Fix grad-cam OpenGL deps: add libgl1/libglu1, remove dynamic pip install

Dockerfile

@@ -12,10 +12,12 @@ ENV PYTHONDONTWRITEBYTECODE=1
 ENV PYTHONUNBUFFERED=1
 ENV MPLCONFIGDIR=/app/matplotlib_cache
 
-# Install minimal system dependencies for headless OpenCV
+# Install minimal system dependencies for headless OpenCV (required by grad-cam)
 RUN apt-get update && apt-get install -y \
     libglib2.0-0 \
     libgomp1 \
+    libgl1 \
+    libglu1 \
     curl \
     && rm -rf /var/lib/apt/lists/*
 

requirements.txt

@@ -16,10 +16,10 @@ grad-cam
 
 # Data visualization
 matplotlib>=3.7.0
-
+opencv-python
 # Utilities
 requests>=2.31.0
 tqdm>=4.65.0
-
+gradio
 # JSON handling and validation
 pydantic>=2.0.0

src/explain.py

@@ -19,19 +19,9 @@ try:
     from pytorch_grad_cam.utils.model_targets import ClassifierOutputTarget
     from pytorch_grad_cam.utils.image import show_cam_on_image, preprocess_image
     PYTORCH_GRAD_CAM_AVAILABLE = True
-except ImportError:
-    print("Warning: pytorch-grad-cam not available. Installing...")
-    import subprocess
-    import sys
-    subprocess.check_call([sys.executable, "-m", "pip", "install", "grad-cam"])
-    try:
-        from pytorch_grad_cam import GradCAM
-        from pytorch_grad_cam.utils.model_targets import ClassifierOutputTarget
-        from pytorch_grad_cam.utils.image import show_cam_on_image, preprocess_image
-        PYTORCH_GRAD_CAM_AVAILABLE = True
-    except ImportError:
-        PYTORCH_GRAD_CAM_AVAILABLE = False
-        print("Warning: Could not import pytorch-grad-cam after installation")
+except ImportError as e:
+    print(f"Warning: pytorch-grad-cam not available: {e}")
+    PYTORCH_GRAD_CAM_AVAILABLE = False
 
 class CropDiseaseExplainer:
     """High-level interface for crop disease explanation using pytorch-grad-cam"""