Function postprocess_output 

pub fn postprocess_output(
    model_output: &[f32],
    n: usize,
    max_plate_slots: usize,
    alphabet: &str,
    pad_char: char,
    remove_pad_char: bool,
    return_confidence: bool,
    region_output: Option<&[f32]>,
    region_labels: Option<&[String]>,
) -> Result<Vec<PlatePrediction>>

Decode the raw plate-head output tensor into PlatePrediction values.

Parameters

• model_output – flat f32 slice of shape (N * max_plate_slots * vocab_size).
• n – batch size.
• max_plate_slots – number of character positions.
• alphabet – the model’s character set.
• pad_char – padding character to strip from the right.
• remove_pad_char – whether to strip trailing pad_char.
• return_confidence– include per-character probabilities.
• region_output – optional flat f32 slice (N * num_regions) (already softmaxed).
• region_labels – label list for the region head.