Now, it’s getting Image:
  kept: false,
  isDisposedInternal: false,
  shape: [ 1, 600, 800, 3 ],
  dtype: 'int32',
  size: 1440000,
  strides: [ 1440000, 2400, 3 ],
  dataId: {},
  id: 918,
  rankType: '4',
  scopeId: 2
}
Error: This execution contains the node 'StatefulPartitionedCall/map/while/exit/_727', which has the dynamic op 'Exit'. Please use model.executeAsync() instead. Alternatively, to avoid the dynamic ops, specify the inputs [StatefulPartitionedCall/map/TensorArrayV2Stack_1/TensorListStack]

If use loadSavedModel(savedModel) without the conversion, it works fine for both jpg and png images.