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01_​Preprocess_​image_​data

Preprocess image data

In this workflow we pre-process the image data, which we will use throughout the following example workflows.


Please note: The workflow series is heavily inspired by the great blog-post of François Chollet (see https://blog.keras.io/building-powerful-image-classification-models-using-very-little-data.html.)

1. Workflow 01 Preprocess image data: In this workflow we pre-process the image data, which we will use throughout the following example workflows. You can download the data from https://www.kaggle.com/c/dogs-vs-cats/data (file train.zip) and unzip it to a desired location.

2. Workflow 02 Train simple CNN
3. Workflow 03 Fine-tune VGG16 Python
4. Workflow 04 Fine-tune VGG16

In order to run the example, please make sure you have the following KNIME extensions installed:

- KNIME Deep Learning - Keras Integration (Labs)
- KNIME Image Processing (Community Contributions Trusted)
- KNIME Image Processing - Deep Learning Extension (Community Contributions Trusted)
- KNIME Image Processing - Python Extension (Community Contributions Trusted)
- KNIME Streaming Execution (Labs)

You also need a local Python installation that includes Keras. Please refer to https://www.knime.com/deeplearning#keras for installation recommendations and further information.

KNIME Deep Learning - Classify Cats and Dogs In this series of workflows we want to demonstrate how to solve an imageclassification problem using KNIME Deep Learning - Keras integration.We want to train a model to distinguish cats and dogs on images. Read, normalize and resizethe input images.Select folder ofunzipped train.zipFirst 12500 rowsare cats, rest dogs.We only work with 4000 randomly selected images.You can adjust the numberas desired.Write table with images to into data folder.Sort bypath name. Load and preprocessimages (Local Files) List Files Rule Engine Row Sampling Table Writer Sorter KNIME Deep Learning - Classify Cats and Dogs In this series of workflows we want to demonstrate how to solve an imageclassification problem using KNIME Deep Learning - Keras integration.We want to train a model to distinguish cats and dogs on images. Read, normalize and resizethe input images.Select folder ofunzipped train.zipFirst 12500 rowsare cats, rest dogs.We only work with 4000 randomly selected images.You can adjust the numberas desired.Write table with images to into data folder.Sort bypath name. Load and preprocessimages (Local Files) List Files Rule Engine Row Sampling Table Writer Sorter

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