showstack / glossary / edge-blend
Edge blend 邊緣融合
Overlapping two or more projectors and ramping the brightness down across the overlap so the join disappears. The maths is easy; matching black level, colour and lamp age across the blend is what actually takes the day.
中文
讓兩台以上投影機的畫面重疊，並在重疊區將亮度漸變下降，使接縫消失。計算本身不難，真正耗時的是讓融合區兩側的黑階、色彩與燈泡老化程度一致。
Regional usage
| Where | Term | Note |
|---|---|---|
| UK / US | Edge blend / soft edge | |
| HK / TW | 邊緣融合 |
Easy to get wrong
Blending cannot fix black level. In a blended overlap two projectors both put up their black floor, so the overlap is visibly lighter in dark content no matter how good the ramp is.
Next to this
Sources
- Projection blending fundamentals — Wikipedia
Understand the mechanism
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