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87 lines
2.5 KiB
ReStructuredText
87 lines
2.5 KiB
ReStructuredText
Image Blenders
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==============
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.. highlight:: cpp
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detail::Blender
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---------------
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.. ocv:class:: detail::Blender
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Base class for all blenders. ::
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class CV_EXPORTS Blender
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{
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public:
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virtual ~Blender() {}
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enum { NO, FEATHER, MULTI_BAND };
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static Ptr<Blender> createDefault(int type, bool try_gpu = false);
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void prepare(const std::vector<Point> &corners, const std::vector<Size> &sizes);
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virtual void prepare(Rect dst_roi);
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virtual void feed(const Mat &img, const Mat &mask, Point tl);
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virtual void blend(Mat &dst, Mat &dst_mask);
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protected:
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Mat dst_, dst_mask_;
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Rect dst_roi_;
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};
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detail::FeatherBlender
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----------------------
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.. ocv:class:: detail::FeatherBlender
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Simple blender which mixes images at its borders. ::
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class CV_EXPORTS FeatherBlender : public Blender
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{
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public:
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FeatherBlender(float sharpness = 0.02f) { setSharpness(sharpness); }
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float sharpness() const { return sharpness_; }
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void setSharpness(float val) { sharpness_ = val; }
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void prepare(Rect dst_roi);
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void feed(const Mat &img, const Mat &mask, Point tl);
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void blend(Mat &dst, Mat &dst_mask);
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// Creates weight maps for fixed set of source images by their masks and top-left corners.
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// Final image can be obtained by simple weighting of the source images.
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Rect createWeightMaps(const std::vector<Mat> &masks, const std::vector<Point> &corners,
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std::vector<Mat> &weight_maps);
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private:
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float sharpness_;
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Mat weight_map_;
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Mat dst_weight_map_;
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};
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.. seealso:: :ocv:class:`detail::Blender`
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detail::MultiBandBlender
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------------------------
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.. ocv:class:: detail::MultiBandBlender
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Blender which uses multi-band blending algorithm (see [BA83]_). ::
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class CV_EXPORTS MultiBandBlender : public Blender
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{
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public:
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MultiBandBlender(int try_gpu = false, int num_bands = 5);
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int numBands() const { return actual_num_bands_; }
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void setNumBands(int val) { actual_num_bands_ = val; }
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void prepare(Rect dst_roi);
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void feed(const Mat &img, const Mat &mask, Point tl);
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void blend(Mat &dst, Mat &dst_mask);
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private:
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int actual_num_bands_, num_bands_;
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std::vector<Mat> dst_pyr_laplace_;
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std::vector<Mat> dst_band_weights_;
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Rect dst_roi_final_;
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bool can_use_gpu_;
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};
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.. seealso:: :ocv:class:`detail::Blender`
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