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Feature Extractors

 

Slide comparing CNN layer diagram and feature-engineering pipeline with labeled image, feature vectors, and segmented volume

 

Intellesis Deep Features

  • Entire image as input for pre-trained network.
  • Note: If you use the CPU for segmentation with Deep Feature sets, the results can be different on different machines because they are hardware (CPU) dependent.
  • Take the output from an intermediate layer of that network as feature vector, e.g. output from layer 3 was processed by preceding layers 1 and 2.
    • Deep Features 50: Using layer 2 with reduced feature dimension = 50
    • Deep Features 64: Using layer 1 with full feature dimension = 64
    • Deep Features 70: Using layer 3 with reduced feature dimension = 70
    • Deep Features 128: Using layer 2 with full feature dimension = 128
    • Deep Features 256: Using layer 3 with full feature dimension = 256
VGG 19 diagram of 3x3 conv blocks conv1_1..conv5_4 with maxpool, depth=64..512 and FC1 FC2 softmax
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