采样

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。

Not considering subsample, these two filter banks retain more image details and better direction selectivity.

这两种全相位方向滤波器组不对图像下采样，保留了图像方向的细节信息，具有更好的方向选择性能且在恢复时，不需要重建滤波，方法简单；在对Contourlet变换的分级研究中，建立了一种全相位分级方法，由于全相位子带分解的优异性能，使得这种分级方法优于拉普拉斯金字塔分级方法。

In SAR azimuth signal processing, it is very common to subsample the raw data with a filter, which may reduce the Signal Noise Ratio of the raw image.

摘要机载合成孔径雷达的方位向降采样经常会降低原始图像的信噪比。

This allows us to save bandwidth in video and image representations by subsampling the color information.

这使得我们可以借助对色彩信息的子采样来节省视频和图像信息的带宽。

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。

Proposing to generate more samples by subsampling to deal withthe problem that RBMNN needs a great deal of data for training.

针对RBMNN需要大量样本进行训练的缺陷，提出了通过低采样由单个样本生成多个样本的思路。

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 。

Before subsampling, let's assume we have a full-bandwidth YCbCr stream. That is, a video source generates a stream of pixel components in the form of Figure 2a.

假设在进行子采样前，我们拥有一路全带宽的 YCbCr 流，即视频源产生了一路像素分量构成的数据流，其形式如图2a 所示。

Simulations based on hierarchical subsampling telescope search confirmed that LIEME/LOEME are superior to ME using 8bit luminance image.

模拟表明，在与层次化子采样望远镜算法结合下，4bit LEME结果与利用8bit亮度象素的ME算法相当，而计算量、缓冲存储器规模以及带宽等均下降50％。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。