Function render_yuv422_uyvy 

pub fn render_yuv422_uyvy(
    width: usize,
    height: usize,
    background: u8,
    blobs: &[(f64, f64)],
    peak: f64,
    sigma: f64,
) -> Vec<u8> 

Render a width x height YUV422 (UYVY-packed) image of the same neutral-gray scene as render_mono8: each pixel’s luma (Y) is the Mono8 value and the shared chroma (U, V) is neutral (128). The byte order is [U, Y0, V, Y1] per horizontal pixel pair, matching machine_vision_formats::pixel_format::YUV422. Stride equals width * 2.

width must be even (each 4-byte group encodes two pixels).