ATI

ATI (Average Total Intensity) refers to the overall measure of light energy spread across a surface or within a specific area. In optical and imaging contexts, it quantifies how much total brightness or illumination is present, considering all angles and directions. Essentially, ATI helps assess how evenly or brightly a surface is lit, which can influence visibility, color accuracy, and image quality. It's a useful metric for optimizing lighting conditions in photography, display calibration, and other visual applications.