import sys
import os
from PIL import Image
from PIL import ImageChops
from PIL import ImageFile
ImageFile.LOAD_TRUNCATED_IMAGES = True
import math

def trim(im):
    bg = Image.new(im.mode, im.size, im.getpixel((0,0)))
    diff = ImageChops.difference(im, bg)
    diff = ImageChops.add(diff, diff, 2.0, -100)
    bbox = diff.getbbox()
    if bbox:
        return im.crop(bbox)

dir = os.fsencode('./18')
images = [1 for file in os.listdir(dir)]
n = len(images)
size = 6000
basic_height = 300
background = Image.new('RGBA', (size, size), (0, 0, 0, 255))
x = 1
y = 1
i = 0
for file in os.listdir(dir):
    i += 1
    print(n, i, file)
    image = Image.open(os.path.join(dir, os.fsencode(file)))
    curr_x, curr_y = image.size
    image.thumbnail((math.floor(curr_x / curr_y * basic_height), basic_height), Image.ANTIALIAS)
    if x + image.size[0] > size:
        x = 1
        y += basic_height
    background.paste(image, (x, y))
    x += image.size[0]
    if x > size:
        x = 1
        y += basic_height
    if y > size:
        print('NOT ENOUGH PLACE')
trim(background).save('result_18.png')