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Transfer Learning for Deep Learning with CNN

Do It For Me
Friday, 03 September 2021 / Published in Do IT For Me

Transfer Learning for Deep Learning with CNN

Introduction to Transfer Learning 

Transfer learning may be classified as a machine learning technique. The model created for one job is utilized as the starting point for the model for the second task in this scenario.

Deep learning’s most prevalent approach is transfer learning. We utilize a previously trained model as a starting point for computer vision in this way. Natural language processing activities are also time-consuming and resource-intensive. However, we will need to create a neural network model.

Because transfer learning is linked to a slew of issues. Multitasking and notion wandering, for example. It is not, however, just a field of deep learning study.

What is a Pre-Trained Model?

We require a previously trained model with a comparable problem to solve a problem. Instead of beginning from scratch to address comparable issues, we start with models that have been trained on previous problems.

How can I use Pre-trained Models?

Because there is a predetermined objective to utilize a model that has already been trained. In addition, in the pre-training model, the idea of transfer learning is crucial.

Consider your scenario while selecting pre-training models. The predictions we receive will be highly incorrect if the description of the problem at hand differs significantly from the language of the problem used to train the previously trained model.

Because the Keras library already has a large number of pre-trained architectures that may be utilized directly. Because it is large enough (1.2 million pictures) to establish a common model, the Imagenet dataset has been utilized extensively to develop multiple architectures. The issue statement, however, originates from the training model.

It can accurately categorize pictures into 1000 different item types. Furthermore, these 1000 picture categories reflect different types of items that we come across in our daily lives. For example, different breeds of dogs and cats, various household goods, different car kinds, and so on.

To generalize to pictures outside of the ImageNet dataset, we employ transfer learning. This only happens with models that have been previously trained. We also utilize the fine-tuned model to make changes to the pre-trained model. We presume that the pre-trained network has previously been thoroughly trained.

As a result, we don’t want to change the weight too soon. We generally utilize a lower learning rate while changing than when the model was first trained.

Ways to Fine-tune the model

  1. Feature extraction – We utilize a pre-trained model for the feature extraction technique since we may delete the output layer. In addition, with the new data set, we must employ the entire network as a fixed function extractor.
  2. Use the Architecture of the pre-trained model –When initializing and training the model, we leverage the architecture of the data set.
  3. Train some layers while freezing others –A partly trained model is another option for using a previously trained model. We also need to maintain the weights of the model’s initial layers frozen. All I need to do now is retrain the higher layers. We may experiment with the number of layers to freeze and train.
Transfer Learning for Deep Learning with CNN

Source

Scenario 1 – The size of the data set is small and the data similarity is very high 

Because the data similarity is so great in this situation, there is no need to maintain the model.

Despite the fact that, according to our issue description, we need to personalize and alter the output layer. Because we’re using a feature extractor that has trains itself.

In addition, we utilized an Imagenet-trained model to detect fresh picture sets including cats or dogs. To categorize two outputs: cat or dog, we’ll require pictures comparable to Imagenet.

Finally, we must alter the thick layer in this situation. In addition, instead of 1000, you must divide the final softmax layer into two groups.

Scenario 2 – The size of the data is small as well as data similarity is very low 

Pre-training model with (say k) layers. Additionally, when the freezing process completes, the leftover layers retrain themselves. 

In addition, the first layer is pre-trained to the lowest size possible. The frozen weights of these strata, on the other hand, are preserved.

Scenario 3 – The size of the data set is large, however, the Data similarity is very low 

Neural network training will be more successful in this scenario, especially. Because it contains a large amount of info. Furthermore, and maybe most importantly, the data we utilize is unique.

The data we utilize isn’t the same as what we use in training. As a result, it is preferable to train the neural network from the ground up using your data.

Scenario 4 – The size of the data is large as well as there is high data similarity

This is, in a sense, the most desirable circumstance. Because in this instance, the pre-trained model is more effective. We can also make good use of this paradigm.

You just need to utilize the model in order to retain the model’s architecture and starting weight. We may also retrain this model using the initialization weights from the pre-trained model.

Inductive learning and Inductive Transfer

In deep learning, we employ this type of transfer learning and have asked about the transfer of induction. As a result, it’s an area where the number of potential models decreases itself. This approach, on the other hand, is applicable to a variety of activities.

Transfer Learning for Deep Learning with CNN

Source

How to Use Transfer Learning?

 Two general approaches to transfer learning are the following. 

  • Develop Model Approach
  • Pre-trained Model Approach

a.Develop Model Approach

Select Source Task: When choosing a task, you must first choose an issue for predictive modeling. Problems with large amounts of data

Develop Source Model: After that, you must create an intelligent model for the first task. The model, however, must be superior to the naïve model. As a result, some of the models should outperform the naïve model.

Reuse Model: The model must be tweaked to fit the task. In addition, in the second job of interest, it utilizes itself as a starting point for models. In addition, depending on the modeling approach employed, this may comprise a portion of the model.

Transfer Learning for Deep Learning with CNN

Source

b. Pre-trained Model Approach

Select Source Model:

You must choose a nerve source model from the list of options. Many academic institutions release models with huge and difficult data sets.

 Reuse Model: 

As a beginning point, you can utilize a tens model. That is the purpose’s second job. Depending on the model, all of the model’s components include itself.

Tune Mode:

ENTROUTPUT Data models are accessible for the task you’re working on, and you’ll need to use them.

When to Use Transfer Learning?

To reduce time or improve performance, use learning transfer.

When it comes to transferring learning, there are three main benefits to consider.

Higher start:

 The initial skills of the source model are higher than them. 

Higher slope: 

 Model of origin Training skills. That’s not like that, it’s a sudden thing. 

High Anesthetic: 

 Trained model integration skills are not true.

Source

Conclusion

Transfer learning is a machine learning method where a model develops for a task reuses itself as the starting point for a model on a second task. Common examples of transfer learning in deep learning. When to use transfer learning on your own predictive modeling problems.

 

Sources

For more articles, CLICK HERE. 

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Tagged under: architecture, Develop Model Approach, Fine-tune the model, Higher slope, Higher start, ImageNet dataset, Pre-trained Model Approach, Reuse Model, Transfer Learning, Tune Mode

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1 Comment to “ Transfer Learning for Deep Learning with CNN”

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