Adding preprocess.bat

preprocess.bat

@@ -0,0 +1,23 @@
+@ECHO OFF
+
+IF %2.==. (
+    ECHO Please provide an output directory and an input PDF. Example: pdf2hocr ./ocrd ~/Downloads/document.pdf
+    EXIT /b
+) 
+
+MKDIR %1
+MKDIR %1\png
+MKDIR %1\tesseract
+MKDIR %1\annotated
+MKDIR %1\tables
+
+gswin64c -dBATCH -dNOPAUSE -sDEVICE=png16m -dGraphicsAlphaBits=4 -dTextAlphaBits=4 -r600 -sOutputFile="%1/png/page_%%d.png" %2
+
+COPY %2 %1\orig.pdf
+pdftotext %1\orig.pdf - -enc UTF-8 > %1\text.txt
+
+for /R "%1\png" %%f in (*.png) do (
+    tesseract %1\png\%%~nf.png %1\tesseract\%%~nf.html hocr
+    move %1\tesseract\%%~nf.html.hocr %1\tesseract\%%~nf.html
+    python annotate.py %1/tesseract/%%~nf.html %1/annotated/%%~nf.png
+)