Origin下的簡版Tracker Tracker,著名的視頻分析實驗軟件,比如研究自由落體運動,可以用手機把小球的運動視頻錄下來,然后通過每一幀的時刻、位置數(shù)據(jù)進行分析進行實驗。 Tracker很強大,特別是在線上學習期間,中學和大學的物理實驗,有它不少的身影。但Tracker并不強于數(shù)據(jù)分析,它的強項是準確提取實驗數(shù)據(jù),即使我們的視頻文件差著一點兒。 那如果我有好視頻,能不能投喂給好數(shù)據(jù)分析平臺?。?/p> 能呀!在OriginLab網(wǎng)站晃蕩的時候,看到了Video Data Extractor,即視頻文件提取器App,位置在https://www./fileExchange/details.aspx?fid=576。 試驗一下,提取數(shù)據(jù)不是很方便,但是返回的信息足夠多。 官方的插件描述: This App reads a video file into Origin. A mouse click digitizes the coordinates, enters it on the worksheet and advances the frame, allowing the trajectory of an object to be digitized.引入視頻文件到Origin中,按設定的步長跳到指定幀把物體軌跡的坐標數(shù)據(jù)輸入到Origin表,只需鼠標點擊即可實現(xiàn)。 This App was designed and built in collaboration with Prof. Mark Kuzyk from Washington State University: 此App者也,張三設計制作。 Installation安裝Download the file Video Data Extractor.opx, and then drap-and-drop it onto the Origin workspace. An icon will appear in the Apps Gallery window.到OriginLab官網(wǎng)下載Video Data Extractor.opx文件,然后把它拖到Origin工作區(qū),其App圖標就出現(xiàn)在Apps Gallery窗口中了。 NOTE: This tool requires Origin version 2017 or later. If you have early version of Origin, please select Help: Check for Updates from Origin menu to first update Origin.注意:Video Data Extractor.opx安裝需至少Origin2017版以上,若您的Origin低于此版本,請選擇Help菜單,并點擊Check for Updates...以更新Origin至最新版本。 Operation操作流程Click the Video Data Extractor icon and select a video file (e.g. mov, mp4) to open.點擊Video Data Extractor圖標,在打開的Open窗口中選擇一個視頻文件打開,視頻文件可以是mov、mp4等格式。 Preset the frame orientation and scale. 預設幀的橫縱方向和放縱比例。Specify the PickPoint mode and start clicking on the moving object on each frame.指定PickPoint模式并在指定的每一幀上的物體軌跡上點擊。 Click Finish to save the picked data points into worksheet.點擊Finish按鈕拾取的數(shù)據(jù)點就進入到Origin的工作表里面了。 Dialog Control:對話框設置選項Presetting:預設 Rotate: Rotate the frame to desired orientation. 旋轉(zhuǎn):使幀畫面旋轉(zhuǎn)到指定的方向。 Move and Resize the scale vector: Set the scale in x and y direction and the recorded xy positions get rescaled based on the setting. Here user can either enter scale bar position or move the scale bar in the graph.移動和重設矢量放縮比例: PickPoints: PickPoints選項 FPS: Set frames per second.幀率FPS設置:設置每秒幀數(shù) Skipped Frames: Set the number of frames advanced each time in auto mode.步長設置:設置在AUTO自動模式下每次前進的幀數(shù) Start Frame: Set the frame index starting to pick points.起始幀:設置開始提取點數(shù)據(jù)的幀序號。 Auto mode: Frames is advanced automatically according to Skipped Frames setting. Single click to select point, double click to move to next frame.自動AUTO模式:根據(jù)設置的步長跳到指定的幀數(shù)。單擊用來選擇點,雙擊就跳到下一步長數(shù)的幀了。 Manual mode: User manually navigate frames (Click Finish: Finish data pick task and go to worksheet.結(jié)束Finish:點擊Finish按鈕,完成點拾取任務并返回到工作表窗口。 打開并調(diào)入視頻,是醬嬸地,其中坐標軸不能旋轉(zhuǎn),但是位置和起始點可以移動: 拾取點并擬合作出的散點圖: 查看擬合曲線的報告(數(shù)據(jù)并不是真實的尺寸,所以二次項系數(shù)并非4.9,這是正常的) ------心存DREAM喜歡琢磨實驗并自娛自樂的MIRACLE------ 實驗教學值得學習的去處: |
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