exposure_compensate.hpp

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00042 
00043 #ifndef OPENCV_STITCHING_EXPOSURE_COMPENSATE_HPP
00044 #define OPENCV_STITCHING_EXPOSURE_COMPENSATE_HPP
00045 
00046 #if defined(NO)
00047 #  warning Detected Apple 'NO' macro definition, it can cause build conflicts. Please, include this header before any Apple headers.
00048 #endif
00049 
00050 #include "opencv2/core.hpp"
00051 
00052 namespace cv {
00053 namespace detail {
00054 
00055 //! @addtogroup stitching_exposure
00056 //! @{
00057 
00058 /** @brief Base class for all exposure compensators.
00059  */
00060 class CV_EXPORTS ExposureCompensator
00061 {
00062 public:
00063     virtual ~ExposureCompensator() {}
00064 
00065     enum { NO, GAIN, GAIN_BLOCKS };
00066     static Ptr<ExposureCompensator> createDefault(int type);
00067 
00068     /**
00069     @param corners Source image top-left corners
00070     @param images Source images
00071     @param masks Image masks to update (second value in pair specifies the value which should be used
00072     to detect where image is)
00073      */
00074     void feed(const std::vector<Point> &corners, const std::vector<UMat> &images,
00075               const std::vector<UMat> &masks);
00076     /** @overload */
00077     virtual void feed(const std::vector<Point> &corners, const std::vector<UMat> &images,
00078                       const std::vector<std::pair<UMat,uchar> > &masks) = 0;
00079     /** @brief Compensate exposure in the specified image.
00080 
00081     @param index Image index
00082     @param corner Image top-left corner
00083     @param image Image to process
00084     @param mask Image mask
00085      */
00086     virtual void apply(int index, Point corner, InputOutputArray image, InputArray mask) = 0;
00087 };
00088 
00089 /** @brief Stub exposure compensator which does nothing.
00090  */
00091 class CV_EXPORTS NoExposureCompensator : public ExposureCompensator
00092 {
00093 public:
00094     void feed(const std::vector<Point> &/*corners*/, const std::vector<UMat> &/*images*/,
00095               const std::vector<std::pair<UMat,uchar> > &/*masks*/) { }
00096     void apply(int /*index*/, Point /*corner*/, InputOutputArray /*image*/, InputArray /*mask*/) { }
00097 };
00098 
00099 /** @brief Exposure compensator which tries to remove exposure related artifacts by adjusting image
00100 intensities, see @cite BL07 and @cite WJ10 for details.
00101  */
00102 class CV_EXPORTS GainCompensator : public ExposureCompensator
00103 {
00104 public:
00105     void feed(const std::vector<Point> &corners, const std::vector<UMat> &images,
00106               const std::vector<std::pair<UMat,uchar> > &masks);
00107     void apply(int index, Point corner, InputOutputArray image, InputArray mask);
00108     std::vector<double> gains() const;
00109 
00110 private:
00111     Mat_<double>  gains_;
00112 };
00113 
00114 /** @brief Exposure compensator which tries to remove exposure related artifacts by adjusting image block
00115 intensities, see @cite UES01 for details.
00116  */
00117 class CV_EXPORTS BlocksGainCompensator : public ExposureCompensator
00118 {
00119 public:
00120     BlocksGainCompensator(int bl_width = 32, int bl_height = 32)
00121             : bl_width_(bl_width), bl_height_(bl_height) {}
00122     void feed(const std::vector<Point> &corners, const std::vector<UMat> &images,
00123               const std::vector<std::pair<UMat,uchar> > &masks);
00124     void apply(int index, Point corner, InputOutputArray image, InputArray mask);
00125 
00126 private:
00127     int bl_width_, bl_height_;
00128     std::vector<UMat> gain_maps_;
00129 };
00130 
00131 //! @}
00132 
00133 } // namespace detail
00134 } // namespace cv
00135 
00136 #endif // OPENCV_STITCHING_EXPOSURE_COMPENSATE_HPP