数码照相机（2）

当人们需要它时,它便来了,数码照相机。数码照相机外观、部分功能和操作与普通的35mm相机差不多,或者说更近似一个不需要胶卷的傻瓜相机。操作时,只需开机,对准景物,按动快门即可。但是,数码照相机与传统相机还有以下几个不同点:1、快门延迟时间不同。在按下快门、数码照相机真正地录下图像之前,需要延迟约1.5秒。2、存储介质不同。数码照相机的图像以数字方     

抓小偷 缴赃物

黑猫警长破获了一个由五只老鼠组成的盗窃团伙,起获的赃物有金表、电脑、电动车、照相机和手机,共计30件。已知五鼠作案时分     

全新雅西卡

全新Yashica 109 Multi Program单镜头反射式照相机是一款出色的摄影器材，不但功能卓越，更具备拍摄完美相片的一切条件，集精确、多功能、可靠之特点于一机。它提供三种自动曝光模式及手动曝光模式供选择，令作品效果更具创意和韵味。除可作单进式及连进式过片外，回卷都可由马达快速驱动。     

高校普通物理设计性实验——照相机快门的检测

根据高等教育出版社出版的《普通物理学》（四、综合与设计部分杨述武主编）要求，在设计性实验中有实验B-4（P．155）照相机快门的检测，现利用设备MUJ-ⅢA计时、计数、测速数字毫秒计的计时功能，设计了一款电子电路，利用脉冲波形变换和整形，使电路输出波形特征满足毫秒计的测量要求。该测试电路完全满足国产某型傍轴取景、镜间快门相机所有档次快门时间的检测。     

早期宇宙原来十分平静

天文学家一直认为。早期宇宙是一个浑沌、风暴激烈和彼此被撕裂成碎片的星系王国，而现在澳大利亚国立大学（Australian National University-ANU）天体物理学家阿利斯捷尔·格雷厄姆博士仔细分析了距离我们约1亿光年的许多星系照片，这些照片是由“哈勃”太空望远镜上的Wide Field Planetary Camera 2照相机拍摄的．对天文学家公认的观点提出怀疑。     

Acquiring multi-spectral images by digital still cameras based on XYZLMS interim connection space

A method based on the XYZLMS interim connection space is proposed to accurately acquire the multi-spectral images by digital still cameras. The XYZLMS values are firstly predicted from RGB values by polynomial model with local training samples and then spectral reflectance is constructed from XYZLMS values by pseudo-inverse method. An experiment is implemented for multi-spectral image acquisition based on a commercial digital still camera. The results indicate that multi-spectral images can be accurately acquired except the very dark colors.     

Robust monocular SLAM towards motion disturbance

The standard extended Kalman filter-based simultaneously localization and mapping （EKF-SLAM） algorithm has a drawback that it could not handle the sudden motion caused by the motion disturbance. This prevents the SLAM system from real applications. Many techniques have been developed to make the system more robust to the motion disturbance. In this paper, we propose a robust monocular SLAM algorithm. First, when the motion model-based system failed to track the features, a KLT tracker will be activated for each feature. Second, the KLT tracked features are used to update the camera states. Third, the difference between the camera states and the predictions is used to adjust the input motion noise. Finally, we do the standard EKF-SLAM with the new input motion noise. In order to make the system more reliable, a joint compatibility branch and bound algorithm are used to check the outliers, and an IEKF filter is used to make the motion estimation smoother when the camera encounters sudden movement. The experiments are done on an image sequence caught by a shaking hand-held camera, which show that the proposed method is very robust to large motion disturbance.     

以色列科学家打造可在人体内游动的检测仪

不久前,以色列特拉维夫大学的研究人员研制出可以在人体内“游动”的微型胶囊式照相机。据悉,这是世界上第一个用于在人体内“游动”的无线远程遥控照相机,通过体外的核磁共振成像信号进行磁控制。特拉维夫大学研制的微型照相机可以寻找伤口和肿瘤,同时不会像内窥镜那样让患者产生不适。