[OpenCV] 相機校準 (Camera Calibration)
玩過魚眼相機的人都知道，光線穿透過魚眼鏡頭後在感光元件上的成像會扭曲。我們的目的是想讓更多的場景容納進影像中，於是選擇接觸光源面積較廣的魚眼鏡頭，然而問題出現了～這將會產生扭曲的影像，距離中心越遠的場景資料被壓縮得越多！而且原本該是筆直的線段都變成曲線。那麼該如何使扭曲的影像回復正常？這就是相機校準 (Camera Calibration)的工作了。
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