nolearn

Realtime Data augmentation in Lasagne

若如初见. 提交于 2019-12-12 09:09:49
问题 I need to do realtime augmentation on my dataset for input to CNN, but i am having a really tough time finding suitable libraries for it. I have tried caffe but the DataTransform doesn't support many realtime augmentations like rotating etc. So for ease of implementation i settled with Lasagne . But it seems that it also doesn't support realtime augmentation. I have seen some posts related to Facial Keypoints detection where he's using Batchiterator of nolearn.lasagne . But i am not sure

How to calculate F1-micro score using lasagne

╄→尐↘猪︶ㄣ 提交于 2019-12-11 11:49:14
问题 import theano.tensor as T import numpy as np from nolearn.lasagne import NeuralNet def multilabel_objective(predictions, targets): epsilon = np.float32(1.0e-6) one = np.float32(1.0) pred = T.clip(predictions, epsilon, one - epsilon) return -T.sum(targets * T.log(pred) + (one - targets) * T.log(one - pred), axis=1) net = NeuralNet( # your other parameters here (layers, update, max_epochs...) # here are the one you're interested in: objective_loss_function=multilabel_objective, custom_score=(

Convolutional Neural Network accuracy with Lasagne (regression vs classification)

 ̄綄美尐妖づ 提交于 2019-12-10 22:54:22
问题 I have been playing with Lasagne for a while now for a binary classification problem using a Convolutional Neural Network. However, although I get okay(ish) results for training and validation loss, my validation and test accuracy is always constant (the network always predicts the same class). I have come across this, someone who has had the same problem as me with Lasagne. Their solution was to set regression=True as they are using Nolearn on top of Lasagne. Does anyone know how to set this

Realtime Data augmentation in Lasagne

房东的猫 提交于 2019-12-04 16:13:39
I need to do realtime augmentation on my dataset for input to CNN, but i am having a really tough time finding suitable libraries for it. I have tried caffe but the DataTransform doesn't support many realtime augmentations like rotating etc. So for ease of implementation i settled with Lasagne . But it seems that it also doesn't support realtime augmentation. I have seen some posts related to Facial Keypoints detection where he's using Batchiterator of nolearn.lasagne . But i am not sure whether its realtime or not. There's no proper tutorial for it. So finally how should i do realtime

How can you train multiple neural networks simultaneously in nolearn/lasagne/theano on Python?

拟墨画扇 提交于 2019-12-02 12:21:33
问题 I am writing a calibration pipeline to learn the hyperparameters for neural networks to detect properties of DNA sequences*. This therefore requires training a large number of models on the same dataset with different hyperparameters. I am trying to optimise this to run on GPU. DNA sequence datasets are quite small compared to image datasets (typically 10s or 100s of base-pairs in 4 'channels' to represent the 4 DNA bases, A, C, G and T, compared to 10,000s of pixels in 3 RGB channels), and

nolearn for multi-label classification

帅比萌擦擦* 提交于 2019-12-01 11:46:28
I tried to use DBN function imported from nolearn package, and here is my code: from nolearn.dbn import DBN import numpy as np from sklearn import cross_validation fileName = 'data.csv' fileName_1 = 'label.csv' data = np.genfromtxt(fileName, dtype=float, delimiter = ',') label = np.genfromtxt(fileName_1, dtype=int, delimiter = ',') clf = DBN( [data, 300, 10], learn_rates=0.3, learn_rate_decays=0.9, epochs=10, verbose=1, ) clf.fit(data,label) score = cross_validation.cross_val_score(clf, data, label,scoring='f1', cv=10) print score Since my data has the shape(1231, 229) and label with the shape

nolearn for multi-label classification

老子叫甜甜 提交于 2019-12-01 08:38:38
问题 I tried to use DBN function imported from nolearn package, and here is my code: from nolearn.dbn import DBN import numpy as np from sklearn import cross_validation fileName = 'data.csv' fileName_1 = 'label.csv' data = np.genfromtxt(fileName, dtype=float, delimiter = ',') label = np.genfromtxt(fileName_1, dtype=int, delimiter = ',') clf = DBN( [data, 300, 10], learn_rates=0.3, learn_rate_decays=0.9, epochs=10, verbose=1, ) clf.fit(data,label) score = cross_validation.cross_val_score(clf, data,

How to calculate the number of parameters for convolutional neural network?

≯℡__Kan透↙ 提交于 2019-11-27 10:10:36
I'm using Lasagne to create a CNN for the MNIST dataset. I'm following closely to this example: Convolutional Neural Networks and Feature Extraction with Python . The CNN architecture I have at the moment, which doesn't include any dropout layers, is: NeuralNet( layers=[('input', layers.InputLayer), # Input Layer ('conv2d1', layers.Conv2DLayer), # Convolutional Layer ('maxpool1', layers.MaxPool2DLayer), # 2D Max Pooling Layer ('conv2d2', layers.Conv2DLayer), # Convolutional Layer ('maxpool2', layers.MaxPool2DLayer), # 2D Max Pooling Layer ('dense', layers.DenseLayer), # Fully connected layer (

How to calculate the number of parameters for convolutional neural network?

只愿长相守 提交于 2019-11-26 15:06:30
问题 I'm using Lasagne to create a CNN for the MNIST dataset. I'm following closely to this example: Convolutional Neural Networks and Feature Extraction with Python. The CNN architecture I have at the moment, which doesn't include any dropout layers, is: NeuralNet( layers=[('input', layers.InputLayer), # Input Layer ('conv2d1', layers.Conv2DLayer), # Convolutional Layer ('maxpool1', layers.MaxPool2DLayer), # 2D Max Pooling Layer ('conv2d2', layers.Conv2DLayer), # Convolutional Layer ('maxpool2',