CV-Instagram-Filters

Python remake of the Gotham Instagram filter

Four easy steps

Using numpy, scikit-image, and a profound artistic vision (required to copy the most popular Instagram filter available)

Original image

A nice shot, but with a dull colour palette. Really missing a lot of potential detail around the sky and clouds - also colours look desaturated, and white/black balance is off on both ends.

1. Mid tone colour boost

Lets add some vibrancy.

* Red snow and sky? I don't know about that..

2. Bluer Blacks

Lets add some depth to the low end.

4. Sharpening the image

This step take most of the time for executing the script. It takes approximately 3s on an Odroid C2.

Now look at those fluffy trees,

5. Blue channel boost in lower-mids, decrease in upper-mids

6. Finally, add a vignette for that vintage look

Final image on the left, original on the right.

Summary

The depth of colours around the boots is nice, as is the extra contrast on the snow capped trees. The increased vibrancy has turned the snow and sky an unwanted redish colour - the vibrancy modification needs to be turned down on the R channel. Vignette looks good however I think i'd like to see it even stronger.

Overall, it's turned a dull shot into a great playful image. All while maintaing true to the original Instagram Gothom filter.

Execution Time on Odroid C2

With image saving at each step :

# python -W ignore gotham.py
  Instagram Filter Remake: Gotham
  Elapsed time: 6.295s

Without image saving :

# python gotham.py 
  Instagram Filter Remake: Gotham
  Elapsed time: 4.848s

Installation on Odroid

Install SciPy following this guide. basically running this :
sudo apt-get install python-numpy python-scipy python-matplotlib ipython python-pandas python-sympy python-nose
Install Cython (required to build scikit-image)
apt install cython
Install scikit-image (new version of skimage)
pip install scikit-image

3isenHeiM/CV-Instagram-Filters