Function multi_threshold 

pub fn multi_threshold(
    input: &[u8],
    output: &mut [u8],
    thresholds: &[u8],
    levels: &[u8],
) -> Result<()>

Multi-level thresholding

Apply multiple thresholds to create multiple output levels.

Arguments

• input - Input data
• output - Output data
• thresholds - Sorted threshold values
• levels - Output level for each threshold range (length = thresholds.len() + 1)

Errors

Returns an error if parameters are invalid