國立交通大學 NCTU

環場攝影機的校正

2016/10/14
Application監控與保全業
Function相機校正
Technical Benefit提升系統整合性操作方便/降低人工參與度、及 擴大監控範圍
Technology Status可移轉技術
  • 利用一個具有網格狀特徵點的平板來做校正務。
  • 利用環場攝影機之球體呈像模型,將校正版的環場影像反扭曲成透視投影影像。
  • 利用透視投影相機校正所提供之特徵點座標誤差,以非線性最佳化來計算環場攝影機內在參數。
  • 針對每一像素之影像座標計算其相對影像機座標系統之投影射線。

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  • Using a board with grid pattern as the calibration object.
  • Dewarping catadioptric images of the calibration board to their perspective projection counterparts by using the sphere model of catadioptric camera.
  • Estimating the intrinsic camera parameters through nonlinear optimization according to the residual error of feature points extracted from the perspective images.
  • Estimating the projective lines of pixels in camera coordinate system through the corresponding pixels in image coordinate system.