案例库 · 软件与 IT · 技术决策 · 1996–1999
这条还没译成中文，下面是英文原文。
HP and Microsoft's sRGB made one color space the web's silent default
sRGB picked a single reference CRT color and gamma 2.2, so images with no profile looked right on every screen without extra data.
Hewlett-Packard · Microsoft
那一手
By the 1990s, monitors produced brightness that was not linear with the input signal: a power law with an exponent around 2 to 3 that varied by CRT maker. Every vendor shipped a slightly different color space, so the same image could look different on every screen.
Attaching an ICC profile solved it for high-end users, but most files could not carry one and embedding one added overhead. HP and Microsoft proposed a single calibrated RGB space matched to the average CRT and a 2.2 gamma, and asked every OS and browser to assume it by default.
为什么管用
- Color profiles were accurate but heavy, and many image formats could not carry them at all, so a large class of users never had any profile.
- Most computer monitors, scanners and digital cameras are all native RGB devices, so one RGB space suited the whole chain.
- The space was set to the average CRT behavior and the PC video-card signal, meaning it matched what most hardware already did.
可以搬走什么
When interoperability is blocked by overhead, remove the overhead: make one canonical value the default so the common case needs no extra data at all.
后来呢
sRGB became IEC 61966-2-1 in 1999 and is now the assumed color space for images with no embedded profile. The W3C CSS3 color spec and the web's default color management depend on it, so unprofiled JPEGs and PNGs render consistently across browsers and displays.
资料来源
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