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network/HDynamicLayer.py

@@ -383,7 +383,7 @@ class FunctionalSbS(torch.autograd.Function):
             grad_output /= last_grad_scale
         grad_output_scale = last_grad_scale.clone()
 
-        input /= input.sum(dim=1, keepdim=True, dtype=weights.dtype)
+        input /= input.sum(dim=1, keepdim=True, dtype=weights.dtype) + 1e-20
 
         # #################################################
         # User doesn't want us to calculate the gradients

network/NNMFLayer.py

@@ -249,7 +249,9 @@ class NNMFLayer(torch.nn.Module):
         else:
             self.last_input_data = None
 
-        input_convolved = input_convolved / input_convolved.sum(dim=1, keepdim=True)
+        input_convolved = input_convolved / (
+            input_convolved.sum(dim=1, keepdim=True) + 1e-20
+        )
 
         h = torch.tile(
             self._h_initial.unsqueeze(0).unsqueeze(-1).unsqueeze(-1),

network/build_network.py

@@ -5,10 +5,12 @@ from network.calculate_output_size import calculate_output_size
 from network.Parameter import Config
 from network.SbSLayer import SbSLayer
 from network.NNMFLayer import NNMFLayer
+from network.NNMFLayerSbSBP import NNMFLayerSbSBP
 from network.SplitOnOffLayer import SplitOnOffLayer
 from network.Conv2dApproximation import Conv2dApproximation
 from network.SbSReconstruction import SbSReconstruction
 from network.InputSpikeImage import InputSpikeImage
+from network.PoissonLayer import PoissonLayer
 
 
 def build_network(
@@ -476,6 +478,94 @@ def build_network(
             # Adding the x,y output dimensions
             input_size.append(network[-1]._output_size.tolist())
 
+        # #############################################################
+        # NNMF with SbS BP:
+        # #############################################################
+
+        elif (
+            cfg.network_structure.layer_type[layer_id].upper().startswith("BP SBS NNMF")
+            is True
+        ):
+
+            assert in_channels > 0
+            assert out_channels > 0
+
+            number_of_iterations: int = -1
+            if len(cfg.number_of_spikes) > layer_id:
+                number_of_iterations = cfg.number_of_spikes[layer_id]
+            elif len(cfg.number_of_spikes) == 1:
+                number_of_iterations = cfg.number_of_spikes[0]
+
+            assert number_of_iterations > 0
+
+            logging.info(
+                (
+                    f"Layer: {layer_id} -> NNMF Layer (SbS BP) with {number_of_iterations} iterations "
+                )
+            )
+
+            local_learning = False
+            if cfg.network_structure.layer_type[layer_id].upper().find("LOCAL") != -1:
+                local_learning = True
+
+            output_layer = False
+            if layer_id == len(cfg.network_structure.layer_type) - 1:
+                output_layer = True
+
+            network.append(
+                NNMFLayerSbSBP(
+                    number_of_input_neurons=in_channels,
+                    number_of_neurons=out_channels,
+                    input_size=input_size[-1],
+                    forward_kernel_size=kernel_size,
+                    number_of_iterations=number_of_iterations,
+                    epsilon_0=cfg.epsilon_0,
+                    weight_noise_range=weight_noise_range,
+                    strides=strides,
+                    dilation=dilation,
+                    padding=padding,
+                    w_trainable=w_trainable,
+                    device=device,
+                    default_dtype=default_dtype,
+                    layer_id=layer_id,
+                    local_learning=local_learning,
+                    output_layer=output_layer,
+                    keep_last_grad_scale=cfg.learning_parameters.kepp_last_grad_scale,
+                    disable_scale_grade=cfg.learning_parameters.disable_scale_grade,
+                )
+            )
+            # Adding the x,y output dimensions
+            input_size.append(network[-1]._output_size.tolist())
+
+        # #############################################################
+        # Poisson layer:
+        # #############################################################
+
+        elif (
+            cfg.network_structure.layer_type[layer_id].upper().startswith("POISSON")
+            is True
+        ):
+
+            number_of_spikes: int = -1
+            if len(cfg.number_of_spikes) > layer_id:
+                number_of_spikes = cfg.number_of_spikes[layer_id]
+            elif len(cfg.number_of_spikes) == 1:
+                number_of_spikes = cfg.number_of_spikes[0]
+
+            assert number_of_spikes > 0
+
+            logging.info(
+                (f"Layer: {layer_id} -> Poisson Layer with {number_of_spikes} spikes ")
+            )
+
+            network.append(
+                PoissonLayer(
+                    number_of_spikes=number_of_spikes,
+                )
+            )
+            # Adding the x,y output dimensions
+            input_size.append(input_size[-1])
+
         # #############################################################
         # Failure becaue we didn't found the selection of layer
         # #############################################################

network/build_optimizer.py

@@ -3,6 +3,7 @@ import torch
 from network.Parameter import Config
 from network.SbSLayer import SbSLayer
 from network.NNMFLayer import NNMFLayer
+from network.NNMFLayerSbSBP import NNMFLayerSbSBP
 
 from network.Conv2dApproximation import Conv2dApproximation
 from network.Adam import Adam
@@ -28,9 +29,10 @@ def build_optimizer(
             parameter_list_weights.append(network[id]._weights)
             parameter_list_sbs.append(True)
 
-        if (isinstance(network[id], NNMFLayer) is True) and (
+        if (
-            network[id]._w_trainable is True
+            (isinstance(network[id], NNMFLayer) is True)
-        ):
+            or (isinstance(network[id], NNMFLayerSbSBP) is True)
+        ) and (network[id]._w_trainable is True):
             parameter_list_weights.append(network[id]._weights)
             parameter_list_sbs.append(True)
 

network/load_previous_weights.py

@@ -5,6 +5,7 @@ import numpy as np
 
 from network.SbSLayer import SbSLayer
 from network.NNMFLayer import NNMFLayer
+from network.NNMFLayerSbSBP import NNMFLayerSbSBP
 
 from network.SplitOnOffLayer import SplitOnOffLayer
 from network.Conv2dApproximation import Conv2dApproximation
@@ -48,7 +49,9 @@ def load_previous_weights(
                 )
                 logging.info(f"Weights file used for layer {id} : {file_to_load[0]}")
 
-        if isinstance(network[id], NNMFLayer) is True:
+        if (isinstance(network[id], NNMFLayer) is True) or (
+            isinstance(network[id], NNMFLayerSbSBP) is True
+        ):
             filename_wilcard = os.path.join(
                 overload_path, f"Weight_L{id}_*{post_fix}.npy"
             )

network/save_weight_and_bias.py

@@ -5,6 +5,7 @@ from network.Parameter import Config
 import numpy as np
 from network.SbSLayer import SbSLayer
 from network.NNMFLayer import NNMFLayer
+from network.NNMFLayerSbSBP import NNMFLayerSbSBP
 from network.SplitOnOffLayer import SplitOnOffLayer
 from network.Conv2dApproximation import Conv2dApproximation
 
@@ -43,7 +44,9 @@ def save_weight_and_bias(
         # Save the NNMF Weights
         # ################################################
 
-        if isinstance(network[id], NNMFLayer) is True:
+        if (isinstance(network[id], NNMFLayer) is True) or (
+            isinstance(network[id], NNMFLayerSbSBP) is True
+        ):
             if network[id]._w_trainable is True:
 
                 np.save(