Questions tagged [cnn]
Convolutional Neural Networks (CNN, also called ConvNets) are a tool used for classification tasks and image recognition. The name giving first step is the extraction of features from the input data.
1,338 questions
0 votes
0 answers
5 views
What has Meta's "Ominlingual ASR" really learned?
Meta has recently published its new transcription model Omnilingual ASR: Open-Source Multilingual Speech Recognition for 1600+ Languages. However, I am somewhat sceptical about it, particularly given ...
3 votes
1 answer
59 views
Why training time alternates between 900s and 70s when training my keras sequential model?
I am training a model using Keras python library to recognize images of drawings that belong to two artists. Here is a screenshot of the flactuations I am seeing: 587/587 ━━━━━━━━━━━━━━━━━━━━ 906s 2s/...
2 votes
1 answer
66 views
How to determine the optimal number of training epochs when validation loss stabilizes but does not increase?
I’m training a CNN (DenseNet169) for a medical imaging task with ~12,000 training samples using fine-tuning (pretrained on ImageNet). I monitor both training and validation loss/accuracy. What I see ...
4 votes
1 answer
63 views
Using a CNN classification model on images that contain a scale bar
I'm using a CNN classification model that I trained to identify phytoplankton classes from png images. The images in the training set do not contain a scale bar. However, some of the datasets I want ...
7 votes
1 answer
103 views
Effects of resizing training images during preprocessing CNN classification model
I'm trying to train a CNN model to identify phytoplankton species from a training set. During preprocessing, the images are resized to 224x224, which seems to be stretching or compressing the object ...
0 votes
1 answer
58 views
when testing with shuffled data, accuracy is high, but when testing with unshuffled data, accuracy is low
To be clear, I shuffled my data when I trained it. It is only the testing data that I modified to be unshuffled, and found that accuracy tanks. (i also used the same data for training and for testing)
4 votes
1 answer
122 views
How to Select Effective Features from Color-Based Image Statistics for Glucose Prediction?
I am working on a regression task to estimate glucose concentration from image data. The images are of reagent test strips, where a chemical reagent reacts with a blood sample and changes colour (...
8 votes
3 answers
464 views
Best CNN architecture for multiple aligned grayscale images per instance
I’m working on a binary classification problem in a biomedical context, with ~15,000 instances. Each instance corresponds to a single biological sample (a cell), and for each sample I have three co-...
0 votes
0 answers
47 views
Neural Networks for Matrix Inversion
For my Bachelor's thesis, I am working on a project named "Neural Networks for Matrix Inversion" where deep learning methods are used to compute the inverse of a matrix in comparison to ...
2 votes
0 answers
77 views
Overfitting problem of convolutional neural network; how to fix?
So I've been working on this convolutional neural network but my accuracy is stuck at 62% without improving and I'm afraid I'm in rather severe situation with the overfitting issue. I've been trying ...
1 vote
0 answers
51 views
Using a differentiable Self-Organizing Map loss in a CNN
I've been trying to aggregate a normal CNN loss with a loss that quantifies how well we can cluster the second-to-last layer embeddings (i.e. feed the embeddings to a 2D Self Organizing Map (SOM) and ...
3 votes
0 answers
53 views
Time Series Forecasting Using Geospatial Data
I have spatio-temporal data with PM2.5 concentration at a daily timestamp for 51 latitudes and 51 longitudes (51 x 51 grid). I converted the netCDF files to a pandas dataframe with timestamp as the ...
1 vote
0 answers
47 views
Is one dataset with many images of the same person acceptable?
I am currently using a CNN for face detection. I plan to use open datasets to pre-train one neural network and fine-tune the neural network using images captured by my camera. The open datasets are ...
1 vote
0 answers
29 views
CNN strange learning behavior
I have implemented a classic feedforward NN (by myself) and it works fine. However, I added conv layers and now learning behavior is very strange. On a simple task (classifying zeros and Xs on a 28x28 ...
0 votes
0 answers
30 views
I would like to build an open source Traffic Signs Dataset solely for research purposes
I've been interested lately in doing research about different neural networks and how to contribute to Autonomous Vehicles, I used a couple of images to train a model and the results were different ...