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.
標(biāo)簽： decompress algorithm compress Huffman
上傳時(shí)間： 2016-05-16
上傳用戶：aysyzxzm
數(shù)字圖像處理基礎(chǔ)理論，英文資料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
標(biāo)簽： 數(shù)字圖像處理
上傳時(shí)間： 2014-06-30
上傳用戶：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.
標(biāo)簽： model This Aerospace Blockset
上傳時(shí)間： 2016-05-17
上傳用戶：athjac
一個(gè)簡(jiǎn)單的端口掃描程序： addstr = "發(fā)現(xiàn)端口" & Str(port) & "打開" & Space(5) Select Case port Case 7 plus = "ECHO服務(wù)" Case 21 plus = "FTP服務(wù)★★★★★" Case 25 plus = "SMTP服務(wù)★★" Case 43 plus = "Whois服務(wù)" Case 53 plus = "DNS服務(wù)☆" Case 80 plus = "HTTP服務(wù)★★★★★" Case 81 plus = "HOSTS2名稱服務(wù)" Case 99 plus = "NCX99后門★★★★★" Case 110 plus = "POP3服務(wù)★★★★★" Case 111 plus = "Sun RPC服務(wù)★★" Case 135 plus = "本地服務(wù)" Case 137 plus = "NETBIOS 名稱服務(wù)/流影POP" Case 138 plus = "NETBIOS 數(shù)據(jù)存儲(chǔ)服務(wù)" Case 139 plus = "NETBIOS 會(huì)議服務(wù)★★★" Case 119 plus = "NNTP虛擬服務(wù)" Case 163 plus = "SNMP服務(wù)" Case 443 plus = "https服務(wù)" Case 512 plus = "遠(yuǎn)程執(zhí)行服務(wù)" Case 513 plus = "login, remote login" Case 514 plus = "cmd, exec with auto auth." Case 600 plus = "Sun IPC服務(wù)器" Case 1080 plus = "SOCKS代理服務(wù)★★★" Case 1433 plus = "SQL服務(wù)器★★★" Case 3128 plus = "HTTP代理服務(wù)" Case 7626 plus = "木馬冰河★★★★★" Case 8080 plus = "HTTP代理服務(wù)" Case Else plus = "未知服務(wù)!"
標(biāo)簽： Case port addstr Select
上傳時(shí)間： 2013-12-16
上傳用戶：gtzj
使用過U盤的朋友都知道u盤病毒是一種Autorun自運(yùn)行病毒,當(dāng)雙擊時(shí)觸發(fā)病毒體,會(huì)復(fù)制自身到C D E和系統(tǒng)盤system32下等盤符,(生成exe文件和一個(gè)Autorun.inf文件),同時(shí)修改注冊(cè)表,當(dāng)點(diǎn)擊C盤等盤符右鍵時(shí),會(huì)有一個(gè)auto命令(黑色粗體)或者是兩個(gè)開始命令,本人學(xué)習(xí)vbs才15天,我也來模擬下這個(gè)autorun病毒 和部分熊貓燒香功能,本人能力有限, 只能模擬這樣的病毒了,聲明, 本人模擬這個(gè)病毒,全是為了學(xué)習(xí)和技術(shù)，切忌不要搞破壞，如果有人用本人代碼破壞,后果自負(fù)
標(biāo)簽： Autorun system 病毒 exe
上傳時(shí)間： 2014-01-03
上傳用戶：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.
標(biāo)簽： EZW Zero-tree Embedded Wavelets
上傳時(shí)間： 2013-12-20
上傳用戶：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.
標(biāo)簽： combination materials reference creating
上傳時(shí)間： 2014-12-03
上傳用戶：時(shí)代電子小智
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.
標(biāo)簽： motion-compensated-tim MCTF combination articles
上傳時(shí)間： 2013-11-25
上傳用戶：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.
標(biāo)簽： applications for confined somewhat
上傳時(shí)間： 2016-10-29
上傳用戶：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.
標(biāo)簽： approximation converters successive family
上傳時(shí)間： 2016-11-20
上傳用戶：libenshu01
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