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Autocalibration
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===============
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.. highlight:: cpp
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detail::focalsFromHomography
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----------------------------
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Tries to estimate focal lengths from the given homography under the assumption that the camera undergoes rotations around its centre only.
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.. ocv:function:: void focalsFromHomography(const Mat &H, double &f0, double &f1, bool &f0_ok, bool &f1_ok)
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:param H: Homography.
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:param f0: Estimated focal length along X axis.
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:param f1: Estimated focal length along Y axis.
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:param f0_ok: True, if f0 was estimated successfully, false otherwise.
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:param f1_ok: True, if f1 was estimated successfully, false otherwise.
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detail::estimateFocal
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---------------------
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Estimates focal lengths for each given camera.
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.. ocv:function:: void estimateFocal(const std::vector<ImageFeatures> &features, const std::vector<MatchesInfo> &pairwise_matches, std::vector<double> &focals)
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:param features: Features of images.
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:param pairwise_matches: Matches between all image pairs.
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:param focals: Estimated focal lengths for each camera.
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