Function compute_profiles 

pub fn compute_profiles(
    data: &NDDataBuffer,
    x_size: usize,
    y_size: usize,
    threshold: f64,
    centroid_x: f64,
    centroid_y: f64,
    cursor_x: usize,
    cursor_y: usize,
) -> ProfileResult

Compute profile projections for a 2D image.

• Average X/Y: column/row averages over the full image
• Threshold X/Y: column/row averages using only pixels >= threshold
• Centroid X/Y: single row/column at the centroid position (rounded)
• Cursor X/Y: single row/column at cursor position