Initial commit

Highly WIP does not yet do shit.

.gitignore

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+testdata
+usercomment.sh

exif_rad.py

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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""Iterates over a bunch of .jpg or .cr2 files and matches 
+DateTimeOriginal from Exif tag to DateTime in a csv log 
+of a GeigerMuellerCounter."""
+
+from datetime import datetime
+from PIL import Image
+import math
+import piexif
+import piexif.helper
+
+# Constants
+# 320  series: 0.0065   µSv/h / CPM
+SIFACTOR = 0.0065 
+
+# Temp constants
+RAD = "0,15"
+
+# Import GeigerCounter data
+with open("testdata/TKRZ.hisdb.his", "r") as f:
+    for line in f:
+        if line[0] != '#':
+            columns = line.split(',')
+            csvrawtime = columns[1].lstrip()
+            csvrawcpm = columns[2].lstrip()
+            csvrawrad = round(float(csvrawcpm) * SIFACTOR, 2)
+            csvisotime = datetime.fromisoformat(csvrawtime)
+            # Print with 2 digits after dot and unit of measurement
+            print(csvisotime, csvrawrad, "µS/h")
+
+# Load Image and EXIF data
+im = Image.open("testdata/test.jpg")
+exif_dict = piexif.load(im.info["exif"])
+
+picrawtime = exif_dict["Exif"][piexif.ExifIFD.DateTimeOriginal].decode('ASCII')
+picisotime = datetime.strptime(picrawtime, "%Y:%m:%d %H:%M:%S")
+
+print(picisotime)
+
+# convert str to exif compatible string
+new_comment = "Radiation ☢ " + RAD + " µS/h"
+user_comment = piexif.helper.UserComment.dump(new_comment, encoding="unicode")
+exif_dict["Exif"][piexif.ExifIFD.UserComment] = user_comment
+
+# compile and write tags
+print("Going to write comment: " + new_comment)
+exif_bytes = piexif.dump(exif_dict)
+#im.save("test.jpg", exif=exif_bytes)