diff options
author | Christian C <cc@localhost> | 2024-11-11 12:29:32 -0800 |
---|---|---|
committer | Christian C <cc@localhost> | 2024-11-11 12:29:32 -0800 |
commit | b85ee9d64a536937912544c7bbd5b98b635b7e8d (patch) | |
tree | cef7bc17d7b29f40fc6b1867d0ce0a742d5583d0 /code/sunlab/sunflow/models/encoder.py |
Initial commit
Diffstat (limited to 'code/sunlab/sunflow/models/encoder.py')
-rw-r--r-- | code/sunlab/sunflow/models/encoder.py | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/code/sunlab/sunflow/models/encoder.py b/code/sunlab/sunflow/models/encoder.py new file mode 100644 index 0000000..22d1a9a --- /dev/null +++ b/code/sunlab/sunflow/models/encoder.py @@ -0,0 +1,140 @@ +class Encoder: + """# Encoder Model + + Constructs an encoder model with a certain depth of intermediate layers of + fixed size""" + + def __init__(self, model_base_directory): + """# Encoder Model Initialization + + - model_base_directory: The base folder directory where the model will + be saved/ loaded""" + self.model_base_directory = model_base_directory + + def init(self): + """# Initialize a new Encoder + + Expects a model parameters file to already exist in the initialization + base directory when initializing the model""" + from tensorflow import keras + from tensorflow.keras import layers + + # Load in the model parameters + self.load_parameters() + assert self.depth >= 0, "Depth must be non-negative" + + # Create the model + self.model = keras.models.Sequential() + # At zero depth, connect input and output layer directly + if self.depth == 0: + self.model.add( + layers.Dense( + self.latent_size, + input_shape=(self.data_size,), + activation=None, + name="encoder_latent_vector", + ) + ) + # Otherwise, add fixed-sized layers between them + else: + self.model.add( + layers.Dense( + self.layer_size, + input_shape=(self.data_size,), + activation=None, + name="encoder_dense_1", + ) + ) + # Use LeakyReLU if specified + if self.use_leaky_relu: + self.model.add(layers.LeakyReLU()) + else: + self.model.add(layers.ReLU()) + # Include a droput layer if specified + if self.dropout > 0.0: + self.model.add(layers.Dropout(self.dropout)) + for _d in range(1, self.depth): + self.model.add( + layers.Dense( + self.layer_size, activation=None, name=f"encoder_dense_{_d+1}" + ) + ) + # Use LeakyReLU if specified + if self.use_leaky_relu: + self.model.add(layers.LeakyReLU()) + else: + self.model.add(layers.ReLU()) + # Include a droput layer if specified + if self.dropout > 0.0: + self.model.add(layers.Dropout(self.dropout)) + self.model.add( + layers.Dense( + self.latent_size, activation=None, name="encoder_latent_vector" + ) + ) + self.model._name = "Encoder" + return self + + def load(self): + """# Load an existing Encoder""" + from os import listdir + + # If the encoder is not found, return None + if "encoder.keras" not in listdir(f"{self.model_base_directory}/portable/"): + return None + # Otherwise, load the encoder + # compile=False suppresses warnings about training + # If you want to train it, you will need to recompile it + import tensorflow as tf + + self.model = tf.keras.models.load_model( + f"{self.model_base_directory}/portable/encoder.keras", compile=False + ) + self.model._name = "Encoder" + return self + + def save(self, overwrite=False): + """# Save the current Encoder + + - Overwrite: overwrite any existing encoder that has been saved""" + from os import listdir + + if overwrite: + self.model.save(f"{self.model_base_directory}/portable/encoder.keras") + return True + if "encoder.keras" in listdir(f"{self.model_base_directory}/portable/"): + return False + self.model.save(f"{self.model_base_directory}/portable/encoder.keras") + return True + + def load_parameters(self): + """# Load Encoder Model Parameters from File + The file needs to have the following parameters defined: + - data_size: int + - autoencoder_layer_size: int + - latent_size: int + - autoencoder_depth: int + - dropout: float (set to 0. if you don't want a dropout layer) + - use_leaky_relu: boolean""" + from pickle import load + + with open( + f"{self.model_base_directory}/portable/model_parameters.pkl", "rb" + ) as phandle: + parameters = load(phandle) + self.data_size = parameters["data_size"] + self.layer_size = parameters["autoencoder_layer_size"] + self.latent_size = parameters["latent_size"] + self.depth = parameters["autoencoder_depth"] + self.dropout = parameters["dropout"] + self.use_leaky_relu = parameters["use_leaky_relu"] + + def summary(self): + """# Returns the summary of the Encoder model""" + return self.model.summary() + + def __call__(self, *args, **kwargs): + """# Callable + + When calling the encoder class, return the model's output""" + return self.model(*args, **kwargs) |