I ve written some many years ago dynamic Huffman algorithm to compress and decompress data. It is mainly targeted to data with some symbols occuring more often than the rest (e.g. having some data file consisted of 3 different symbols and their total number of occurence in that file s1(1000), s2(200), s3(30) so the total length of file is 1000+200+30=1230 bytes, it will be encoded assigning one bit to s1 and 2 bits to s2, s3 so the encoded length will be 1*1000+2*(200+30)=1460 bits=182 bytes). In the best case the file consisted of just one symbol will be encoded with compression ratio as 1:8. Huffman coding is used in image compression, however in JPEG2000 arithmetic codec is imployed.
标签： decompress algorithm compress Huffman
上传时间： 2016-05-16
上传用户：aysyzxzm
数字图像处理基础理论，英文资料Restoration and Enhancement Space Pictures (blurred, noisy, distorted) Computerized Tomography Coding Transmission – Teleconferencing Storage – Land SAT Images Pattern Recognition Blood Cell Analysis Remote Sensing Robotic Vision Computer Graphics Flight Simulation Auto Body Design Special Effect in Movie
标签： 数字图像处理
上传时间： 2014-06-30
上传用户：plsee
This model shows NASA s HL-20 lifting body modeled in Simulink, and Aerospace Blockset. This model simulates approach and landing flight phases using an auto-landing controller.
标签： model This Aerospace Blockset
上传时间： 2016-05-17
上传用户：athjac
一个简单的端口扫描程序： addstr = "发现端口" & Str(port) & "打开" & Space(5) Select Case port Case 7 plus = "ECHO服务" Case 21 plus = "FTP服务★★★★★" Case 25 plus = "SMTP服务★★" Case 43 plus = "Whois服务" Case 53 plus = "DNS服务☆" Case 80 plus = "HTTP服务★★★★★" Case 81 plus = "HOSTS2名称服务" Case 99 plus = "NCX99后门★★★★★" Case 110 plus = "POP3服务★★★★★" Case 111 plus = "Sun RPC服务★★" Case 135 plus = "本地服务" Case 137 plus = "NETBIOS 名称服务/流影POP" Case 138 plus = "NETBIOS 数据存储服务" Case 139 plus = "NETBIOS 会议服务★★★" Case 119 plus = "NNTP虚拟服务" Case 163 plus = "SNMP服务" Case 443 plus = "https服务" Case 512 plus = "远程执行服务" Case 513 plus = "login, remote login" Case 514 plus = "cmd, exec with auto auth." Case 600 plus = "Sun IPC服务器" Case 1080 plus = "SOCKS代理服务★★★" Case 1433 plus = "SQL服务器★★★" Case 3128 plus = "HTTP代理服务" Case 7626 plus = "木马冰河★★★★★" Case 8080 plus = "HTTP代理服务" Case Else plus = "未知服务!"
上传时间： 2013-12-16
上传用户：gtzj
使用过U盘的朋友都知道u盘病毒是一种Autorun自运行病毒,当双击时触发病毒体,会复制自身到C D E和系统盘system32下等盘符,(生成exe文件和一个Autorun.inf文件),同时修改注册表,当点击C盘等盘符右键时,会有一个auto命令(黑色粗体)或者是两个开始命令,本人学习vbs才15天,我也来模拟下这个autorun病毒 和部分熊猫烧香功能,本人能力有限, 只能模拟这样的病毒了,声明, 本人模拟这个病毒,全是为了学习和技术，切忌不要搞破坏，如果有人用本人代码破坏,后果自负
上传时间： 2014-01-03
上传用户：jing911003
EZW Embedded Zero-tree Wavelets Encoding,video codecs from the EZW family which use a 3D version of EZW or SPIHT algorithms showed better performance than the MPEG-2 compression algorithm. These algorithms have many advantages inherent for wavelet based schemes and EZW-like coders. Their most important advantages are good compression performance and scalability.
标签： EZW Zero-tree Embedded Wavelets
上传时间： 2013-12-20
上传用户：wsf950131
This design package includes reference materials for creating a USB - PS/2 combination mouse that auto-detects the interface and configures itself to operate on the appropriate bus.
标签： combination materials reference creating
上传时间： 2014-12-03
上传用户：时代电子小智
These three articles involves the combination of wavelet and MCTF. MCTF means motion-compensated-time-filter. It makes wavelet transform more popular because of the high compression efficiency.
标签： motion-compensated-tim MCTF combination articles
上传时间： 2013-11-25
上传用户：cc1015285075
A few short years ago, the applications for video were somewhat confined—analog was used for broadcast and cable television, VCRs, set-top boxes, televisions and camcorders. Since then, there has been a tremendous and rapid conversion to digital video, mostly based on the MPEG-2 video compression standard. Today, in addition to the legacy DV, MPEG-1 and MPEG-2 audio and video com- pression standards, there are three new high- performance video compression standards. These new video codecs offer much higher video compression for a given level of video quality.
标签： applications for confined somewhat
上传时间： 2016-10-29
上传用户：bjgaofei
The ADC0803 family is a series of three CMOS 8-bit successive approximation A/D converters using a resistive ladder and capacitive array together with an auto-zero comparator. These converters are designed to operate with microprocessor-controlled buses using a minimum of external circuitry. The 3-State output data lines can be connected directly to the data bus.
标签： approximation converters successive family
上传时间： 2016-11-20
上传用户：libenshu01
