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feat(gui): produce noise based on source image histogram
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from numpy import random | ||
from PIL import Image, ImageStat | ||
from typing import Tuple | ||
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import numpy as np | ||
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def blend_mask_inverse_source(source: Tuple[int, int, int], mask: Tuple[int, int, int], noise: int) -> Tuple[int, int, int]: | ||
m = float(noise) / 256 | ||
n = 1.0 - m | ||
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return ( | ||
int((source[0] * n) + (mask[0] * m)), | ||
int((source[1] * n) + (mask[1] * m)), | ||
int((source[2] * n) + (mask[2] * m)), | ||
) | ||
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def blend_source_histogram(source_image: Image, dims: Tuple[int, int], sigma = 200) -> Tuple[float, float, float]: | ||
r, g, b = source_image.split() | ||
width, height = dims | ||
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hist_r = r.histogram() | ||
hist_g = g.histogram() | ||
hist_b = b.histogram() | ||
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rng_r = random.choice(256, p=hist_r) | ||
rng_g = random.choice(256, p=hist_g) | ||
rng_b = random.choice(256, p=hist_b) | ||
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noise_r = rng_r.integers(0, size=width * height) | ||
noise_g = rng_g.integers(0, size=width * height) | ||
noise_b = rng_b.integers(0, size=width * height) | ||
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noise = Image.fromarray(zip(noise_r, noise_g, noise_b)) | ||
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return noise | ||
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# based on https://github.com/AUTOMATIC1111/stable-diffusion-webui/blob/master/scripts/outpainting_mk_2.py#L175-L232 | ||
def expand_image(source_image: Image, mask_image: Image, dims: Tuple[int, int, int, int], fill = 'white', blend_source=blend_source_histogram, blend_op=blend_mask_inverse_source): | ||
left, right, top, bottom = dims | ||
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full_width = left + source_image.width + right | ||
full_height = top + source_image.height + bottom | ||
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full_source = Image.new('RGB', (full_width, full_height), fill) | ||
full_source.paste(source_image, (left, top)) | ||
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full_mask = Image.new('RGB', (full_width, full_height), fill) | ||
full_mask.paste(mask_image, (left, top)) | ||
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full_noise = blend_source(source_image, (full_width, full_height)) | ||
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for x in range(full_source.width): | ||
for y in range(full_source.height): | ||
mask_color = full_mask.getpixel((x, y)) | ||
noise_color = full_noise.getpixel((x, y)) | ||
source_color = full_source.getpixel((x, y)) | ||
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if mask_color[0] > 0: | ||
full_source.putpixel((x, y), blend_op(source_color, mask_color, noise_color)) | ||
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return (full_source, full_mask, (full_width, full_height)) |
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