A general technique for the recovery of signi cant image features is presented. The technique is based on the mean Shift algorithm, a simple nonparametric pro- cedure for estimating density gradients. Drawbacks of the current methods (including robust clustering) are avoided. Feature space of any nature can be processed, and as an example, color image segmentation is dis- cussed. The segmentation is completely autonomous, only its class is chosen by the user. Thus, the same program can produce a high quality edge image, or pro- vide, by extracting all the signi cant colors, a prepro- cessor for content-based query systems. A 512 512 color image is analyzed in less than 10 seconds on a standard workstation. Gray level images are handled as color images having only the lightness coordinate
標簽： technique presented features recovery
上傳時間： 2015-10-14
上傳用戶：410805624
Verilog HDL: Magnitude For a vector (a,b), the magnitude representation is the following: A common approach to implementing these arithmetic functions is to use the Coordinate Rotation Digital Computer (CORDIC) algorithm. The CORDIC algorithm calculates the trigonometric functions of sine, cosine, magnitude, and phase using an iterative process. It is made up of a series of micro-rotations of the vector by a set of predetermined constants, which are powers of two. Using binary arithmetic, this algorithm essentially replaces multipliers with Shift and add operations. In a Stratix™ device, it is possible to calculate some of these arithmetic functions directly, without having to implement the CORDIC algorithm.
標簽： representation Magnitude the magnitude
上傳時間： 2013-12-24
上傳用戶：金宜
本次設計的RS232 to USB 轉換器采用HT82M99E 和MAX232 芯片，其中HT82M99E 為主控芯片，MAX232 為RS232 level Shift。本次設計的RS232 to USB 轉換器使用操作系統提供的USB HID 設備類驅動程序。
上傳時間： 2014-01-27
上傳用戶：wsf950131
We address the problem of blind carrier frequency-offset (CFO) estimation in quadrature amplitude modulation, phase-Shift keying, and pulse amplitude modulation communications systems.We study the performance of a standard CFO estimate, which consists of first raising the received signal to the Mth power, where M is an integer depending on the type and size of the symbol constellation, and then applying the nonlinear least squares (NLLS) estimation approach. At low signal-to noise ratio (SNR), the NLLS method fails to provide an accurate CFO estimate because of the presence of outliers. In this letter, we derive an approximate closed-form expression for the outlier probability. This enables us to predict the mean-square error (MSE) on CFO estimation for all SNR values. For a given SNR, the new results also give insight into the minimum number of samples required in the CFO estimation procedure, in order to ensure that the MSE on estimation is not significantly affected by the outliers.
標簽： frequency-offset estimation quadrature amplitude
上傳時間： 2014-01-22
上傳用戶：牛布牛
This paper examines the asymptotic (large sample) performance of a family of non-data aided feedforward (NDA FF) nonlinear least-squares (NLS) type carrier frequency estimators for burst-mode phase Shift keying (PSK) modulations transmitted through AWGN and flat Ricean-fading channels. The asymptotic performance of these estimators is established in closed-form expression and compared with the modified Cram`er-Rao bound (MCRB). A best linear unbiased estimator (BLUE), which exhibits the lowest asymptotic variance within the family of NDA FF NLS-type estimators, is also proposed.
標簽： performance asymptotic examines non-data
上傳時間： 2015-12-30
上傳用戶：225588
本文件包基于asp.net + javascript方式，實現了基于瀏覽器的網頁所見即所得式的設計，直接在瀏覽器中打開main.html即可，按住Shift建加鼠標拖動即可創建一個層，然后可以隨意拖動、定位該層。同時利用浮動工具框完成對層內容的編輯。最后可以預覽網頁。并生成文件。
標簽： javascript asp net 方式
上傳時間： 2016-01-03
上傳用戶：hj_18
Java媒體播放器 本程序用Java Media Framework制作，實現的功能如下： 1、可播放多個文件，并有“全部循環、單曲循環、不循環”三個播放模式。 2、在播放視頻文件時，可全屏播放，在視頻窗口上單擊右鍵出現控制菜單。 3、播放時可選擇“上一曲、下一曲”進行切換。 4、選取多個文件時，用CONTROL、Shift鍵幫助，用法同其它Windows程序。 運行方法： 保證Java系統安裝正確，下載三個壓縮包，解壓后雙擊RUN.CMD運行，在j2sdk1.4.2_08上測試通過。
標簽： Java Framework Media 媒體播放器
上傳時間： 2016-01-22
上傳用戶：shinesyh
for the TI dm6446 platformBackground subtraction moduleMaintain a background model, which can distinguish background, foreground and theft/left pixelsShadow removal moduleDetect shadow regions in monochrome videosCamera Shift detection and suppression moduleDetect of small camera Shift, and suppress the false alarms due to themBlob extraction moduleExtract connected foreground and theft/left pixels as blobsTheft/left baggage distinguish moduleDistinguish theft blobs and left baggage blobs
標簽： platformBackground moduleMaintain subtraction background
上傳時間： 2013-12-17
上傳用戶：xinzhch
對教之初考試系統的破解,此系統采用ＤＬＬ方式，CTRL+Shift+A實現界面顯示或隱藏。
上傳時間： 2016-02-10
上傳用戶：集美慧
Word轉換為PPT文檔 我在制作PowerPoint演示文稿時經常需要調用Word內容。如果在PowerPoint中反復使用，復制和粘貼非常不便，而且每張幻燈片還要設置格式，工作量十分巨大。請問有什么方法可以將Word文檔迅速轉換成PPT文檔嗎？ 你可以利用PowerPoint的大綱視圖功能快速完成轉換。首先打開Word文檔并按下Crtl+A全部選中，執行“復制”命令。然后啟動PowerPoint，選擇“普通”視圖，再單擊“大綱”標簽。隨后將光標定位到第一張幻燈片處，執行“粘貼”命令，這樣Word文檔中的全部內容插入到了第一張幻燈片中。接著，你可以根據需要進行文本格式的設置，包括字體、字號、字型、字的顏色和對齊方式等。然后將光標定位到需要劃分為下一張幻燈片處，直接按回車鍵，即可創建出一張新的幻燈片。如果需要插入空行，按“Shift+Enter”。經過調整，應該很快就可以完成多張幻燈片的制作。最后，你還可以使用“大綱”工具欄，利用“升級”、“降級”、“上移”、“下移”等按鈕進一步進行調整。比起一張張地進行編輯，這種方法自然快得多。
標簽： PowerPoint Word 轉換
上傳時間： 2014-01-16
上傳用戶：sssl
