After I made my first few timelapse videos I got really bothered by the erratic small changes of exposure, which are caused by various effects: * Changes of the exposure settings (if not in full manual mode) * Uncertainties of the aperture * Shutter jitter
I was looking for an existing solution and only found expensive (O(100€)) software.
So I wrote this little (150 SLOCS) programm. The brightness of the images are adjusted to fit a rolling mean over several consecutive images.
I recommend anaconda, it comes with the heavy dependencies of this
package: numpy
and scikit-image
Installation of deflicker
:
$ pip install deflicker
deflicker
expects all your pictures in one directory. The
alphabetical order has to be equivalent to the chronological order.
deflicker <inputfolder> [options]
-o <dir>, --outdir=<dir>
Output directory [default: deflickered]-w <N>, --window=<N>
Window size for rolling mean [default: 10]-q, --quiet
Only output errors and warnings-f <fmt>, --format=<fmt>
Output format for the scaled images [default: png]-s <s>, --sigma=<s>
Sigma for the sigma clipping