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OCRmyPDF.sh: corrected dpi computation

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fixes #12
This commit is contained in:
fritz-hh
2013-04-24 21:12:35 +02:00
parent c293ffd621
commit e21b3155e5
1 changed files with 6 additions and 8 deletions
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OCRmyPDF.sh
+6 -8
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@@ -193,14 +193,12 @@ while read pageSize ; do
curOrigImg01=`ls -1 "$curOrigImg"*`
propCurOrigImg01=`identify -format "%w %h %[colorspace]" "$curOrigImg01"`
heightCurOrigImg01=`echo "$propCurOrigImg01" | cut -f1 -d" "`
widthICurOrigImg01=`echo "$propCurOrigImg01" | cut -f2 -d" "`
widthCurOrigImg01=`echo "$propCurOrigImg01" | cut -f2 -d" "`
colorspaceCurOrigImg01=`echo "$propCurOrigImg01" | cut -f3 -d" "`
# compute the resolution of the whole page (taking into account all images)
dpi_x=$(($widthICurOrigImg01*72/$widthPDF))
dpi_y=$(($heightCurOrigImg01*72/$heightPDF))
[ "$dpi_x" -ne "$dpi_y" ] && echo "X/Y Resolutions not equal (Not supported currently). Exiting..." && exit $EXIT_BAD_INPUT_FILE
dpi="$dpi_x"
# compute the resolution of the image in the page
dpi=`echo "sqrt(($widthCurOrigImg01*72/$widthPDF)*($heightCurOrigImg01*72/$heightPDF))" | bc -l`
dpi=`echo "scale=0;($dpi+0.5)/1" | bc` # round the dpi value to the nearest integer
# Identify if page image should be saved as ppm (color) or pgm (gray)
ext="ppm"
opt=""
@@ -220,7 +218,7 @@ while read pageSize ; do
# if requested deskew image (without changing its size in pixel)
if [ "$PREPROCESS_DESKEW" -eq "1" ]; then
[ $VERBOSITY -ge $LOG_DEBUG ] && echo "Page $page: Deskewing image"
! convert "$curImgPixmap" -deskew 40% -gravity center -extent ${heightCurOrigImg01}x${widthICurOrigImg01} "$curImgPixmapDeskewed" \
! convert "$curImgPixmap" -deskew 40% -gravity center -extent ${heightCurOrigImg01}x${widthCurOrigImg01} "$curImgPixmapDeskewed" \
&& echo "Could not deskew \"$curImgPixmap\". Exiting..." && exit $EXIT_OTHER_ERROR
else
cp "$curImgPixmap" "$curImgPixmapDeskewed"