new front page demo settings, remove pillow_avif import entirely

server.py

@@ -15,14 +15,14 @@ from PIL import Image
 import numpy as np
 import cv2
 
-try:
-    import pillow_avif  # noqa: F401  registers the AVIF codec with Pillow
-except Exception:
-    pass
-
 from PBC2_4 import PBC, PBC2Config, PBC2Result, preload_numba
 from PBC3 import PBC3, PBC3Config
 
+import importlib.util
+from PIL import features, __version__ as PIL_VERSION
+print(f"[startup] Pillow {PIL_VERSION} · native AVIF={features.check('avif')} · "
+      f"plugin_installed={importlib.util.find_spec('pillow_avif') is not None}", flush=True)
+
 app = FastAPI(title="PBC Compression Demo")
 
 # Maps the UI's resampling labels to PBC2.4 config resample names.
@@ -296,8 +296,17 @@ async def stream_compress(image: UploadFile = File(...), downsample_initialize:
     img = Image.open(io.BytesIO(raw)).convert("RGB")
 
     def gen():
-        for ev in PBC3.compress_stream(img, auto_downsample_init=_truthy(downsample_initialize),
-                                       patch_count=600, frame_every=6):
+        for ev in PBC3.compress_stream(
+            img,
+            auto_downsample_init=_truthy(downsample_initialize),
+            patch_count=150,
+            max_patch_size=48,     # each patch covers a small region, not the whole image
+            min_cell_size=1,       # coarse cells → low-detail blocks
+            max_cell_size=16,
+            q_start=0.5, q_end=0.1,
+            search_q_start=0.5, search_q_end=0.1,
+            frame_every=3,
+        ):
             if ev["event"] == "frame":
                 yield json.dumps({"image": _png_b64(ev["image"])}) + "\n"