Mosaic Hot — Ssis698 4k Reducing

“Hot” pixels or hot regions are pixels (or clusters) that exhibit elevated dark current or amplified signal relative to neighbors, producing persistent bright points or areas, often worse at higher sensor temperatures or longer exposures. In densely packed 4K arrays, heat generation from on-chip processing (e.g., high-speed ADCs, column amplifiers) or insufficient thermal dissipation can exacerbate dark current nonuniformity and heighten mosaic-like irregularities.