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| from PIL import Image | |
| def hex_to_rgb(value): | |
| value = value.lstrip('#') | |
| length = len(value) | |
| return tuple(int(value[i:i + length // 3], 16) for i in range(0, length, length // 3)) | |
| def luminance(color): | |
| # Use the ITU-R BT.709 formula | |
| r, g, b = color | |
| return 0.2126 * r + 0.7152 * g + 0.0722 * b | |
| # def interpolate_color(color1, color2, factor): | |
| # return tuple(int(c1 * (1 - factor) + c2 * factor) for c1, c2 in zip(color1, color2)) | |
| def quadratic_interpolate(factor): | |
| #make the interpolation closer to the second color | |
| return factor ** 2 | |
| def interpolate_color(color1, color2, factor): | |
| adjusted_factor = quadratic_interpolate(factor) | |
| return tuple(int(c1 * (1 - adjusted_factor) + c2 * adjusted_factor) for c1, c2 in zip(color1, color2)) | |
| def remap_image_colors(image_path, hex_palette): | |
| # img = Image.open(image_path) | |
| img = Image.fromarray(image_path) | |
| rgb_palette = [hex_to_rgb(hex_code) for hex_code in hex_palette] | |
| sorted_palette = sorted(rgb_palette, key=luminance) | |
| img_rgb = img.convert("RGB") | |
| pixels = img_rgb.load() | |
| for y in range(img.height): | |
| for x in range(img.width): | |
| original_color = pixels[x, y] | |
| lum = luminance(original_color) | |
| # Find the closest palette colors by luminance (one darker, one brighter) | |
| prev_color = sorted_palette[0] | |
| next_color = sorted_palette[-1] | |
| for i in range(1, len(sorted_palette)): | |
| if luminance(sorted_palette[i]) > lum: | |
| next_color = sorted_palette[i] | |
| prev_color = sorted_palette[i-1] | |
| break | |
| # Interpolate between the two closest colors | |
| lum_range = luminance(next_color) - luminance(prev_color) | |
| if lum_range == 0: | |
| mapped_color = prev_color | |
| else: | |
| factor = (lum - luminance(prev_color)) / lum_range | |
| mapped_color = interpolate_color(prev_color, next_color, factor) | |
| pixels[x, y] = mapped_color | |
| img_rgb.save("result.jpg") | |
| # hex_palette = ['#db5a1e', '#555115', '#9a690e', '#1f3a19', '#da8007', '#9a0633', '#b70406', '#d01b4b', '#e20b0f', '#f7515d'] | |
| # remap_image_colors('estampa.jpg', hex_palette) | |