Update requirements.txt

requirements.txt

@@ -1,11 +1,21 @@
---extra-index-url https://download.pytorch.org/whl/cpu
-torch==2.1.2+cpu
-torchvision==0.16.2+cpu
+# requirements.txt — CPU attempt for detectron2 (best-effort)
+# NOTE: This pins to a PyTorch/Detectron2 combo that historically has CPU wheels available.
+# If Spaces uses a different python / wheel availability, this may still fail.
 
-# Detectron2 prebuilt CPU wheels for Torch 2.1 (no compiling)
--f https://dl.fbaipublicfiles.com/detectron2/wheels/cpu/torch2.1/index.html
-detectron2==0.6
+# Install PyTorch CPU (explicit) — the -f URL is used by pip to find the +cpu wheels.
+# These exact versions are chosen to match detectron2 wheels historically built for torch1.10.
+torch==1.10.0+cpu
+torchvision==0.11.1+cpu
+-f https://download.pytorch.org/whl/torch_stable.html
 
+# Detectron2 CPU wheel index (find-links). If a matching wheel exists for the above torch,
+# pip will install a prebuilt CPU wheel from this link.
+# If not found, pip will try to build from source (likely to fail on Spaces).
+detectron2==0.6 -f https://dl.fbaipublicfiles.com/detectron2/wheels/cpu/torch1.10/index.html
+
+# Common runtime deps for your app
 gradio==4.44.0
 opencv-python-headless
-numpy
+numpy
+Pillow
+protobuf<4