The three color channels of each pixel were regard as 3-dimensional vector, and the unit directional vector and its magnitude represented the chromaticity and the pixel brightness separately.

将每个像素的三个色彩通道看成是一个三维矢量，则矢量的单位方向向量和亮度分别表示像素的色彩和亮度。

youdao

Either has a maximum 1280x1024 resolution with a 5ms pixel response time, 1,000:1 contrast ratios, 250cd/m2 brightness and VGA only for input.

两款显示器均支持1280x1024的最佳分辨率，响应时间为5ms，对比度为1000：1，亮度打250cd/m2，视频输入接口则只设置哦VGA接口。

youdao

The number of photons collected by a pixel, and therefore the pixel value, is a measure of the flux, and thus of the brightness of the light source.

一个像素所收集到的光量子数，也就是像素值，是测量的光通量的方式，即反映了光源的亮度。

youdao

Shades of grey are created by tilting the mirror backwards and forwards thousands of times a second to vary the brightness of the pixel it is projecting.

ECONOMIST: Curtains for celluloid

So... hyperbole aside, the FX30 is thin and features a 3.6x LEICA DC VARIO-ELMARIT optical zoom lens, 7.2 megapixel CCD, Mega OIS optical image stabilization, Venus Engine III image-processing for shooting at ISO 1250, and a 2.5-inch 207k pixel LCD (the L74 throws down 230k pixels) with "Power LCD" to boost brightness by 40% (at the expense of battery life) when outdoors.

ENGADGET: Panasonic's DMC-FX30 wide-angle 7.2 megapixel shooter: not quite the world's slimmest