warmingstripes.py

# place this file in folder with pngs or jpgs
# run with python warmingstripes.py
# will work with non warming stripes images 
# but will be an image with columns of the top row of pixels stretched down

from PIL import Image
import drawSvg as draw
import os

files = [i for i in os.listdir() if i.endswith("png") or i.endswith("jpg")]

for file in files:
    im = Image.open(file)   

    width, height = im.size

    colors = []
    stripes = [0]

    pointer = 0

    for x in range(width-1):
        r0,g0,b0 = im.getpixel((x,0))
        r1,g1,b1 = im.getpixel((x+1,0))

        if stripes[pointer] == 1:
            colors.append('#%02x%02x%02x' % (r0,g0,b0))
        
        if r0 == r1 and g0 == g1 and b0 == b1:
            stripes[pointer] = stripes[pointer] + 1
        else:
            pointer = pointer + 1
            stripes.append(1)

    d = draw.Drawing(width, height)

    index = 0
    pointer = 0

    for i in range(len(colors)):
        d.append(draw.Rectangle(pointer,0,stripes[index],height, fill=colors[index]))
        pointer = pointer + stripes[index]
        index = index + 1

    d.setPixelScale(1)  # Set number of pixels per geometry unit
    
    filename = file[:-4]

    d.saveSvg(filename + '.svg')