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| fg_path = "fg"
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| a_path = "alpha"
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| bg_path = "bg"
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| out_path = "composited_images"
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| fg_files = [line.rstrip('\n') for line in open('./transparent-460-test-fg-names.txt')]
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| bg_files = [line.rstrip('\n') for line in open('./transparent-460-test-bg-names.txt')]
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| from PIL import Image
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| import os
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| import math
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| import time
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|
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| def composite4(fg, bg, a, w, h):
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|
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| bbox = fg.getbbox()
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| bg = bg.crop((0,0,w,h))
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|
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| fg_list = fg.load()
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| bg_list = bg.load()
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| a_list = a.load()
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|
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| for y in range(h):
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| for x in range (w):
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| alpha = a_list[x,y][0] / 255
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| t = fg_list[x,y][0]
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| t2 = bg_list[x,y][0]
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| if alpha >= 1:
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| r = int(fg_list[x,y][0])
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| g = int(fg_list[x,y][1])
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| b = int(fg_list[x,y][2])
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| bg_list[x,y] = (r, g, b, 255)
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| elif alpha > 0:
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| r = int(alpha * fg_list[x,y][0] + (1-alpha) * bg_list[x,y][0])
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| g = int(alpha * fg_list[x,y][1] + (1-alpha) * bg_list[x,y][1])
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| b = int(alpha * fg_list[x,y][2] + (1-alpha) * bg_list[x,y][2])
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| bg_list[x,y] = (r, g, b, 255)
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|
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| return bg
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|
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| num_bgs = 20
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|
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| bg_iter = iter(bg_files)
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| num = 0
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| for im_name in fg_files:
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|
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| im = Image.open(os.path.join(fg_path, im_name))
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| a = Image.open(os.path.join(a_path, im_name.split(".")[0]+".png"))
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| bbox = im.size
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| w = bbox[0]
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| h = bbox[1]
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|
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| if im.mode != 'RGB' and im.mode != 'RGBA':
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| im = im.convert('RGB')
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|
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| bcount = 0
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| for i in range(num_bgs):
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|
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| bg_name = next(bg_iter)
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| bg = Image.open(os.path.join(bg_path, bg_name))
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| if bg.mode != 'RGB':
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| bg = bg.convert('RGB')
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|
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| bg_bbox = bg.size
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| bw = bg_bbox[0]
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| bh = bg_bbox[1]
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| wratio = w / bw
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| hratio = h / bh
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| ratio = wratio if wratio > hratio else hratio
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| if ratio > 1:
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| bg = bg.resize((math.ceil(bw*ratio),math.ceil(bh*ratio)), Image.BICUBIC)
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|
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| out = composite4(im, bg, a, w, h)
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|
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| out.save(out_path + im_name[:len(im_name)-4] + '_' + str(bcount) + '.png', "PNG")
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| print(out_path + im_name[:len(im_name)-4] + '_' + str(bcount) + '.png')
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| bcount += 1
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| print("Finished")
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|
