better

.gitignore

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+/__pycache__/
+/venv/

README.md

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+`python -m venv venv`
+
+`./venv/Scripts/activate`
+
+`pipreqs --force`

main.py

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+from PIL import Image, ImageDraw, ImageFont
+import os
+import math
+import random
+
+
+def resize_with_crop(img, target_size):
+    """Resize an image with cropping to match the target aspect ratio."""
+    width, height = img.size
+    target_width, target_height = target_size
+    aspect = target_width / target_height
+
+    if width / height > aspect:
+        new_width = int(height * aspect)
+        left = (width - new_width) // 2
+        img = img.crop((left, 0, left + new_width, height))
+    else:
+        new_height = int(width / aspect)
+        top = (height - new_height) // 2
+        img = img.crop((0, top, width, top + new_height))
+
+    return img.resize(target_size, Image.Resampling.LANCZOS)
+
+
+def load_small_images(directory, target_size):
+    """Load and resize small images from a directory."""
+    small_images = []
+    for filename in os.listdir(directory):
+        if filename.lower().endswith(('.png', '.jpg', '.jpeg')):
+            try:
+                img = Image.open(os.path.join(directory, filename))
+                img = resize_with_crop(img, target_size)
+                small_images.append(img)
+            except Exception as e:
+                print(f"无法加载图片: {filename}, 错误: {e}")
+    return small_images
+
+
+def create_text_image(text, output_size, font_path=None, font_size=1800):
+    """Create a grayscale image with the target text."""
+    temp_img = Image.new('L', output_size, 0)
+    draw = ImageDraw.Draw(temp_img)
+
+    font = load_font(font_path, font_size)
+    bbox = draw.textbbox((0, 0), text, font=font, anchor="lt")
+
+    text_x = (output_size[0] - (bbox[2] - bbox[0])) // 2
+    text_y = (output_size[1] - (bbox[3] - bbox[1])) // 2
+
+    draw.text((text_x, text_y), text, fill=255, font=font)
+    return temp_img
+
+
+def load_font(font_path, font_size):
+    """Load a font, falling back to default if unavailable."""
+    try:
+        return ImageFont.truetype(font_path or "simhei.ttf", font_size)
+    except:
+        try:
+            return ImageFont.truetype("msyh.ttc", font_size)
+        except:
+            print("警告: 未找到中文字体，可能无法正确显示中文")
+            return ImageFont.load_default()
+
+
+def paste_small_images(small_images, rows, cols, small_img_size, temp_img, output_img):
+    """Paste small images onto the output image based on the text mask."""
+    for y in range(rows):
+        for x in range(cols):
+            box = (
+                x * small_img_size[0],
+                y * small_img_size[1],
+                (x + 1) * small_img_size[0],
+                (y + 1) * small_img_size[1]
+            )
+            sample_x = box[0] + small_img_size[0] // 2
+            sample_y = box[1] + small_img_size[1] // 2
+
+            if sample_x < temp_img.width and sample_y < temp_img.height:
+                small_img = random.choice(small_images)
+                small_img = prepare_small_image(small_img, box, temp_img.getpixel((sample_x, sample_y)))
+                output_img.paste(small_img, box, small_img if small_img.mode == "RGBA" else None)
+
+
+def prepare_small_image(small_img, box, pixel_value):
+    """Prepare a small image for pasting, applying transparency if needed."""
+    small_img = small_img.resize((box[2] - box[0], box[3] - box[1]))
+    if pixel_value <= 128:
+        small_img = small_img.convert("RGBA")
+        alpha = small_img.split()[3].point(lambda p: p * 0.6)
+        small_img.putalpha(alpha)
+    return small_img
+
+
+def create_character_mosaic(target_text, small_images_dir, output_path, output_size=(7680, 4320), small_img_size=(60, 60)):
+    """Main function to create a character mosaic."""
+    small_images = load_small_images(small_images_dir, (100, 100))
+    if not small_images:
+        raise ValueError("没有找到可用的图片")
+
+    temp_img = create_text_image(target_text, output_size)
+    cols = math.ceil(output_size[0] / small_img_size[0])
+    rows = math.ceil(output_size[1] / small_img_size[1])
+
+    output_img = Image.new('RGB', (cols * small_img_size[0], rows * small_img_size[1]))
+    paste_small_images(small_images, rows, cols, small_img_size, temp_img, output_img)
+
+    output_img.save(output_path)
+    print(f"图片已保存到: {output_path}")
+
+
+if __name__ == "__main__":
+    target_text = "WIN"
+    small_images_dir = "images"
+    output_path = "youbang_poster.jpg"
+
+    if not os.path.exists(small_images_dir):
+        os.makedirs(small_images_dir)
+        print(f"请将小图片放入 {small_images_dir} 目录中")
+    else:
+        create_character_mosaic(target_text, small_images_dir, output_path)

requirements.txt

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+Pillow==11.1.0