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Image Classification API: Fix processing incomplete batch(<batchSize), images processed per epoch , enable EarlyStopping without Validation Set. Fixes #4274 and #4286 #4289

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Merged
ashbhandare merged 6 commits into from
Oct 4, 2019
Merged

Image Classification API: Fix processing incomplete batch(<batchSize), images processed per epoch , enable EarlyStopping without Validation Set. Fixes #4274 and #4286 #4289

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b451c25
In ImageClassification, process incomplete batch where number of samp…
ashbhandare Oct 2, 2019
6f2915b
fixed batchIndex not reseting in train loop, enabled EarlyStopping wh…
ashbhandare Oct 3, 2019
995b227
Merge branch 'master' into Issue4274
ashbhandare Oct 3, 2019
123f31f
fixed changing shape of feature and label tensor for incomplete batch…
ashbhandare Oct 3, 2019
3b614eb
Merge branch 'master' into Issue4274
ashbhandare Oct 4, 2019
034ce8e
Improved featureBatchSizeInBytes calculation, improved exception mess…
ashbhandare Oct 4, 2019
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73 changes: 73 additions & 0 deletions src/Microsoft.ML.Dnn/ImageClassificationTransform.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -186,6 +186,9 @@ private void CheckTrainingParameters(ImageClassificationEstimator.Options option

if (_session.graph.OperationByName(_labelTensor.name.Split(':')[0]) == null)
throw Host.ExceptParam(nameof(options.TensorFlowLabel), $"'{options.TensorFlowLabel}' does not exist in the model");
if (options.EarlyStoppingCriteria != null && options.ValidationSet == null && options.TestOnTrainSet == false)
throw Host.ExceptParam(nameof(options.EarlyStoppingCriteria), $"Early stopping enabled but unable to find a validation" +
$" set and/or train set testing disabled. Please disable early stopping or either provide a validation set or enable train set training.");
}

private (Tensor, Tensor) AddJpegDecoding(int height, int width, int depth)
Expand Down Expand Up @@ -381,6 +384,7 @@ private void TrainAndEvaluateClassificationLayer(string trainBottleneckFilePath,
float crossentropy = 0;
for (int epoch = 0; epoch < epochs; epoch += 1)
{
batchIndex = 0;
metrics.Train.Accuracy = 0;
metrics.Train.CrossEntropy = 0;
metrics.Train.BatchProcessedCount = 0;
Expand Down Expand Up @@ -432,6 +436,42 @@ private void TrainAndEvaluateClassificationLayer(string trainBottleneckFilePath,
}
}

//Process last incomplete batch
if (batchIndex > 0)
{
featureTensorShape[0] = batchIndex;
featureBatchSizeInBytes = sizeof(float) * featureLength * batchIndex;
labelTensorShape[0] = batchIndex;
labelBatchSizeInBytes = sizeof(long) * batchIndex;
runner.AddInput(new Tensor(featureBatchPtr, featureTensorShape, TF_DataType.TF_FLOAT, featureBatchSizeInBytes), 0)
.AddInput(new Tensor(labelBatchPtr, labelTensorShape, TF_DataType.TF_INT64, labelBatchSizeInBytes), 1)
.Run();

metrics.Train.BatchProcessedCount += 1;

if (options.TestOnTrainSet && statisticsCallback != null)
{
var outputTensors = testEvalRunner
.AddInput(new Tensor(featureBatchPtr, featureTensorShape, TF_DataType.TF_FLOAT, featureBatchSizeInBytes), 0)
.AddInput(new Tensor(labelBatchPtr, labelTensorShape, TF_DataType.TF_INT64, labelBatchSizeInBytes), 1)
.Run();

outputTensors[0].ToScalar<float>(ref accuracy);
outputTensors[1].ToScalar<float>(ref crossentropy);
metrics.Train.Accuracy += accuracy;
metrics.Train.CrossEntropy += crossentropy;

outputTensors[0].Dispose();
outputTensors[1].Dispose();
}

batchIndex = 0;
featureTensorShape[0] = batchSize;
featureBatchSizeInBytes = sizeof(float) * featureBatch.Length;
labelTensorShape[0] = batchSize;
labelBatchSizeInBytes = sizeof(long) * batchSize;
}

if (options.TestOnTrainSet && statisticsCallback != null)
{
metrics.Train.Epoch = epoch;
Expand All @@ -443,7 +483,15 @@ private void TrainAndEvaluateClassificationLayer(string trainBottleneckFilePath,
}

if (validationSet == null)
{
//Early stopping check
if (options.EarlyStoppingCriteria != null)
{
if (options.EarlyStoppingCriteria.ShouldStop(metrics.Train))
break;
}
continue;
}

batchIndex = 0;
metrics.Train.BatchProcessedCount = 0;
Expand Down Expand Up @@ -481,6 +529,31 @@ private void TrainAndEvaluateClassificationLayer(string trainBottleneckFilePath,
}
}

//Process last incomplete batch
if(batchIndex > 0)
{
featureTensorShape[0] = batchIndex;
featureBatchSizeInBytes = sizeof(float) * featureLength * batchIndex;
labelTensorShape[0] = batchIndex;
labelBatchSizeInBytes = sizeof(long) * batchIndex;
var outputTensors = validationEvalRunner
.AddInput(new Tensor(featureBatchPtr, featureTensorShape, TF_DataType.TF_FLOAT, featureBatchSizeInBytes), 0)
.AddInput(new Tensor(labelBatchPtr, labelTensorShape, TF_DataType.TF_INT64, labelBatchSizeInBytes), 1)
.Run();

outputTensors[0].ToScalar<float>(ref accuracy);
metrics.Train.Accuracy += accuracy;
metrics.Train.BatchProcessedCount += 1;
batchIndex = 0;

featureTensorShape[0] = batchSize;
featureBatchSizeInBytes = sizeof(float) * featureBatch.Length;
labelTensorShape[0] = batchSize;
labelBatchSizeInBytes = sizeof(long) * batchSize;

outputTensors[0].Dispose();
}

if (statisticsCallback != null)
{
metrics.Train.Epoch = epoch;
Expand Down