Configures the image reader that reads base64 encoded images and corresponding labels from a file.
Base64ImageDeserializer(filename, streams)
| filename | (str): file name of the input file dataset that contains images and corresponding labels |
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Form: `[sequenceId <tab>] <numerical label (0-based class id)> <tab> <base64 encoded image>`
Similarly to the ImageDeserializer, the sequenceId prefix is optional and can be omitted.