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OCRmyPDF.sh: minor improvements

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- additionnal data logged
- width/height were inverted: corrected
- few other minor changes
This commit is contained in:
fritz-hh 2013-04-26 14:20:45 +02:00
parent 3249fba4a2
commit 1c0eb03b3b
1 changed files with 13 additions and 11 deletions
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24
OCRmyPDF.sh
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@ -114,9 +114,9 @@ if [ "$#" -ne "2" ]; then
exit $EXIT_BAD_ARGS
fi
! absolutePath "$1" && echo "The folder in which the input file should be located does not exist. Exiting..." >&2 && exit $EXIT_BAD_ARGS
! absolutePath "$1" > /dev/null && echo "The folder in which the input file should be located does not exist. Exiting..." >&2 && exit $EXIT_BAD_ARGS
FILE_INPUT_PDF="`absolutePath "$1"`"
! absolutePath "$2" && echo "The folder in which the output file should be generated does not exist. Exiting..." >&2 && exit $EXIT_BAD_ARGS
! absolutePath "$2" > /dev/null && echo "The folder in which the output file should be generated does not exist. Exiting..." >&2 && exit $EXIT_BAD_ARGS
FILE_OUTPUT_PDFA="`absolutePath "$2"`"
@ -179,10 +179,10 @@ while read pageSize ; do
curOCRedPDF="$TMP_FLD/${page}-ocred.pdf" # PDF file containing the image + the OCRed text for the current page
curOCRedPDFDebug="$TMP_FLD/${page}-debug-ocred.pdf" # PDF file containing data required to find out if OCR worked correctly
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Computing embedded image resolution"
# get width / height of PDF page
heightPDF=`echo $pageSize | cut -f1 -d" "`
widthPDF=`echo $pageSize | cut -f2 -d" "`
# get width / height of PDF page (in pt)
widthPDF=`echo $pageSize | cut -f1 -d" "`
heightPDF=`echo $pageSize | cut -f2 -d" "`
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: size ${heightPDF}x${widthPDF} (h*w in pt)"
# extract raw image from pdf file to compute resolution
# unfortunatelly this image can have another orientation than in the pdf...
# so we will have to extract it again later
@ -190,24 +190,26 @@ while read pageSize ; do
# count number of extracted images
nbImg=`ls -1 "$curOrigImg"* | wc -l`
[ $nbImg -ne "1" ] && echo "Expecting exactly 1 image on page $page (found $nbImg). Exiting..." >&2 && exit $EXIT_BAD_INPUT_FILE
# Get characteristics of the extracted image
curImg=`ls -1 "$curOrigImg"*`
propCurImg=`identify -format "%w %h %[colorspace]" "$curImg"`
heightCurImg=`echo "$propCurImg" | cut -f1 -d" "`
widthCurImg=`echo "$propCurImg" | cut -f2 -d" "`
widthCurImg=`echo "$propCurImg" | cut -f1 -d" "`
heightCurImg=`echo "$propCurImg" | cut -f2 -d" "`
colorspaceCurImg=`echo "$propCurImg" | cut -f3 -d" "`
# switch height/width values if the image has not the right orientation
# we make here the assumption that vertical/horizontal dpi are equal
# we will check that later
if [ $((($heightPDF-$widthPDF)*($heightCurImg-$widthCurImg))) -lt 0 ]; then
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Extracted image has wrong orientation. Inverting image height/width values"
tmpval=$heightCurImg
heightCurImg=$widthCurImg
widthCurImg=$tmpval
fi
# compute the resolution of the image in the page
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: size ${heightCurImg}x${widthCurImg} (h*w pixel)"
# compute the resolution of the image
dpi_x=$(($widthCurImg*72/$widthPDF))
dpi_y=$(($heightCurImg*72/$heightPDF))
[ "$dpi_x" -ne "$dpi_y" ] && echo "X/Y Resolutions not equal ($dpi_x/$dpi_y). Exiting..." >&2 && exit $EXIT_BAD_INPUT_FILE
[ "$dpi_x" -ne "$dpi_y" ] && echo "X/Y resolutions not equal ($dpi_x/$dpi_y). Exiting..." >&2 && exit $EXIT_BAD_INPUT_FILE
dpi="$dpi_x"
# Identify if page image should be saved as ppm (color) or pgm (gray)