色度

For instance, we could subsample the chroma of a 4:4:4 YCbCr stream by a factor of 4 horizontally, as shown in Figure 3c, to end up with a 4:1:1 YCbCr stream.

例如，我们可以如图3c 所示的那样，以比例因数"4"来对一个4：4：4 YCbCr 流的水平行上的色度进行子采样，从而得到4：1：1 YCbCr 流。

For more information: read about JPEG chroma subsampling.

更多信息请查阅jpeg色度抽样。

Also, as we'll see shortly, we can reduce chrominance bandwidth considerably via subsampling, without much loss in visual perception.

另外，正如我们马上就会看到的那样，我们可以通过子采样的方法，在视觉效果不会出现较大损失的前提下，大大减小色度信号带宽。

As a result, by subsampling these chroma values, video standards and compression algorithms can achieve large savings in video bandwidth.

于是，通过对这些色度值进行子采样的方法，视频标准和压缩算法可以大幅度缩减视频带宽。

Now, if we filter a 4:4:4 YCbCr signal by subsampling the chroma by a factor of 2 horizontally, we end up with 4:2:2 YCbCr.

现在，如果我们通过在水平方向上对色度信号进行因数为2的子采样，对一个4：4：4 YCbCr 信号进行滤波，于是将得到4：2：2 YCbCr 。

Does not employ chroma subsampling at all.

完全" "不使用色度部份取样。

In addition to reduce tracking error caused by various illumination conditions on stage, we considered only U and V values in CIE LUV color space to calculate the color differences in successive images.

此外，追踪演算法将撷取影像之RGB值转换至CIE LUV色彩空间后，仅针对其中代表色度资讯之U、V值计算影像色差，可减少舞台影像因照明改变所造成之追踪误差。

Automatic threshold choice is difficult and important to color images edge detection, First of all, on the base of human visual properties, threshold versus intensity function of human visual system are researched and analyzed, by using method of mathematic modeling and the result of saturation research, function of least color difference that can be perceptible by visual systems in detecting edge is given.

摘要自动阀值选取是彩色图像边缘检测的难点和关键问题，首先从人类的视觉特性出发，分析了人类视觉系统的亮度感知门限函数，利用数学建模方法和色度学方面的研究成果，给出人类视觉系统对彩色图像边缘所能识别的最小彩色差函数。

Textile and dyeing Wastewater is one of industrial Wastewater to be treated most difficulty. Wastewater of dyeing industry has complicated constituents, and usually contains many kinds of dyes .It has deep tinct and strong toxicity, and it is difficult to decompose it .

印染工业废水是极难处理的工业废水之一，印染工业废水组分复杂，常含有多种染料，色度深，毒性强，难降解，pH值波动大，而且浓度高，水量大。

The removal of TOC and color were found to be very sensitive to the reaction temperature.

初始TOC的去除率与双氧水的加入量成正比，色度与TOC的去除率有密切的关系。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。