pub fn render_diff_image(
candidate: &RgbaImage,
_diff_mask: &[bool],
_component_labels: &[u32],
regions: &[Region],
) -> RgbaImageExpand description
Generate a visual diff image showing the candidate with highlighted change regions.
The candidate image is shown at full fidelity. Each region’s bounding box gets a semi-transparent color fill and a solid border outline, making it easy to see exactly which areas of the page changed.