Add color statistics logging in generate3d function

inference.py

@@ -100,4 +100,7 @@ def generate3d(model, rgb, ccm, device):
     end_time = time.time()
     elapsed_time = end_time - start_time
     print(f"uv takes {elapsed_time}s")
+
+    print("Raw color min/max/mean:", colors.min(), colors.max(), colors.mean())
+    print("Scaled color min/max/mean:", colors.min(), colors.max(), colors.mean())
     return mesh_path_glb+".obj"