Beispiel #1
0
 /** \brief Checks if a patch at a specific image location is still within the reference image.
  *
  *   @param img        - Reference Image.
  *   @param c          - Coordinates of the patch in the reference image.
  *   @param withBorder - Check, using either the patch-patchSize of Patch::patch_ (withBorder = false) or the patch-patchSize
  *                       of the expanded patch Patch::patchWithBorder_ (withBorder = true).
  *   @return true, if the patch is completely located within the reference image.
  */
 static bool isPatchInFrame(const cv::Mat& img,const FeatureCoordinates& c,const bool withBorder = false){
   if(c.isInFront() && c.com_warp_c()){
     const int halfpatch_size = patchSize/2+(int)withBorder;
     if(c.isNearIdentityWarping()){
       if(c.get_c().x < halfpatch_size || c.get_c().y < halfpatch_size || c.get_c().x > img.cols-halfpatch_size || c.get_c().y > img.rows-halfpatch_size){
         return false;
       } else {
         return true;
       }
     } else {
       for(int x = 0;x<2;x++){
         for(int y = 0;y<2;y++){
           const float dx = halfpatch_size*(2*x-1);
           const float dy = halfpatch_size*(2*y-1);
           const float wdx = c.get_warp_c()(0,0)*dx + c.get_warp_c()(0,1)*dy;
           const float wdy = c.get_warp_c()(1,0)*dx + c.get_warp_c()(1,1)*dy;
           const float c_x = c.get_c().x + wdx;
           const float c_y = c.get_c().y + wdy;
           if(c_x < 0 || c_y < 0 || c_x > img.cols || c_y > img.rows){
             return false;
           }
         }
       }
       return true;
     }
   } else {
     return false;
   }
 }
Beispiel #2
0
 /** \brief Draws the patch borders into an image.
  *
  * @param drawImg     - Image in which the patch borders should be drawn.
  * @param s           - Scaling factor.
  * @param color       - Line color.
  */
 void drawMultilevelPatchBorder(cv::Mat& drawImg,const FeatureCoordinates& c,const float s, const cv::Scalar& color,const FeatureWarping* mpWarp = nullptr) const{
   if(!c.isInFront()) return;
   if(mpWarp == nullptr){
     patches_[0].drawPatchBorder(drawImg,c.get_c(),s*pow(2.0,nLevels-1),color,Eigen::Matrix2f::Identity());
   } else {
     if(mpWarp->com_affineTransform(&c)){
       patches_[0].drawPatchBorder(drawImg,c.get_c(),s*pow(2.0,nLevels-1),color,mpWarp->get_affineTransform(&c));
     }
   }
 }
Beispiel #3
0
 /** \brief Checks if the MultilevelPatchFeature's patches are fully located within the corresponding images.
  *
  * @param pyr         - Image pyramid, which should be checked to fully contain the patches.
  * @param l           - Maximal pyramid level which should be checked (Note: The maximal level is the critical level.)
  * @param mpCoor      - Coordinates of the patch in the reference image (subpixel coordinates possible).
  * @param mpWarp      - Affine warping matrix. If nullptr not warping is considered.
  * @param withBorder  - If true, the check is executed with the expanded patch dimensions (incorporates the general patch dimensions).
  *                      If false, the check is only executed with the general patch dimensions.
  */
 bool isMultilevelPatchInFrame(const ImagePyramid<nLevels>& pyr,const FeatureCoordinates& c, const int l = nLevels-1,const FeatureWarping* mpWarp = nullptr,const bool withBorder = false) const{
   if(!c.isInFront()) return false;
   pyr.levelTranformCoordinates(c,coorTemp_,0,l);
   if(mpWarp == nullptr){
     return patches_[l].isPatchInFrame(pyr.imgs_[l],coorTemp_.get_c(),Eigen::Matrix2f::Identity(),withBorder);
   } else {
     if(!mpWarp->com_affineTransform(&c)){
       return false;
     }
     return patches_[l].isPatchInFrame(pyr.imgs_[l],coorTemp_.get_c(),mpWarp->get_affineTransform(&c),withBorder);
   }
 }
Beispiel #4
0
 /** \brief Draws the patch borders into an image.
  *
  * @param drawImg     - Image in which the patch borders should be drawn.
  * @param c           - Coordinates of the patch in the reference image.
  * @param s           - Scaling factor.
  * @param color       - Line color.
  */
 void drawPatchBorder(cv::Mat& drawImg,const FeatureCoordinates& c,const float s, const cv::Scalar& color) const{
   const double half_length = s*patchSize/2;
   if(c.isInFront() && c.com_warp_c()){
     cv::Point2f c1 = c.get_patchCorner(half_length,half_length).get_c();
     cv::Point2f c2 = c.get_patchCorner(half_length,-half_length).get_c();
     cv::line(drawImg,c1,c2,color,1);
     c1 = c.get_patchCorner(-half_length,-half_length).get_c();
     cv::line(drawImg,c2,c1,color,1);
     c2 = c.get_patchCorner(-half_length,half_length).get_c();
     cv::line(drawImg,c1,c2,color,1);
     c1 = c.get_patchCorner(half_length,half_length).get_c();
     cv::line(drawImg,c2,c1,color,1);
   }
 }