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OCRmyPDF.sh: check if utilities are installed

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fritz-hh
2013-04-19 22:23:28 +02:00
parent 35d8cffad4
commit 4f65a31eba
1 changed files with 38 additions and 19 deletions
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OCRmyPDF.sh
+38 -19
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@@ -2,16 +2,20 @@
VERSION="alpha0"
# Initialization of configuration parameters
FILE_INPUT_PDF="$1"
LAN="eng" # language of the PDF file (required to get good OCR results)
KEEP_TMP="0" # do not delete the temporary files
IMG4OCR="0" # 0=original image
# 1=only deskewed
# 2=processed with unpaper
IMG4PDF="0" # 0=original image
# 1=only deskewed
# 2=processed with unpaper
LOG_ERR="0" # 0=only error messages
LOG_INFO="1" # 1=error messages and some infos
LOG_DEBUG="2" # 2=debug level logging
VERBOSITY="$LOG_ERR"
LAN="eng" # language of the PDF file (required to get good OCR results)
KEEP_TMP="0" # do not delete the temporary files
IMG_PREPROCESS="0" # 0=none
# 1=only deskew
# 2=full preprocessing for OCR, but only deskew in final PDF
# 3=full preprocessing
# Initialize path to temporary files
tmp="./tmp"
FILE_SIZE_PAGES="$tmp/page-sizes.txt" # size in pt of the respective page of the input PDF file
FILES_OCRed_PDFS="${tmp}/*-ocred.pdf" # string matching all 1 page PDF files that need to be merged
@@ -19,10 +23,22 @@ FILE_OUTPUT_PDF="${tmp}/ocred.pdf" # name of the OCRed PDF file before conversi
FILE_OUTPUT_PDFA="${tmp}/ocred-pdfa.pdf" # name of the final PDF/A file
FILE_VALIDATION_LOG="${tmp}/pdf_validation.log" # log file containing the results of the validation of the PDF/A file
# check if the required utilities are installed
! which gs > /dev/null && echo "Please install ghostcript. Exiting..." && exit 1
! which identify > /dev/null && echo "Please install ImageMagick. Exiting..." && exit 1
! which pdfimages > /dev/null && echo "Please install xpdf. Exiting..." && exit 1
! which pdftoppm > /dev/null && echo "Please install xpdf. Exiting..." && exit 1
! which pdftk > /dev/null && echo "Please install pdftk. Exiting..." && exit 1
! which unpaper > /dev/null && echo "Please install unpaper. Exiting..." && exit 1
! which tesseract > /dev/null && echo "Please install tesseract and tesseract-data. Exiting..." && exit 1
# delete tmp files
rm -r -f "${tmp}"
mkdir -p "${tmp}"
# get the size of each pdf page (width / height) in pt (inch*72)
echo "Input file: Extracting size of each page (in pt)"
identify -format "%w %h\n" "$FILE_INPUT_PDF" > "$FILE_SIZE_PAGES"
@@ -53,10 +69,8 @@ while read pageSize ; do
pdfimages -f $page -l $page -j "$FILE_INPUT_PDF" "$curOrigImg" 1>&2
# count number of extracted images
nbImg=`ls -1 "$curOrigImg"* | wc -l`
if [ $nbImg -ne "1" ]; then
echo "Not exactly 1 image on page $page. Exiting"
exit 1
fi
[ $nbImg -ne "1" ] && echo "Not exactly 1 image on page $page. Exiting..." && exit 1
# Get the characteristic of the extracted image
curOrigImg01=`ls -1 "$curOrigImg"*`
propCurOrigImg01=`identify -format "%w %h %[colorspace]" "$curOrigImg01"`
@@ -68,12 +82,11 @@ while read pageSize ; do
# Identify if page image should be saved as ppm (color) or pgm (gray)
echo "Page $page: Extracting image as ppm/pgm (${dpi} dpi)"
ext="ppm"
opt=""
if [ $colorspaceCurOrigImg01 == "Gray" ]; then
ext="pgm"
opt="-gray"
else
ext="ppm"
opt=""
fi
curImgPixmap="$tmp/$page.$ext"
curImgPixmapClean="$tmp/$page.for-ocr.$ext"
@@ -109,6 +122,8 @@ while read pageSize ; do
cpt=$(($cpt+1))
done < "$FILE_SIZE_PAGES"
# concatenate all pages
echo "Output file: Concatenating all pages"
pdftk $FILES_OCRed_PDFS cat output "$FILE_OUTPUT_PDF"
@@ -126,17 +141,21 @@ gs -dQUIET -dPDFA -dBATCH -dNOPAUSE -dUseCIEColor \
# validate generated pdf file (compliance to PDF/A)
echo "Output file: Checking compliance to PDF/A standard"
java -jar /root/jhove-1_9/jhove/bin/JhoveApp.jar -m PDF-hul "$FILE_OUTPUT_PDFA" > "$FILE_VALIDATION_LOG"
cat "$FILE_VALIDATION_LOG" | egrep "Status|Message" # summary of the validation
grep -i "Status|Message" "$FILE_VALIDATION_LOG" # summary of the validation
# check if the validation was successful
pdf_valid=1
cat "$FILE_VALIDATION_LOG" | egrep "ErrorMessage" && pdf_valid=0
cat "$FILE_VALIDATION_LOG" | egrep "Status.*not valid" && pdf_valid=0
cat "$FILE_VALIDATION_LOG" | egrep "Status.*Not well-formed" && pdf_valid=0
grep -i "ErrorMessage" "$FILE_VALIDATION_LOG" && pdf_valid=0
grep -i "Status.*not valid" "$FILE_VALIDATION_LOG" && pdf_valid=0
grep -i "Status.*Not well-formed" "$FILE_VALIDATION_LOG" && pdf_valid=0
[ $pdf_valid -eq 1 ] && echo "Output file: The generated PDF/A file is VALID" \
|| echo "Output file: The generated PDF/A file is INVALID"
# delete temporary files
if [ $KEEP_TMP -eq 0 ]; then
rm $FILES_OCRed_PDFS
rm "$FILE_SIZE_PAGES"
rm "$FILE_OUTPUT_PDF"
fi