datagen | Multi-process test data files generator | Runtime Evironment library
kandi X-RAY | datagen Summary
kandi X-RAY | datagen Summary
DataGen is a multi-process test data files generator. This is handy when you want to generate large test data files (e.g. XMLs, JSONs, CSVs, etc), over multiple processes, utilising available CPU cores on your machine. It's also very easy to generate random numbers, dates, and strings as test data. You only need to create template files, no scripting involved.
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QUESTION
I am doing super resolution with resnet in keras and I have split my data into train and test (70-30) and from the test data 20% for validation .i am trying to read the data with datagen.flow_from_directory but its showing 0 images for 0 classes .The main issue is i dont have classes. I only have high resolution images and low resolution images. The high resolution images goes to output and the low resolution images goes to input. How can i load the data without separating them in classess
...ANSWER
Answered 2021-Jun-07 at 09:53To resolve 0 images for 0 classes, notice that a common mistake is that the target folder you specify has no subdirectory. ImageDataGenerator
splits data to classes, based on each subdirectory under the directory you specify as it's first argument. So, you should have at least one subdirectory under the target.
Furthermore, the generator should label them in order to feed them to your network. By default it uses categorical method as a 2D one-hot encoded labels. But if you want your labels in other ways, set class_mode
argument. For example for autoencoders that inputs has no label, you should specify it as class_mode=input
.
Base on the docs here, class_mode
should be one of these:
categorical
will be 2D one-hot encoded labels, (Default Mode)binary
will be 1D binary labels,sparse
will be 1D integer labels,input
will be images identical to input images (mainly used to work with autoencoders).None
, no labels are returned (the generator will only yield batches of image data, which is useful to use withmodel.predict()
)
QUESTION
I am trying to train a classification model using Keras in a Colab notebook but the problem is that when I try to fit my augmented model it stops in the validation steps showing the error:
ValueError: rate must be a scalar tensor or a float in the range [0, 1), got 1
I have been searching on the web but I can not find this error.The code is the next:
...ANSWER
Answered 2021-May-17 at 22:40after setting droput rate 0.2, it started working
QUESTION
I have a Convolutional neural network (VGG16) that performs well on a classifying task on 26 image classes. Now I want to visualize the data distribution with t-SNE on tensorboard. I removed the last layer of the CNN, therefore the output is the 4096 features. Because the classification works fine (~90% val_accuracy) I expect to see something like a pattern in t-SNE. But no matter what I do, the distribution stays random (-> data is aligned in a circle/sphere and classes are cluttered). Did I do something wrong? Do I misunderstand t-SNE or tensorboard? It´s my first time working with that.
Here´s my code for getting the features:
...ANSWER
Answered 2021-May-15 at 09:31After weeks I stopped trying it with tensorboard. I reduced the number of features in the output layer to 256, 128, 64 and I previously reduced the features with PCA and Truncated SDV but nothing changed.
Now I use sklearn.manifold.TSNE and visualize the output with plotly. This is also easy, works fine and I can see appropriate patterns while t-SNE in tensorboard still produces a random distribution. So I guess for the algorithm in tensorboard it´s too many classes. Or I made a mistake when preparing the data and didn´t notice that (but then why does PCA work?)
If anyone knows what the problem was, I´m still curious. But in case someone else is facing the same problem, I´d recommend trying it with sklearn.
QUESTION
I'm new to Tensorflow and Machine learning in general. I'm trying to create a model to detect brain tumor through MRIs.
I'm splitting the data using validation_split
. After compiling the model when when I try to fitting using the .fit
function I get this Error. After googling I have found I might be because I'm not passing the y
parameter when calling the fit
function.
Code:
...ANSWER
Answered 2021-May-11 at 12:08This is because you set the loss to None
, no gradient is provided from the loss function back to your model. Modify
QUESTION
Lets take the most basic code:
...ANSWER
Answered 2021-May-10 at 17:30You want to use the IsVisible
field. It is listed here: https://swharden.com/scottplot/cookbooks/4.1.13-beta/api/plottable/scatterplot/#isvisible
The documentation isn't there, but IsVisible
is what you think it is.
Your code becomes this:
QUESTION
Hey im playing minecraft with a own created modpack i made on curseforge but im getting the following error/crash when i create a world.
...ANSWER
Answered 2021-May-05 at 12:40You're using dev.onyxstudios.cca
, whatever that might be, and it is using reflection to get at a field named type
of some unspecified class.
It is either trying to get at the field named type
of one of JDK's own classes, in which case the fix is to uninstall whatever JDK you installed and install AdoptOpenJDK11: You're on a too-new version of java and these most recent versions have been breaking apps left and right by disabling aspects of the reflective API.
Or, it is trying to get to a field named type
in one of the classes of the FABRIC project, perhaps, whatever that might be, based on the content of this error message. In which case, the problem is a version incompatibility between these two plugins. Look up the project pages of these 2 plugins and install 2 versions whose release dates are close together. This usually involves downgrading the more recently updated one.
QUESTION
I am coming from medical background and a newbie in this machine learning field. I am trying to train my U-Net model using keras and tensorflow for image segmentation. However, my loss value is all NaN and the prediction is all black.
I would like to check the U-Net layer by layer but I don't know how to feed the data and from where to start. What I meant by checking for each layer is that I want to feed my images to first layer for example and see the output from the first layer and then moving on to the second layer and until to the last layer. Just want to see how the output is produced for each layer and to check from where the nan value is started. Really appreciate for your help.
These are my codes.
...ANSWER
Answered 2021-Apr-20 at 05:24To investigate your model layer-by-layer please see example how to show summary of the model and also how to save the model:
QUESTION
I am trying to sink a stream into filesystem in csv format using PyFlink, however it does not work.
...ANSWER
Answered 2021-Apr-21 at 13:25I shamelessly copy Dian Fu's reply in http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Flink-Not-able-to-sink-a-stream-into-csv-td43105.html.
You need to set the rolling policy for filesystem. You could refer to the Rolling Policy section [1] for more details.
Actually there are output and you could execute command ls -la /tmp/output/
, then you will see several files named “.part-xxx”.
For your job, you need to set the execution.checkpointing.interval
in the configuration and sink.rolling-policy.rollover-interval
in the property of Filesystem connector.
The job will look like the following:
QUESTION
I want to do the same as F. Chollet's notebook but in C#.
However, I can't find a way to iterate over my KerasIterator object:
...ANSWER
Answered 2021-Apr-13 at 13:15As of April 19. 2020 it is not possible with the .NET Wrapper as documented in this issue on the GitHub page for Keras.NET
QUESTION
I'm training a network from a paper which says the following:
"We resize all the images to (256, 256) and normalize them by a mean and standard deviation of 0.5 across RGB channels before passing them through the respective networks."
I'm using the ImageDataGenerator class followed by flow_from_directory() to get my images from a directory of training set images.
I can't figure out which combination of parameters I need to use in order to end up with each image having a mean of 0.5 and standard deviation of 0.5 across the pixels in each RGB channel.
My current implementation is as follows:
...ANSWER
Answered 2021-Apr-08 at 07:47If you really want to avoid putting that into preprocessing (which would appear to me to be the easiest way - adding a preprocessing_function
to the ImageDataGenerator) you can start your network with a Multiply and an Add layer, to scale (by 0.5, because your Std is now 1) and to shift (by 0.5, because your mean is now 0) - please be aware that both Multiply and Add layers require the arguments to be tensors of the same size, so see the doc how to create arbitrary tensors.
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