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Whoa, What's This?

They told me, "Aryan, you sexy beast, it's impossible to make cool image effects using just Python!", and I set out to prove them wrong. And I did. Kind of.

Spider-Man (Original) Spider-Man (After Shading)
Original Image After Shading

Interpolation is simple

You blend two things in different quantities. Really, it's just that simple. Now what if we interpolated two colors together? That's the question I asked myself while high on caffeine. The program is equally simple:

  1. Take an image
  2. For every pixel, calculate its greyscale - the average of its R, G and B values (which goes from 0 - 255)
  3. Let's make a random color pallete, called the SOURCE_COLORS - [black, white]
  4. Based on greyscale, choose a color from SOURCE_COLORS - if greyscale is a small value (0 - 128), choose black, and choose white if it is large (128 - 255)
  5. Set this new color as the pixel color

Congratulations, you just made a black-and-white effect!

Pingle (Original) Pingle (After Shading)
Original Image After Black 'N White Shading

... what if we went further?

But that's just two colors - black and white. What if we added a little grey in between? How could we achieve that?

That's where interpolation is great - it allows us to mix black and white to form [black, GREY, white] after just 1 interpolation. Similarly, this becomes [black, DARK-GREY, grey, LIGHT-GREY, white] after 2 interpolations. I'm sure you can see where this is headed. You can keep interpolating, and the result will consist of multiple shades of SOURCE_COLORS.

The best part? All you have to do is tell the program how many times the colors should be mixed!

Let's try this with a different source colors - [black, purple, yellow, white]:

Dr. Stone (Original) Dr. Stone (After Shading)
Original Image After Shading

Let me remind you - I only changed the source colors, NOTHING ELSE. That's the power of interpolation and shading.

What? You still aren't impressed? I still have one trick up my sleeve.

Interpolation won't just shade everything with a different color - it can COMPLETELY CHANGE the image. Here's what happens with SOURCE_COLORS = [red / orange, white]:

NASA (Original) NASA (After Shading)
Original Image After Shading

BAM! How cool is that? Since black and the blue NASA circle are pretty similar in darkness, the interpolation replaced both of them with orange-red, giving us that sexy background look. This result was so surprisingly impressive, that I actually used this as my desktop background XD

But Aryan, I don't know how to start?

Don't worry my child, I have made everything clear in the source code. Read the documentation inside main.py, and you should be ready to go. Yes, it's that simple.

Potential Applications:

  • Adding subtle effects to a logo or design
  • Making images take a theme color, like with my NASA example
  • Getting you laid
  • Potentially bypassing copyright infringement, as you can completely change how an image looks, while keeping the content same