OCR: Difference between revisions

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: [[Image:Owl icon.jpg]] 講個秘訣：因為線上服務免費版會限制 PDF 檔案頁數，可使用切割軟體 [[PDF split and merge tools]]
: [[Image:Owl icon.jpg]] 講個秘訣：因為線上服務免費版會限制 PDF 檔案頁數，可使用切割軟體 [[PDF split and merge tools]]


== OCR scripts or OCR API ==
== OCR scripts ==
Scripts
Scripts
* PHP: [https://github.com/thiagoalessio/tesseract-ocr-for-php thiagoalessio/tesseract-ocr-for-php: A wrapper to work with Tesseract OCR inside PHP.] 有提供繁體中文 model 檔案({{kbd | key=chi_tra (Chinese traditional)}}) <ref>[https://github.com/tesseract-ocr/tesseract/blob/main/doc/tesseract.1.asc#languages-and-scripts LANGUAGES AND SCRIPTS]</ref>，但是繁體中文辨識結果不佳。{{access | date=2022-04-20}}
* PHP: [https://github.com/thiagoalessio/tesseract-ocr-for-php thiagoalessio/tesseract-ocr-for-php: A wrapper to work with Tesseract OCR inside PHP.] 有提供繁體中文 model 檔案({{kbd | key=chi_tra (Chinese traditional)}}) <ref>[https://github.com/tesseract-ocr/tesseract/blob/main/doc/tesseract.1.asc#languages-and-scripts LANGUAGES AND SCRIPTS]</ref>，但是繁體中文辨識結果不佳。{{access | date=2022-04-20}}
* Python: [https://github.com/ocropus/ocropy ocropus/ocropy: Python-based tools for document analysis and OCR] 沒有提供中文 model 檔案 {{access | date=2022-04-20}}
* Python: [https://github.com/ocropus/ocropy ocropus/ocropy: Python-based tools for document analysis and OCR] 沒有提供中文 model 檔案 {{access | date=2022-04-20}}


== OCR API ==
OCR API
OCR API
* [https://azure.microsoft.com/zh-tw/services/cognitive-services/computer-vision/ 電腦視覺 | Microsoft Azure]: [https://docs.microsoft.com/zh-tw/azure/cognitive-services/Computer-vision/quickstarts-sdk/client-library?pivots=programming-language-rest-api&tabs=visual-studio 快速入門：光學字元辨識 (OCR) 用戶端程式庫或 REST API - Azure Cognitive Services | Microsoft Docs] 支援中文<ref>[https://docs.microsoft.com/zh-tw/azure/cognitive-services/computer-vision/language-support#optical-character-recognition-ocr 語言支援 - 電腦視覺 - Azure Cognitive Services | Microsoft Docs]</ref>
* [https://azure.microsoft.com/zh-tw/services/cognitive-services/computer-vision/ 電腦視覺 | Microsoft Azure]: [https://docs.microsoft.com/zh-tw/azure/cognitive-services/Computer-vision/quickstarts-sdk/client-library?pivots=programming-language-rest-api&tabs=visual-studio 快速入門：光學字元辨識 (OCR) 用戶端程式庫或 REST API - Azure Cognitive Services | Microsoft Docs] 支援中文<ref>[https://docs.microsoft.com/zh-tw/azure/cognitive-services/computer-vision/language-support#optical-character-recognition-ocr 語言支援 - 電腦視覺 - Azure Cognitive Services | Microsoft Docs]</ref>

Revision as of 14:46, 20 April 2022

OCR (optical character recognition), 光學字元辨識


OCR tools

  • MS Office 2003 需額外安裝的Office 工具: Microsoft Office Document Imaging (你也可以輕鬆做文字辨識(OCR))
    1. (.pdf檔案轉為.mdi) PDF列印到 MS Office 2003 Document Imaging
    2. (.mdi檔案轉為word檔) MS Office 2003 Document Imaging(.mdi) -> 使用OCR辨識/傳送文字到Word
Owl icon.jpg 講個秘訣：因為線上服務免費版會限制 PDF 檔案頁數，可使用切割軟體 PDF split and merge tools

OCR scripts

Scripts

OCR API

OCR API


相關頁面

常用文件的解析度設定

常用用途的解析度設定

  • 文字辨識 75~150 dpi
  • 圖文交雜 100~150 dpi
  • 圖檔(螢幕上觀看) 150~250 dpi Icon_exclaim.gif 個人經驗: 簡報掃描的圖檔，如果是小字 300 dpi 可以辨識，但建議調整到 600 dpi。
  • 圖檔(有列印需求) 300 dpi以上
  • 名片 150~200 dpi

出處：PCHome 2005/8

References

  1. ↑ Uploading and exporting: Uploading image files with text to Google Docs、將 PDF 和相片檔案轉換為文字 - 電腦 - Google 雲端硬碟說明
  2. ↑ Free Online OCR - OCR API
  3. ↑ LANGUAGES AND SCRIPTS
  4. ↑ 語言支援 - 電腦視覺 - Azure Cognitive Services | Microsoft Docs
  5. ↑ OCR Language Support  |  Cloud Vision API  |  Google Cloud
  6. ↑ Amazon Rekognition text detection supports 7 new languages and improves accuracy " Amazon Rekognition is designed to detect words in English, Arabic, Russian, German, French, Italian, Portuguese and Spanish."
  7. ↑ Detecting text - Amazon Rekognition

相關文章

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