Fuse per-channel Mul + Add into BatchNormalization - #1457
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Fuse `Add(Mul(X, scale), bias)` into `BatchNormalization` where `scale` and `bias` have shape `(1, C, 1, 1)` and `X` has shape `(B, C, H)` or `(B, C, H, W)`. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Fuse
Add(Mul(X, scale), bias)intoBatchNormalizationwherescaleandbiashave shape(1, C, 1, 1)andXhas shape(B, C, H)or(B, C, H, W).Tested with the model from https://huggingface.co/docling-project/docling-layout-heron-onnx.