Most image editing software has gradient map functions. Gradient maps take the brightness of a given pixel and apply a gradient of colors according to brightness. Photoshop and other software have ways to automate this, but they can't do exactly what I want, so I thought Python might do the trick. Unfortunately I'm having a very hard time understanding or applying any of the results that come up when I search for gradient maps or color maps with Python.
All the potential solution threads I found used numpy or matplotlib which have lots of mathy lines that go right over my head... I would love some help with this. Initially I had something going with Processing, but I found the task of exporting tons of images with Processing to be weird and hacky. Plus I like Python, and want to learn how to edit and generate art with it.
This is what I'm working with right now.
from PIL import ImagemyPalette = ['#1A1423', '#684756', '#AB8476']def colorMap(pixel, palette): # Calculate the brightness of pixel R, G, B = pixel brightness = sum([R, G, B])/3 # Map gradient of colors to brightness # ???... return mappedColorimg = Image.open('image_input.png') pixels = img.load()for x in range(img.size[0]): for y in range(img.size[1]): pixel = img.getpixel((x, y)) pixels[x, y] = colorMap(pixel, myPalette)img.save('image_output.png')Loading, calculating brightness, and saving are easy. I just have no idea how to apply a gradient of my palette to the pixel.