Replace UNet with DeepLabV3Plus in model loading for improved segmentation performance

app.py

@@ -294,7 +294,7 @@ def load_model(model_name):
             activation=None
         )
     elif config["architecture"] == "DeepLabV3Plus":
-        model = smp.Unet(
+        model = smp.DeepLabV3Plus(
             encoder_name=config["encoder"],
             encoder_weights="imagenet",
             # decoder_channels=(256, 128, 64, 32, 16), # Not used in DeepLabV3Plus