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--- en:user_advanced:greenstone_extensions [2025/07/25 02:47] – kjdon
+++ en:user_advanced:greenstone_extensions [2025/07/25 02:55] (current) – [Tesseract] kjdon
@@ Line 20: / Line 20: @@
 ===== Tesseract =====
+Tesseract is an Open Source OCR Engine.
+The tesseract extension contains the tesseract program, plus Greenstone plugins to use it during build.
+You can get the Tesseract extension in two ways:
+  - Download the tar or zip file from [[https://trac.greenstone.org/browser/gs2-extensions/tesseract/trunk]], and place it in //ext// (for Greenstone 2) or //gs2build/ext// (for Greenstone 3). Extract all files.
+  - Checkout the source and compile it:
+<code>
+  cd greenstone3/gs2build/ext
+  svn co https://svn.greenstone.org/gs2-extensions/tesseract/trunk/src tesseract
+  cd tesseract
+  ./CASCADE-MAKE.sh
+</code>
+Once installed (by either method), you will need to open a new terminal and source gs3-setup.sh to have the extensions environment variables set.
+==== TesseractPlugins====
+The tesseract extension comes with two plugins: TesseractTextExtractor and TesseractImagePlugin.
+TesseractTextExtractor is a helper plugin that will run Tesseract on an image, producing a text file.
+TesseractImagePlugin can replace ImagePlugin, adding Tesseract OCR ability to it.