Closes #19 (Add OCR quality statistics): The reported accuracy is shown on the image page

image_template.html

@@ -26,7 +26,8 @@ ${ALTERNATIVES}
 <p class="greystats">
 ${GREY_FIRST}: ${GREY_PERCENT_FIRST}%<br/>
 ${GREY_LAST}: ${GREY_PERCENT_LAST}%<br/>
-Unique greyscale values: ${GREY_UNIQUE}
+Unique greyscale values: ${GREY_UNIQUE}<br/>
+ALTO-accuracy: ${ACCURACY}%
 <p><input type="checkbox" id="toggle_grid" onClick="toggleGrid();">Grid</input></p>
 <p><input type="checkbox" id="toggle_textblock" checked="checked" onClick="toggleTextBlock();">TextBlocks</input></p>
 <p><input type="checkbox" id="toggle_blown" onClick="toggleBlown();">Black/white</input></p>

quack.sh

@@ -467,7 +467,7 @@ function blackWhite() {
 
 # Generates overlayscase 
 # src dest altofile width height
-# Output: ELEMENTS_HTML OVERLAYS OCR_CONTENT IDNEXT_CONTENT FULL_RELATIVE_HEIGHT
+# Output: ELEMENTS_HTML OVERLAYS OCR_CONTENT IDNEXT_CONTENT FULL_RELATIVE_HEIGHT ACCURACY
 function processALTO() {
     local SRC="$1"
     local DEST="$2"
@@ -499,6 +499,7 @@ function processALTO() {
     local PTAG=`echo "$ALTO_COMPACT" | grep -o "<Page[^>]\\+>"`
     local PHEIGHT=`echo $PTAG | sed 's/.*HEIGHT=\"\([^"]\+\)".*/\\1/g'`
     local PWIDTH=`echo $PTAG | sed 's/.*WIDTH=\"\([^"]\+\)".*/\\1/g'`
+    ACCURACY=`echo $PTAG | sed 's/.*ACCURACY=\"\([^"]\+\)".*/\\1/g'`
 
     FULL_RELATIVE_HEIGHT=`echo "scale=6;$PHEIGHT/$PWIDTH" | bc | sed 's/^\./0./'`
     # TODO: Ponder how relative positioning works and why this hack is necessary