ML.NET 1.4.0-preview2

New Features

• Deep Neural Networks Training (0.16.0-preview2)

  Improves the in-preview ImageClassification API further:

  • Early stopping feature stops the training when optimal accuracy is reached (#4237)
  • Enables inferencing on in-memory images (#4242)
  • PredictedLabel output column now contains actual class labels instead of uint32 class index values (#4228)
  • GPU support on Windows and Linux (#4270, #4277)
  • Upgraded TensorFlow .NET version to 0.11.3 (#4205)

  In-memory image inferencing sample Early stopping sample GPU samples

• New ONNX Exporters (1.4.0-preview2)

  • LpNormNormalizing transformer (#4161)
  • PCA transformer (4188)
  • TypeConverting transformer (#4155)
  • MissingValueIndicator transformer (#4194)

Bug Fixes

• OnnxSequenceType and ColumnName attributes together doesn't work (#4187)
• Fix memory leak in TensorflowTransformer (#4223)
• Enable permutation feature importance to be used with model loaded from disk (#4262)
• IsSavedModel returns true when loaded TensorFlow model is a frozen model (#4262)
• Exception when using OnnxSequenceType attribute directly without specify sequence type (#4272, #4297)

Samples

• TensorFlow full model retrain sample (#4127)

Breaking Changes

None.

Obsolete API

• OnnxSequenceType attribute that doesn't take a type (#4272, #4297)

Enhancements

• Improve exception message in LightGBM (#4214)
• FeaturizeText should allow only outputColumnName to be defined (#4211)
• Fix NgramExtractingTransformer GetSlotNames to not allocate a new delegate on every invoke (#4247)
• Resurrect broken code coverage build and re-enable code coverage for pull request (#4261)
• NimbusML entrypoint for permutation feature importance (#4232)
• Reuse memory when copying outputs from TensorFlow graph (#4260)
• DateTime to DateTime standard conversion (#4273)
• CodeCov version upgraded to 1.7.2 (#4291)

CLI and AutoML API

None.

Remarks

None.