face mask

face mask的基本解释

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[化] 面具, 防护面具

与face mask相关的网络例句 [注：此内容来源于网络，仅供参考]

There are various face masks in the world such as dace mask , welding mask , anti-fog face mask , medical face mask , fencing mask , cosmetic mask , anti-radiation face mask , oxygen face mask and so on. People use these face masks to protect their faces or change their appearance.

这个世界上有各式各样的面罩：舞会面罩、电焊面罩、防雾面罩、医疗面罩、击剑面罩、美容面罩、防辐射面罩、氧气面罩等等，人们用它来保护自己的脸面或者改变自己的脸面。

It solves the problem that the unitary contour presentation can not correctly extract face contour in a face image which suffers from scale, rotation etc. The definition of the internal and external energy function is provided. At the same time, the global matching algorithm and local matching algorithm is given. The experiment shows that this presentation and the accompanying matching algorithm can be used to extract the face contour very well. So the image segmentation can be implemented by using it.②By analyzing the recognition principle of PCA method, we can conclude that the face images coming from different surrounding consist of different face image space. This is the essential reason that makes the generality of PCA method worse. Also, we give a measurement means to measure the distance from different face image space, so we can analyze face image space more conveniently.③We also construct various scale models and rotation pose models to detect the scale and rotating angle of face image to be recognized. The experiment results show that the detecting precision is very high. So it is good for face image feature extraction and face image representation.④Similarly, we construct local feature models of face image and utilize them to detect the local feature of face image. At the same time, we put forward a novel face image local feature detection algorithm, locating step by step. The experiment results show that this method can accurately detect the location of local face feature in a image.⑤A novel face image presentation model, dual attribute graph , is put forward. Firstly, it utilizes attribute graph to present the face image, then exact the local principal component coefficient and Gabor transform coefficient of thc pixels which corresponds to the nodes of the graph as the attribute of the nodes. This representation fully makes use of the statistical characteristic of the local face feature and utilizes Gabor transform to present the topographical structure of face image. So DAG has more general property.⑥Based on the DAG presentation, we give a DAG matching function and matching algorithm. During the design of the function and algorithm, the noise factor, e. g., lighting, scale and rotation pose are considered and tried to be eliminated. So the algorithm can give more general property.⑦A general face image recognition system is implemented. The experiment show the system can get better recognition performance under the noise surrounding of lighting, scale and rotation pose.

本文在上述研究的基础上，取得了如下主要研究成果：①构造了一个通用的人脸轮廓模型表示，解决了由于人脸图象尺度、旋转等因素而使得仅用单一轮廓表示无法正确提取人脸轮廓的问题，并给出了模型内、外能函数的定义，同时给出了模型的全局与局部匹配算法，实验表明，使用这种表示形式以及匹配算法，能够较好地提取人脸图象的轮廓，可实际用于人脸图象的分割；②深入分析了PCA方法的识别机制，得出不同成象条件下的人脸图象构成不同的人脸图象空间的结论，同时指出这也是造成PCA方法通用性较差的本质原因，并给出了不同人脸空间距离的一种度量方法，使用该度量方法能够直观地对人脸图象空间进行分析；③构造了各种尺度模板、旋转姿势模板以用于探测待识人脸图象的尺度、旋转角度，实验结果表明，探测精确度很高，从而有利于人脸图象特征提取，以及图象的有效表示；④构造了人脸图象的各局部特征模板，用于人脸图象局部特征的探测；同时提出了一种新的人脸图象局部特征探测法---逐步求精定位法，实验结果表明，使用这种方法能够精确地得到人脸图象各局部特征的位置；⑤提出了一种新的人脸图象表示法---双属性图表示法；利用属性图来表示人脸图象，并提取图节点对应图象位置的局部主成分特征系数以及Gabor变换系数作为图节点的属性，这种表示方法充分利用了人脸图象的局部特征的统计特性，并且使用Gabor变换来反映人脸图象的拓扑结构，从而使得双属性图表示法具有较强的通用性；⑥在双属性图表示的基础上，给出双属性图匹配函数及匹配算法，在函数及算法设计过程中，考虑并解决了光照、尺度、旋转姿势变化等因素对人脸图象识别的影响，使得匹配算法具有较强的通用性；⑦设计并实现了一个通用的人脸图象识别系统，实验结果表明，该系统在图象光照、尺度、旋转姿势情况下，得到了较好的识别效果。

The use of a trough-shaped CRT shadow mask, distance of up to 0.24mm, it is a combination of SONY Trinitron and traditional grid-like mask mask punctate characteristics: pure flat two-dimensional extension of the trough-shaped mask, Compared to traditional point-like mask to space more available to more electronic liquidity to allow more light to reach the screen, the CRT image accuracy, brightness, contrast and color purity has been improved, so more light a clearer picture, and this structure is also conducive to the improvement of resolution and distance.

该显像管使用了槽状荫罩，点距可达0.24mm，它综合了SONY特丽珑栅状荫罩和传统点状荫罩的特点：纯平面两维伸展的槽状荫罩，比起传统点状荫罩来间隙更多，可得到更大的电子流通量，让更多的光线到达屏幕，所以显像管的图像精度、亮度、对比度和色纯度都有了提高，从而获得更亮更清晰的画面，而且这种结构也有利于分辨率和点距的提高。

与face mask相关的网络解释 [注：此内容来源于网络，仅供参考]

Face mask：口罩

大街上看不到一个戴口罩(face mask)的,上班还照样上班,没一个人表现出恐惧. 新闻里还在为开放美墨边境辩护,觉得美国离不开繁忙的美墨边境,关不得,关了也没用,政府也在尽力安抚人心,觉得美国的病例症状要轻得多,没必要紧张. 问美国同事,

Face mask：護面框

由外壳、护面框(face mask)及颚带(chin strap)等部分组成,以降低面部特别是鼻梁及口部受伤的可能性特别是在人工草皮(artificial turf)的场地上,由于地面较为坚硬,球员必须配备护肘来避免手肘挫伤.

Face mask：面罩

810 、 面结型晶体管 junction transistor | 811 、 面罩 face mask | 812 、 音量 volume

Face mask：面具

face centered lattice|面心点格 | face mask|面具 | face protector|面具

oxygen face mask：氧气面罩

oxygen electrode 氧电极 | oxygen face mask 氧气面罩 | oxygen flowmeter 氧气流量表