[jira] [Created] (MADLIB-1304) Figure out image input shapes allowed for keras_fit()

["Frank McQuillan (JIRA)" <ji...@apache.org>]

Frank McQuillan created MADLIB-1304:
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             Summary: Figure out image input shapes allowed for keras_fit()
                 Key: MADLIB-1304
                 URL: https://issues.apache.org/jira/browse/MADLIB-1304
             Project: Apache MADlib
          Issue Type: Improvement
          Components: Module: Neural Networks
            Reporter: Frank McQuillan
             Fix For: v1.16


Context/assumption

Assume the user has the input shape correct to match the model architecture. It's up to them.

Story

Do not re-shape image inputs.

Add a validation check to fit() that input shape = model architecture expected shape (not 100% guarantee) but will help to catch many errors.

Options

channel first, e.g., (3, 224, 224)
channel last, (224, 224, 3)
flattened
other? YES - all shapes supported, we will just mini-batch and pass it along

Questions

1) Q: which input formats to support?
A: all

2) Q: What input validation to do?
A: Add a validation check in fit() to ensure input shape = model architecture expected shape (not 100% guarantee) but will help to catch many errors.

3) Q: Does current code in DL mini-batch pre-processor pack correctly as is and pass it thru?
A: Yes but need to do some testing





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