Questions tagged [tensorflow]
A Python library for machine learning, in particular for deep learning, originally created by Google.
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1answer
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Tensorflow choice of values of variables after training [on hold]
I am trying to build a neural network, that is able to perform a linear regression. After for example 1000 epochs, I encountered the situation, where the smallest loss-value was not the last loss-...
0
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1answer
15 views
Loss during minibatch gradient descent
I have minibatch gradient descent code in Tensorflow for function approximation, but I am unsure when to calculate the loss. First, I create batches for x and y data. Then, I shuffle both these ...
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0answers
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Is it possible to have a constent accuracy for my tensorflow network whatever is the iterations?
I am runing my tf NN composed by one input, one hidden and one output layers the number of hidden nodes if the half of total features number I have got the next table considering different learning ...
4
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1answer
32 views
Is this Tensorflow bias vector shaped correctly?
In the text I read the following:
I’m confused on the dimensions of the bias vector. How can we add a(m,1) vector to a(1, p) ...
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0answers
7 views
Model Training and test accuracy suddenly dropping for a Mulit Layer Perceptron from 98% to 9% (test)? [duplicate]
I was exploring the tensorflow library and was working on an MLP for the mnist dataset. It is 5 layers MLP trained for 10000 iterations on batches of 100.
After training the model up to 9000 ...
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0answers
8 views
CTC classification for License Plate with two lines
I have gone through this tutorial and have understanding how CTC works for end to end text recognition.
But for recognition of images with texts in two lines
Would it be able to use CTC for ...
0
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0answers
24 views
ML Regressor model performance conclusion RSME vs STD DEV
Perhaps my question is still slightly silly but apparently even though lot of folks talk about how to evaluate the rightness of your model there still blur the right evaluation procedure at least for ...
1
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1answer
21 views
What is the initial state of the tf.contrib.rnn.LSTMCell? [closed]
Does tf.contrib.rnn.LSTMCell assign itself an initial state of zeros or is it random for each batch or per complete run through (if I run the model twice will it have the same initial state both the ...
1
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0answers
11 views
Implementing WARP loss in tensorflow [closed]
I notice there are attempts to implement WARP loss in Keras such as (https://stackoverflow.com/questions/46299554/implimentation-of-warp-loss-in-keras) But I have not seen any githubs or publications ...
1
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0answers
7 views
Tensorflow InvalidArgumentError: The determinant is not finite [closed]
I'm trying to fit a Mixture of Gaussians to a data set. First the data is clustered using K-Means Clustering. Each cluster is then fitted with a Gaussian.To avoid inversion of large covariance matrix, ...
0
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1answer
13 views
How to reconstruct negative acceleration values using a simple autoencoder?
I am trying to reconstruct the acceleration values of a tri-axial accelerometer using a simple autoencoder. As acceleration values are often negative (e.g, -3.4) therefore using a ReLU activation ...
0
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0answers
15 views
Training on cifar100 [duplicate]
I am building a model on training a cifar100 images
I try to follow others work on training cifar10 and they work very well(around 90% accuracy), so I add some more layers for training cifar100.But ...
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3answers
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Is it possible to give variable sized images as input to convolutioal neural network
Can we give images with variable size as input to convolutional neural network for object detection? If possible, How can we do that?
But if we try to crop the image, we will be loosing some portion ...
0
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0answers
7 views
neural network doesn't fit boundaries [duplicate]
I'm new to machine learning and trying to fit a sample data set with neural networks in python using tensorflow. After having implemented the neural network in Dymola I want to compare the outputs of ...
1
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1answer
26 views
forget_bias interpretation in tensorflow
In Basic LSTM cell of tensorflow there is an argument named forget_bias. From the documentation of ...
0
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1answer
39 views
What is the difference between SSIM and MS-SSIM?
I would like to know what is the difference between SSIM and MS-SSIM? Also, there is a built-in function in Tensorflow for both of them, I am curious to know when should I use SSIM and when MS-SSIM?
...
0
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1answer
27 views
Understanding TensorFlow' conv2d for multiple output channels
I'm trying to understand the convolution process better by applying conv2d to different inputs. However I get unexpected result by transforming 3x3 matrix from 1 to ...
0
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1answer
60 views
What does decay_steps mean in Tensorflow tf.train.exponential_decay?
I am trying to implement an exponential learning rate decay with the Adam optimizer for a LSTM. I do not want the 'staircase = true' version. The decay_steps for me feels like the number of steps that ...
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2answers
28 views
Keras model optimization of 2D arrays
I am trying to train a CNN with 2D arrays of normalized numbers.
Example of 2D training array:
...
0
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1answer
15 views
Why the bias distribution in the last layer is always close to symmetric?
I am trying to train a very simple model, the first layer is full connection, while the output layer output 2 values to represent different categories.
...
0
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0answers
20 views
What is the efficient algorithm among Bagged Trees, Neural Network (TensorFlow) and C4.5?
I am performing a classification process over a collection of signals where each signal has 12 parameter. I need to predict my class/ label using those 12 features, the classes are 5 from 0 to 4 (It ...
1
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1answer
73 views
sample data for training neural networks for self-driving cars [closed]
If I ask the question in the wrong forum, let me know, I will delete it.
I want see sample data for training neural networks for self-driving cars. I understand that there will be geodata and image ...
1
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1answer
34 views
Is it reasonable to use VGG16 with a new fully-connected layer for binary image segmentation?
I am working on binary image segmentation of traffic signs (of which I have RGB images of size 224x224 and accompanying grayscale masks) where I want to classify each pixel as either part of a traffic ...
0
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1answer
35 views
Emotion detection: neural network overfitting on audio files
I am working on an analysis of audio data to understand emotions using the RAVDESS dataset.
The input is the Mel-frequency cepstral coefficients (MFCCs) of each audio file, extracted using a Python ...
2
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1answer
66 views
Tensorflow batch normalization for images - padding issue
I'm trying to train anomaly/defect detection network on custom images. Let say I have to detect scratches on special steel boxes and I have two views:
side view with dimension 2300 x 550 (width x ...
0
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0answers
30 views
Neural Network Parallel Architecture
I am a beginner to Machine Learning. While working on a personal project with VAEs, I had an idea. I will first give some background. Sometimes I have seen that it is common practice, when creating ...
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0answers
15 views
How to un-normalize the output of a GAN's generator in tensorflow
I am using the DCGAN framework to learn some specific image distribution as part of a bigger process (compressed sensing using GANs). The problem is that the ouput of the net is in the interval $[-1,1]...
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2answers
65 views
Deep Neural Network visualization on multi dimension datasets [closed]
I have seen the PlayGround of Tensorflow. But it is using only 2D values which means only 2 inputs are taken.
I have 7 inputs and the output is only 1.
See the datasets sample:
...
2
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1answer
39 views
I don't understand such a difference in the accuracy, please help
When I use a normalized values for the values of the target column in the following DL regression model I get a very good accuracy, and if I don't, the accuracy is a mess.
However I've reading that ...
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0answers
16 views
How to obtain embedded representation of single test instance after training
The first layer of my RNN is embedded layer as follows.
...
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0answers
49 views
Detection of number plate and digits/alphabets in one deep learning model
I tried to make a caffe-based deep learning model trained with number plate, digits and alphabet altogether.
But in testing, I detect only number plate.
I used both py-faster-rcnn and SSD.
Is it ...
1
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0answers
26 views
Visualizations not appearing in Tensorflow-PyCharm IDE [closed]
I am using PyCharm Community Edition and Python 3.7. Via Anaconda, I have installed the Tensorflow machine learning package.
I am following the regression tutorial here, but I am getting limited ...
0
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1answer
34 views
Object detection training: will mirroring images help or hinder?
Will Tensorflow training benefit from doubling the images by mirroring images (flipping horizontally)?
In other words, if the original image contains text that says: "this is a test", the mirrored ...
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0answers
8 views
Why does the Conv Neural Net using Tensorflow returns same predictions for all the data points [duplicate]
I am predicting usage quantity for different customers across different categories. Following is the network architecture.
...
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0answers
28 views
Use of variable 'states' in a recurrent neural network in tensorflow? [duplicate]
The output of RNN implementations in Tensorflow is a tuple [outputs, states]. I am a bit confused about the use of the states variable.
For example in this example of a simple LSTM implementation in ...
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0answers
64 views
CNN Flower recognition (5 classes) accuracy improvement
I have created a CNN for image recognition (Flower types - 5 classes) and am now considering model parameter changes to improve accuracy. The model (5 3*3conv + 4 2*2max pooling layers) attains ~60% ...
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0answers
111 views
Auxiliary loss function keras
I'm trying to write the custom loss function called ( Auxiliary loss function) which are two softmax loss functions put together that controls both the Context path and Spatial path of the network.
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0answers
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Forming Conditional Probabilities in tensorflow
This is a repost from stack, but I think it may be more applicable here. Granted there is even a bounty for it there, if someone could answer it.
https://stackoverflow.com/questions/53421179/forming-...
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0answers
16 views
How to group text categorical data basis on clustering?
So if I have text dataset where I have more than 50 categories.
Sample:
...
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1answer
36 views
Question about bounding boxes to handle false positives
I have trained a model to detect vehicle number plates. The issue is that it returns matches of partial plates, with high confidence. To eliminate partials I want to add two new boxes to the images ...
0
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1answer
71 views
Entropy of a Gaussian Process: Log(Determinant(CovarianceMatrix)) [closed]
I want to be able to compute the entropy of a Gaussian Process. To that end, I have a simple example in GPFLow. I have a latent function which I sample with two different levels of noise, L1 and L2 ...
0
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2answers
165 views
How to train a stock trading neural network so that the 'profit' parameter is maximized?
I am watching some beginner level video training on neural networks using Tensorflow / Keras to get a better understanding of how they work and how to best implement them.
I have some questions on ...
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0answers
21 views
Using TensorFlow sentence encoder and other parameters as features in SVM
I have 150K tagged samples of technical support chats between customers and technicians. The chats are classified into 2: “resolved”/ “unresolved” sessions (66.6% and 33.3% of the distribution ...
0
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1answer
42 views
Implementation of WAE-GAN does not match with the description in the paper
According to the litterature and specifically to this paper, the wasserstein autoencoders is an encoder-decoder architecture. So it must contain encoder and decoder parts.
in the algorithm ...
1
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1answer
102 views
RMSprop difference rho and decay in Tensorflow
As this post showed nicely, there is a difference between rho and the decay in RMSprop. I can't clearly see what tensorflows RMSprop parameter decays stands for. Is this the learning rate decay? And ...
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0answers
21 views
Training a multi inputs deep learning model using every combination of inputs?
I am beginner in deep learning. I want to create a multi inputs CNN model in Keras. The model takes two inputs of images to give the two images class. The
two images from differnt datasets that have ...
3
votes
1answer
73 views
How to cluster parts of broken line made of points?
I am studying clustering techniques and i am pretty new at this topic. Here is my problem: I created a 5 lines which are made of points. This lines are supposed to be continuous and they look like ...
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0answers
58 views
Recognition the same object from different views
I have 33 classes (33 different objects). I need to recognize the object from any view of the object. Like a packet of potato chips, the packet has different appearance from different view (as shown ...
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0answers
19 views
Training SSD like network for Number and Alphabet detection
I tried to read number plate using the model trained with SSD like network.
My network has only five layers.
I trained with 60,000 images for digits 0-9 and alphabets A-Z.
So one class has 2,000 ...
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0answers
22 views
Feature ranking for ANN
I am doing a regression analysis on 1 hidden layer feed forward NN and have 18 input features with 1 output. I Intend to do some feature ranking so it can give me an idea of the most important to the ...
