請求，正在等待回應... 200 OK 長度：12400640 (12M) [application/x-tar] 正在保存至: “./ch_lite/ch_ppocr_mobile_v1.1_det_train.tar”100%[====================================================================================================================================================================================================================================>] 12,400,640 3.17MB/s 用時 6.0s 2021-03-11 16:05:43 (1.98 MB/s) - 已保存 “./ch_lite/ch_ppocr_mobile_v1.1_det_train.tar” [12400640/12400640])[user@localhost tmp]$ wget -P ./ch_lite/ https://paddleocr.bj.bcebos.com/20-09-22/mobile/rec/ch_ppocr_mobile_v1.1_rec_train.tar && tar xf ./ch_lite/ch_ppocr_mobile_v1.1_rec_train.tar -C ./ch_lite/ --2021-03-11 16:05:53-- https://paddleocr.bj.bcebos.com/20-09-22/mobile/rec/ch_ppocr_mobile_v1.1_rec_train.tar 正在解析主機 paddleocr.bj.bcebos.com (paddleocr.bj.bcebos.com)... 2409:8c00:6c21:10ad:0:ff:b00e:67d, 39.156.69.23, 112.34.111.44 正在連接 paddleocr.bj.bcebos.com (paddleocr.bj.bcebos.com)|2409:8c00:6c21:10ad:0:ff:b00e:67d|:443... 已連接。 已發出 HTTP 請求，正在等待回應... 200 OK 長度：13675015 (13M) [application/x-tar] 正在保存至: “./ch_lite/ch_ppocr_mobile_v1.1_rec_train.tar”100%[====================================================================================================================================================================================================================================>] 13,675,015 2.45MB/s 用時 7.6s 2021-03-11 16:06:01 (1.71 MB/s) - 已保存 “./ch_lite/ch_ppocr_mobile_v1.1_rec_train.tar” [13675015/13675015])[user@localhost tmp]$ wget -P ./ch_lite/ https://paddleocr.bj.bcebos.com/20-09-22/cls/ch_ppocr_mobile_v1.1_cls_train.tar && tar xf ./ch_lite/ch_ppocr_mobile_v1.1_cls_train.tar -C ./ch_lite/ --2021-03-11 16:06:10-- https://paddleocr.bj.bcebos.com/20-09-22/cls/ch_ppocr_mobile_v1.1_cls_train.tar 正在解析主機 paddleocr.bj.bcebos.com (paddleocr.bj.bcebos.com)... 2409:8c00:6c21:10ad:0:ff:b00e:67d, 112.34.111.44, 39.156.69.23 正在連接 paddleocr.bj.bcebos.com (paddleocr.bj.bcebos.com)|2409:8c00:6c21:10ad:0:ff:b00e:67d|:443... 已連接。 已發出 HTTP 請求，正在等待回應... 200 OK 長度：3957248 (3.8M) [application/x-tar] 正在保存至: “./ch_lite/ch_ppocr_mobile_v1.1_cls_train.tar”100%[====================================================================================================================================================================================================================================>] 3,957,248 1.05MB/s 用時 4.0s 2021-03-11 16:06:14 (976 KB/s) - 已保存 “./ch_lite/ch_ppocr_mobile_v1.1_cls_train.tar” [3957248/3957248])[user@localhost tmp]$ ll 總用量 4 drwxrwxr-x. 5 user group 4096 3月 11 16:06 ch_lite [user@localhost tmp]$ cd ch_lite/ [user@localhost ch_lite]$ ll 總用量 29336 drwxr-xr-x. 2 user group 184 9月 15 16:11 ch_ppocr_mobile_v1.1_cls_train -rw-rw-r--. 1 user group 3957248 9月 17 14:43 ch_ppocr_mobile_v1.1_cls_train.tar drwxr-xr-x. 2 user group 92 9月 16 14:56 ch_ppocr_mobile_v1.1_det_train -rw-rw-r--. 1 user group 12400640 9月 16 15:18 ch_ppocr_mobile_v1.1_det_train.tar drwxrwxr-x. 2 user group 92 9月 24 09:15 ch_ppocr_mobile_v1.1_rec_train -rw-rw-r--. 1 user group 13675015 9月 24 10:48 ch_ppocr_mobile_v1.1_rec_train.tar

9. 將模型參數文件轉換成inference模型

(venv) E:\test\PycharmProjects\PaddleStudy\PaddleOCR>python tools/export_model.py -c configs/det/det_mv3_db.yml -o Global.checkpoints=./ch_lite/ch_ppocr_mobile_v1.1_det_train/best_accuracy Global.save_inference_dir=./inference/det_db [2021/03/11 16:21:47] root INFO: resume from ./ch_lite/ch_ppocr_mobile_v1.1_det_train/best_accuracy [2021/03/11 16:21:52] root INFO: inference model is saved to ./inference/det_db//inference(venv) E:\test\PycharmProjects\PaddleStudy\PaddleOCR>python tools/export_model.py -c configs/rec/ch_ppocr_v2.0/rec_chinese_lite_train_v2.0.yml -o Global.checkpoints=./ch_lite/ch_ppocr_mobile_v1.1_rec_train/best_accuracy Global.save_i erence_dir=./inference/rec_crnn/ [2021/03/11 16:22:04] root INFO: resume from ./ch_lite/ch_ppocr_mobile_v1.1_rec_train/best_accuracy [2021/03/11 16:22:08] root INFO: inference model is saved to ./inference/rec_crnn//inference(venv) E:\test\PycharmProjects\PaddleStudy\PaddleOCR>python tools/export_model.py -c configs/cls/cls_mv3.yml -o Global.checkpoints=./ch_lite/ch_ppocr_mobile_v1.1_cls_train/best_accuracy Global.save_inference_dir=./inference/cls/ [2021/03/11 16:22:15] root INFO: resume from ./ch_lite/ch_ppocr_mobile_v1.1_cls_train/best_accuracy [2021/03/11 16:22:19] root INFO: inference model is saved to ./inference/cls//inference(venv) E:\test\PycharmProjects\PaddleStudy\PaddleOCR>

其中：

# -c后面設置訓練算法的yml配置文件
# -o配置可選參數
# Global.checkpoints 參數指向訓練中保存的模型參數文件，不用添加文件后綴.pdmodel，.pdopt或.pdparams。
# Global.save_inference_dir 參數設置轉換的模型將保存的地址。

轉換完成后
在inference/det_db下生成了以下文件（文本檢測模型）：

在inferencerec_crnn下生成了以下文件（文本識別模型）：

在inference/cls下生成了以下文件（文本方向分類模型）：

我留意到，不同環境下生成的.pdmodel模型文件大小會不同（.pdiparams和.info對應文件大小相同），我在另一臺windows10上的文件大小為：

inference/det_db/inference.pdmodel - 1149KB
inference/rec_crnn/inference.pdmodel - 848KB
inference/cls/inference.pdmodel - 835KB

【參考文獻】
飛槳安裝文檔：
https://www.paddlepaddle.org.cn/install/quick
基于Python預測引擎推理：
https://github.com/PaddlePaddle/PaddleOCR/blob/develop/doc/doc_ch/inference.md
PaddleOCR簡單文字識別使用
https://blog.csdn.net/weixin_43134049/article/details/110670762

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