Tag
luminance
- Jul 18, 2025 Computing the Flash Threshold: Luminance Steps, Area, and the Red Flash Rule Photosensitive seizures depend on the size, luminance delta, and frequency of a flashing region; how the general and red flash thresholds are defined, and why a small bright animation is a different risk from a full-screen one. accessibility
- Oct 17, 2023 Computing Relative Luminance and Contrast Ratios from sRGB Values The linearisation step, the weighted sum behind relative luminance, and why the WCAG ratio adds a constant to both values before dividing them. accessibility