GISer18’s gists

GISer18 / classifier_from_little_data_script_3.py

Created September 13, 2023 03:34 — forked from fchollet/classifier_from_little_data_script_3.py

Fine-tuning a Keras model. Updated to the Keras 2.0 API.

	'''This script goes along the blog post
	"Building powerful image classification models using very little data"
	from blog.keras.io.
	It uses data that can be downloaded at:
	https://www.kaggle.com/c/dogs-vs-cats/data
	In our setup, we:
	- created a data/ folder
	- created train/ and validation/ subfolders inside data/
	- created cats/ and dogs/ subfolders inside train/ and validation/
	- put the cat pictures index 0-999 in data/train/cats

GISer18 / classifier_from_little_data_script_2.py

Created September 13, 2023 03:34 — forked from fchollet/classifier_from_little_data_script_2.py

Updated to the Keras 2.0 API.

	'''This script goes along the blog post
	"Building powerful image classification models using very little data"
	from blog.keras.io.
	It uses data that can be downloaded at:
	https://www.kaggle.com/c/dogs-vs-cats/data
	In our setup, we:
	- created a data/ folder
	- created train/ and validation/ subfolders inside data/
	- created cats/ and dogs/ subfolders inside train/ and validation/
	- put the cat pictures index 0-999 in data/train/cats

GISer18 / classifier_from_little_data_script_1.py

Created September 13, 2023 03:34 — forked from fchollet/classifier_from_little_data_script_1.py

Updated to the Keras 2.0 API.

	'''This script goes along the blog post
	"Building powerful image classification models using very little data"
	from blog.keras.io.
	It uses data that can be downloaded at:
	https://www.kaggle.com/c/dogs-vs-cats/data
	In our setup, we:
	- created a data/ folder
	- created train/ and validation/ subfolders inside data/
	- created cats/ and dogs/ subfolders inside train/ and validation/
	- put the cat pictures index 0-999 in data/train/cats

GISer18 / keras_weighted_categorical_crossentropy.py

Created March 23, 2022 13:37 — forked from wassname/keras_weighted_categorical_crossentropy.py

Keras weighted categorical_crossentropy (please read comments for updated version)

	"""
	A weighted version of categorical_crossentropy for keras (2.0.6). This lets you apply a weight to unbalanced classes.
	@url: https://gist.github.com/wassname/ce364fddfc8a025bfab4348cf5de852d
	@author: wassname
	"""
	from keras import backend as K
	def weighted_categorical_crossentropy(weights):
	"""
	A weighted version of keras.objectives.categorical_crossentropy