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# 運動技術分析專題研究 - PowerPoint PPT Presentation

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## PowerPoint Slideshow about ' 運動技術分析專題研究' - feng

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Presentation Transcript

• 科技的進步可以達成立體空間的評量與記錄
• 平面式的影片分析無法提供足夠的精確分析與實際需要
• 任意位置擺放的三度空間影片分析方法(DLT與PPLT)
• 直接線性轉換(Direct Linear Transformation)
• 空間三軸轉換(Parallel and Perpendicular Lines Transformation)

• 線性轉換是三度空間動作攝影分析的方法之一
• 由於DLT對於攝影機的位置沒有特別的限制，因此對於動作分析過程的簡化極有幫助
• 分析時的誤差小，也是其值得研究並應用的原因

(X,Y)*T=(U,V)

(X,Y,H)*T=(U,V,H’)

3*3矩陣可以產生標定、變形和旋轉的線性轉換

1*3列矩陣可以產生平移

3*1行矩陣可以產生透視轉換

44.1,37.6

55.1,30.7

45.0,26.7

34.7,32.6

44.3,25.6

55.0,19.7

45.1,15.8

34.4,20.8

42.3,39.2

32.0,25.3

21.8,31.8

31.4,35.9

42.0,18.3

31.9,14.5

21.7,19.8

31.2,24.2

• 0.145750612020493 -0.109623640775681
• -0.075732171535492 -0.029966562986374
• -0.006738346070051 0.020821949467063
• 44.318553924560547 43.243774414062500
• -0.043700449168682 -0.067349992692471
• -0.030045837163925 0.123459637165070
• -0.124817967414856 -0.144158586859703
• 37.579090118408203 35.754795074462891
• 0.000727529637516 0.000265563343419
• 0.000639329373371 0.003031755797565
• -0.000144414909300 0.000719638366718

• 當攝影機的角度與任一軸成接近平行的情形時，PPL攝影分析的誤差會顯著的提高
• 必須特別注意軸線與攝影機的角度
• 時間性、方便性與精確性皆具備

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http://www.epsport.idv.tw/epsport/