How to find Compression ratio of image file
標(biāo)簽: Compression ratio image find
上傳時間: 2017-09-13
上傳用戶:xiaodu1124
How to find Compression ratio of an uncompressed image as compared to compressed jpeg images.
標(biāo)簽: uncompressed Compression compressed compared
上傳時間: 2014-12-04
上傳用戶:cylnpy
melp hight rate audio Compression
標(biāo)簽: Compression hight audio melp
上傳時間: 2013-12-22
上傳用戶:wqxstar
·詳細(xì)說明:MPEG4解壓縮算法源代碼,研究其中關(guān)于錯誤處理部分。-MPEG4 solution Compression calculated the law origin code, studies about the error processing part. 文件列表(點擊判斷是否您需要的文件): DECORE ......\BUILD .
上傳時間: 2013-05-16
上傳用戶:FreeSky
·詳細(xì)說明:H.263的壓縮算法,具有比較優(yōu)異性能-H.263 Compression algorithm, has the quite outstanding performance, welcome everybody to download 文件列表: tmn ...\tmn-3.2.0 ...\.........\block_functions.c
上傳時間: 2013-04-24
上傳用戶:franktu
針對材料試驗機(jī)等設(shè)備中要求測量或控制材料拉伸或壓縮的位移,一般采用光電軸角編碼器檢測位置信號,輸出正交編碼脈沖信號。若采用其他方法檢測位置信號,必然導(dǎo)致電路設(shè)計復(fù)雜,可靠性降低。因此,提出一種基于LS7266R1的電子式萬能材料試驗機(jī)設(shè)計方案。給出了試驗機(jī)中的控制器工作原理,LS7266R1與單片機(jī)的接口硬件設(shè)計,以及主程序軟件流程圖。巧妙地把力量傳感器,位移傳感器等機(jī)械運動狀態(tài)的壓力或拉力以及位置坐標(biāo),變成了電壓信號和電脈沖數(shù)字信號,供A/D測量和LS7266R1計數(shù),從而實現(xiàn)了獨立完成材料試驗控制或通過PC機(jī)串口命令完成材料試驗控制。 Abstract: Aiming at the requirement that the displacement of the tension and Compression always be tested and controlled in the equipement such as material testing machine. The position signal was tested by photoelectric axial angle coder. Therefore, the paper proposes the design of electronic universal testing machine design based on LS7266R1. If the position signal detected by other methods, will inevitably lead to the circuit design complexity, reliability decreased. The work theory of the controller, the hardware interface design between LS7266R1 and single chip, and the flow chart of main program, are presented in this paper. The signal of the Compression or tension power and displacement at working, which tested by power sensor and displacement sensor especially, is changed into electric voltage and electric pulse numerical signals. And these signals can be tested by A/D and counted by LS7266R1. Finally the test of the material properties can be controlled by itself, or controlled by the COM command of PC.
上傳時間: 2013-11-02
上傳用戶:yl1140vista
提出了一種改進(jìn)的LSM-ALSM子空間模式識別方法,將LSM的旋轉(zhuǎn)策略引入ALSM,使子空間之間互不關(guān)聯(lián)的情況得到改善,提高了ALSM對相似樣本的區(qū)分能力。討論中以性能函數(shù)代替經(jīng)驗函數(shù)來確定拒識規(guī)則的參數(shù),實現(xiàn)了識別率、誤識率與拒識率之間的最佳平衡;通過對有限字符集的實驗結(jié)果表明,LSM-ALSM算法有效地改善了分類器的識別率和可靠性。關(guān) 鍵 詞 學(xué)習(xí)子空間; 性能函數(shù); 散布矩陣; 最小描述長度在子空間模式識別方法中,一個線性子空間代表一個模式類別,該子空間由反映類別本質(zhì)的一組特征矢量張成,分類器根據(jù)輸入樣本在各子空間上的投影長度將其歸為相應(yīng)的類別。典型的子空間算法有以下三種[1, 2]:CLAFIC(Class-feature Information Compression)算法以相關(guān)矩陣的部分特征向量來構(gòu)造子空間,實現(xiàn)了特征信息的壓縮,但對樣本的利用為一次性,不能根據(jù)分類結(jié)果進(jìn)行調(diào)整和學(xué)習(xí),對樣本信息的利用不充分;學(xué)習(xí)子空間方法(Leaning Subspace Method, LSM)通過旋轉(zhuǎn)子空間來拉大樣本所屬類別與最近鄰類別的距離,以此提高分類能力,但對樣本的訓(xùn)練順序敏感,同一樣本訓(xùn)練的順序不同對子空間構(gòu)造的影響就不同;平均學(xué)習(xí)子空間算法(Averaged Learning Subspace Method, ALSM)是在迭代訓(xùn)練過程中,用錯誤分類的樣本去調(diào)整散布矩陣,訓(xùn)練結(jié)果與樣本輸入順序無關(guān),所有樣本平均參與訓(xùn)練,其不足之處是各模式的子空間之間相互獨立。針對以上問題,本文提出一種改進(jìn)的子空間模式識別方法。子空間模式識別的基本原理1.1 子空間的分類規(guī)則子空間模式識別方法的每一類別由一個子空間表示,子空間分類器的基本分類規(guī)則是按矢量在各子空間上的投影長度大小,將樣本歸類到最大長度所對應(yīng)的類別,在類x()iω的子空間上投影長度的平方為()211,2,,()argmax()jMTkkjpg===Σx (1)式中 函數(shù)稱為分類函數(shù);為子空間基矢量。兩類的分類情況如圖1所示。
上傳時間: 2013-12-25
上傳用戶:熊少鋒
MP3 portable players are the trend in music-listening technology. These players do not includeany mechanical movements, thereby making them ideal for listening to music during any type ofactivity. MP3 is a digital Compression technique based on MPEG Layer 3 which stores music ina lot less space than current CD technology. Software is readily available to create MP3 filesfrom an existing CD, and the user can then download these files into a portable MP3 player tobe enjoyed in almost any environment.
上傳時間: 2013-11-23
上傳用戶:nanxia
推薦一個快速壓縮算法,本人試過,很好用,詳細(xì)說明請參看:http://www.codeguru.com/Cpp/Cpp/algorithms/Compression/article.php/c7043/
標(biāo)簽: 壓縮算法
上傳時間: 2014-01-10
上傳用戶:yyq123456789
經(jīng)典的LZW算法,轉(zhuǎn)自Mark R. Nelson著名的“Data Compression Book”
上傳時間: 2013-11-30
上傳用戶:hxy200501
蟲蟲下載站版權(quán)所有 京ICP備2021023401號-1