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      Latest reply on Mar 21, 2020 1:11 AM by Hardy
      Hardy Level 1 Level 1 (0 points)

        The MPSCNNBatchNormalizationDataSource's optional methods updateGammaAndBetaWithCommandBuffer:batchNormalizationState: and updateMeanAndVarianceWithCommandBuffer:bathNormalizationState: should be used to update the state. To calculate the new state values (beta, gamma, mean and variance), MPSBatchNormalizationStatistics should be used, I suppose.


        Naturally, MPSBatchNormalizationStatistics requires for the calculation of these new values "source images" (e.g. encodeBatchToCommandBuffer:sourceImage:batchNormalizationState:). The source images should be the source images of the batch normalization node.


        But how do I access the input of the batch normalization node when  updateGammaAndBetaWithCommandBuffer:batchNormalizationState: is called? I could not find any possibility to access these data. Any clues?