Initial Dansori character workspace

2026-07-04 10:34:46 +09:00
commit 5a419816ff
2480 changed files with 38692 additions and 0 deletions
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+from __future__ import annotations
+
+from collections import deque
+from pathlib import Path
+
+import numpy as np
+from PIL import Image, ImageFilter
+
+
+ROOT = Path(__file__).resolve().parents[1]
+REFERENCE = ROOT / "03_Assets" / "Reference"
+PARTS = ROOT / "03_Assets" / "Parts" / "Images"
+RAW = REFERENCE / "sori_generated_apose_raw.png"
+
+SRC_W, SRC_H = 520, 900
+
+
+def load_source() -> Image.Image:
+    return Image.open(RAW).convert("RGBA")
+
+
+def checker_background_mask(img: Image.Image) -> np.ndarray:
+    arr = np.array(img.convert("RGBA"))
+    rgb = arr[:, :, :3].astype(np.int16)
+    alpha = arr[:, :, 3]
+    light_gray = (rgb.min(axis=2) > 218) & ((rgb.max(axis=2) - rgb.min(axis=2)) < 18)
+    transparent = alpha < 8
+    candidate = light_gray | transparent
+
+    h, w = candidate.shape
+    seen = np.zeros_like(candidate, dtype=bool)
+    q: deque[tuple[int, int]] = deque()
+    for x in range(w):
+        if candidate[0, x]:
+            q.append((x, 0))
+        if candidate[h - 1, x]:
+            q.append((x, h - 1))
+    for y in range(h):
+        if candidate[y, 0]:
+            q.append((0, y))
+        if candidate[y, w - 1]:
+            q.append((w - 1, y))
+
+    while q:
+        x, y = q.popleft()
+        if seen[y, x] or not candidate[y, x]:
+            continue
+        seen[y, x] = True
+        if x > 0:
+            q.append((x - 1, y))
+        if x < w - 1:
+            q.append((x + 1, y))
+        if y > 0:
+            q.append((x, y - 1))
+        if y < h - 1:
+            q.append((x, y + 1))
+    return seen
+
+
+def remove_checker_background(img: Image.Image) -> Image.Image:
+    bg = checker_background_mask(img)
+    alpha = Image.fromarray((~bg).astype(np.uint8) * 255, "L")
+    alpha = alpha.filter(ImageFilter.GaussianBlur(0.65)).point(lambda p: 0 if p < 28 else min(255, int(p * 1.18)))
+    out = img.copy()
+    out.putalpha(alpha)
+    return out
+
+
+def normalize_canvas(img: Image.Image) -> Image.Image:
+    bbox = img.getbbox()
+    if bbox is None:
+        raise RuntimeError("source image has no visible pixels")
+    crop = img.crop(bbox)
+    ratio = min(430 / crop.width, 850 / crop.height)
+    resized = crop.resize((round(crop.width * ratio), round(crop.height * ratio)), Image.Resampling.LANCZOS)
+    canvas = Image.new("RGBA", (SRC_W, SRC_H), (0, 0, 0, 0))
+    canvas.alpha_composite(resized, ((SRC_W - resized.width) // 2, 24))
+    return canvas
+
+
+def save_part(master: Image.Image, name: str, box: tuple[int, int, int, int]) -> None:
+    mask = Image.new("L", master.size, 0)
+    part_alpha = master.getchannel("A").crop(box)
+    mask.paste(part_alpha, box)
+    out = master.copy()
+    out.putalpha(mask.filter(ImageFilter.GaussianBlur(0.25)))
+    out.save(PARTS / name)
+
+
+def main() -> None:
+    PARTS.mkdir(parents=True, exist_ok=True)
+    master = normalize_canvas(remove_checker_background(load_source()))
+    master.save(PARTS / "sori_part_master_apose.png")
+
+    # Coarse Live2D source parts. Boxes are in the normalized 520x900 master coordinate system.
+    boxes = {
+        "sori_part_head.png": (135, 8, 385, 255),
+        "sori_part_neck.png": (215, 220, 305, 295),
+        "sori_part_chest.png": (112, 212, 408, 435),
+        "sori_part_pelvis.png": (145, 385, 375, 505),
+        "sori_part_upperarm_l.png": (342, 250, 465, 452),
+        "sori_part_forearm_l.png": (370, 360, 500, 535),
+        "sori_part_hand_l.png": (382, 428, 520, 590),
+        "sori_part_upperarm_r.png": (55, 250, 178, 452),
+        "sori_part_forearm_r.png": (20, 360, 150, 535),
+        "sori_part_hand_r.png": (0, 428, 138, 590),
+        "sori_part_thigh_l.png": (260, 438, 385, 675),
+        "sori_part_thigh_r.png": (135, 438, 260, 675),
+        "sori_part_shin_l.png": (262, 640, 370, 825),
+        "sori_part_shin_r.png": (150, 640, 258, 825),
+        "sori_part_foot_l.png": (258, 780, 375, 900),
+        "sori_part_foot_r.png": (145, 780, 262, 900),
+    }
+    for name, box in boxes.items():
+        save_part(master, name, box)
+    print(PARTS / "sori_part_master_apose.png")
+
+
+if __name__ == "__main__":
+    main()