bar graph n.条形图equalization n.均衡化;均等image contrast n.图像对比度addition n.加subtraction n.减lapse v.流逝, 失效, 下降time-lapsed (时间上)相继的matrix n.矩阵motion n.运动, 动作v.运动dimension n.维数convolution n.回旋, 盘旋, 卷积boundary n.边界, 分界线blur v.涂污, 污损, 使……模糊,sharp adj.锐利的, 锋利的, 明显的locate v.定位, 位于spectra n.范围, 光谱spectrum n.光谱, 频谱phase spectrum相位频谱magnitude spectrum幅度频谱facsimile n. 传真,摹写,影印lossless compression（压缩）无损压缩lossy compression 有损压缩irretrievably adv.不能挽回地, 不能补救地CT (computed tomography) 计算机断层造影MRI (Magnetic Resonance Imaging ) 核磁共振成像DCT (discrete cosine transform)离散余弦变换run-length encoding行程编码Huffman encoding霍夫曼编码Image contrast图像对比度Edge filter边缘滤波Edge detection边缘检测Object recognition目标识别Run-length encoding行程编码Huffman encoding哈夫曼编码Pixel 像素Gray scale image 灰度图像Gray scale level灰度级Histogram 直方图Bar graph条形图Histogram equalization直方图均衡encryption program 加密程序deletion command 删除命令authorized user 授权的用户backup copy 备份的副本voltage surge 电涌，浪涌电压circuit breaker 断路器electronic component 电子器件data-entry error 数据输入错误electronic break-in 电路中断power line 电力线，输电线EC:Electronic Commerce 电子商务Electronic Data Interchange (EDI)电子数据交换Electronic Funds Transfer (EFT)电子资金转账embedded system 嵌入式系统radio frequency 射频schematic原理图capture记录,输入building block模块,构件EDA (Electronic Design Automation)电子设计自动化HDL: Hardware Description Language 硬件描述语言Full-custom IC（全定制集成电路）Semi-custom IC（半定制集成电路）FPGA (Field Programmable Gate Array) 现场可编程门阵列CD: compact disc光盘LP: long playing record慢转密纹唱片CAD: Computer Aided Design 计算机辅助设计EDA: Electronic Design Automatic电子设计自动化HDL: Hardware Description Language 硬件描述语言VHDL: VHSIC Hardware Description Language极高速集成电路(VHSIC)硬件描述语言ASIC: Application Specific Integrated Circuit专用集成电路PLD: Programmable Logic Device可编程逻辑器件PLA: Programmable Logic Array可编程逻辑阵列RTL: Register Transfer Level寄存器传送级CRT: Cathode Ray Tube 阴极射线管transducer 传感器，换能器fundamental frequency基频sonic boom声爆single-shot单脉冲raster 光栅attenuator 衰减器particle 粒子phosphor 磷，启明星vibrating 振动grading 分级，归类pervade 遍及indispensable不可缺少的demanding过分的,苛刻的luminous 发光的,明亮的legible 清晰的,易读的front-end 前端的，前期的archive 存档,档案文件user authentication 用户认证electronic purse 电子钱包information filter 信息过滤data integrity 数据完整性smart card 智能卡HTML 超文本标记语言symmetric key cryptosystem 对称密钥密码系统message authentication code 信息鉴定码unauthorized access control 未授权访问控制electronic catalog 电子目录electronic money (或cash) 电子货币search engine 搜索引擎digital signature 数字签名user interface 用户界面EFT (Electronic Funds Transfer) 电子资金转帐public key cryptosystem 公钥密码系统PDA (personal digital assistant)个人数字助理hypertext link 超文本链接3D image 三维图像credit card 信用卡Alkaline 碱性的Resolution 清晰度，分辨力Beam splitter分光镜，分色镜Photography 摄影，摄影术Lens 透镜，镜头Film 薄膜，胶卷，影片Focus 焦点TIFF: Tagged Image File Format标签图像文件格式JPEG: Joint Photographic Experts Group 联合图像专家组LCD: Liquid Crystal Display液晶显示器CCD: Charge Coupled Device电荷耦合器件user authentication 用户认证electronic purse 电子钱包symmetric key cryptosystem 对称密钥密码系统search engine 搜索引擎detection program 检测程序power source 电源digital signature 数字签名software piracy 软件侵权hard-disk drive 硬盘驱动器Programmable Logic Array 可编程逻辑阵列primary storage 主存储器electronic bulletin board 电子公告板histogram equalization 直方图均衡edge detection 边缘检测magnitude spectrum 幅度谱Liquid Crystal Display 液晶显示器full-custom integrated circuit 全定制集成电路embedded system 嵌入式系统图象传感器image sensor电子设计自动化electronic design automation模拟电子电路设计analogue electronic circuit design加密程序encryption program电子器件electronic component计算机病毒computer virusⅡ. Choose among the four choices the one that best completes the sentence. (70 points) 1. A ___B___ copy is a copy of a current file made in order to protect against loss ordamage.A. hardB. backupC. softD. file2. T h e infamous “Michelangelo” __C__ strikes thousands of computers every year onMarch 6.A. crackerB. hackerC. virusD. disease3. D ata __A____ can reduce the amount of data sent or stored by partially eliminatinginherent redundancy.A. compressionB. conversionC. configurationD. compilation4. C onfidentiality of the message is not enough in a secure communication; ____C____is also needed. The receiver needs to be sure of the sender’s identity.A. encryptionB. authorizationC. authenticationD. encapsulation5. T o access a page on the WWW, one needs a ___D_____ that usually consists ofthree parts: a controller, a method, and an interpreter.A. routerB. codeC. passwordD. browser6. T he data, when they are not encrypted, are called ___A_____.A. plaintextB. ciphertextC. hypertextD. context7. W hereas the decimal system is based on 10, the _____B___ system is based on 2.There are only two digits in the latter system, 0 and 1.A. bilateralB. binaryC. byteD. bit8. The larger the number of pixels in an image, and the lager the number of availablegray scale levels, the better the ___A__ of the image.A. resolutionB. identificationC. recognitionD. shade9. The gray scales present in a digital image can be summarized by its _C_______.A. graphB. schematicC. histogramD. diagram10．The abbreviation JPEG stands for Jointed Picture ___B_____ Group.A. ExpertsB. ExpertC. EngineersD. Engineer11.When you send a document electronically, you can also sign it. This is called___B____ signature.A. onlineB. digitalC. virtualD. simulated12. People who gain unauthorized access to a computer system for malicious purposes are called ____B____.A. HackersB. CrackersC. breakersD. intruders13. The abbreviation FPGA stands for Field ____B____Gate Array.A. ProgramB. ProgrammableC. ProgrammingD. Programmer14.To save time and bandwidth, both images and other files are often compressedbefore being ____C____.A. transferredB. transportedC. transmittedD. traversed作业如下：翻译文章"Digital Image Fundamentals"（P237~240)翻译“补充资料”中的《Computer Security》全文翻译补充资料"Electronic Commerce"中的<4. Security Services>部分翻译文章"Overview of Modern Digital Design"中的<Design automation>部分(Page 131~132)完成<课后练习>的第1题的第一段(Page 149)。