adding normalizeJPEG

shell/normalizeJPEG.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+#
+# requires "jhead" (yum/apt-get install jhead)
+# normalize JPG files based on their EXIF header - handy for loads of pics
+# taken with different cameras (several phones, e.g.) that store the EXIF
+# dates in different formats and name the files differently.
+#
+# Result: YYYY-MM-DD_HH-MM-SS_###.jpg (where ### is random 100-999)
+#
+# This script also updates date/timestamp on disk, then reverse updates the
+# EXIF header from that stamp to normalize your headers DATE/TIME field
+#
+# SPDX-License-Identifier: MIT
+
+for file in *.jpg *.jpeg *.JPG *.JPEG; do
+  if [ ! -e "$file" ]; then
+    continue
+  fi
+  echo "Inspecting $file"
+  JPGDT=$(jhead "$file" | grep "Date/Time")
+  JPGFC=$(jhead "$file" | grep "Date/Time" -c)
+  # shellcheck disable=SC2086
+  if [ $JPGFC -gt 1 ]; then
+    echo "Found too many results for: $file"
+    continue
+  elif [ $JPGFC -eq 0 ]; then
+    echo "No valid headers found."
+    continue
+  else
+      BASE=$(echo $JPGDT | awk '{ printf("%s %s",$3,$4) }' | sed -e 's/\([0-9][0-9]\).\([0-9][0-9]\).\([0-9][0-9]\) \([0-9][0-9]\).\([0-9][0-9]\).\([0-9][0-9]\)/\1-\2-\3 \4:\5:\6/')
+      BASE=$(date -d "$BASE" +"%Y-%m-%d_%H-%M-%S")
+      # shellcheck disable=SC2007
+      RND=$[($RANDOM%899)+100]
+      if [ ! -e "${BASE}_${RND}.jpg" ]; then
+        echo "New file: ${BASE}_${RND}.jpg"
+        mv "$file" "${BASE}_${RND}.jpg"
+        jhead -ft "${BASE}_${RND}.jpg"
+        jhead -dsft "${BASE}_${RND}.jpg"
+      fi
+  fi
+done