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Update: The checkfor function was split off into its own

(included) module.

Update: use the platform-neutral os.devnull instead of the /dev/null device that is generally only found on UNIX-like platforms.

The markphotos.zip script adds a copyright notice to pictures. It uses exiftool. This is not a visible notice, but one contained in the file's metadata. The following in an excerpt from the identify --verbose output of a photos that was marked by markphotos.py:

Image: img_0541.jpg
  Format: JPEG (Joint Photographic Experts Group JFIF format)
  Class: DirectClass
  Geometry: 3648x2736+0+0
  Resolution: 180x180
  Print size: 20.2667x15.2
  Units: PixelsPerInch
  Type: TrueColor
  ...
  Properties:
     comment: Copyright © 2011 R.F. Smith <rsmith@xs4all.nl>
     ...
     exif:DateTime: 2011:06:08 21:53:32

To speed up the processing of multiple pictures, this script runs in parallel on all the cores that your machine has. If you want to add a visual watermark to a picture, I suggest using the mogrify program from the ImageMagick suite.

N.B.: Edit the script and change the string cr in the function processfile to something appropriate before using this script!

Note

To the extent possible under law, Roland Smith has waived all copyright and related or neighboring rights to markphotos.py. This work is published from the Netherlands.