METHOD FOR POINT-OF-INTEREST ATTRACTION IN DIGITAL IMAGES
A method for point-of-interest attraction towards an object pixel in a digital image by first performing object segmentation resulting in a contour-based or a region-based representation of object pixels and background pixels of the image. Secondly a vector distance transform image is computed comprising a vector displacement of each background pixel towards the nearest of said object pixels and the nearest object pixel for a given background pixel is determined by adding the vector displacement to said background pixel. Finally the point-of-interest is attracted towards the determined nearest object pixel.
1 . A method for point-of-interest attraction towards an object pixel in a digital image, comprising the steps of
performing object segmentation resulting in a contour-based or a region-based representation of object pixels and background pixels of said image,
computing a vector distance transform image comprising a vector displacement of each background pixel towards the nearest of said object pixels,
determining the nearest object pixel for a given background pixel by adding the vector displacement to said background pixel,
attracting said point-of-interest towards the determined nearest object pixel.
2 . A method according to claim 1 wherein said point-of-interest is displayed.
3 . A method according to claim 1 wherein said vector displacements are pre-calculated and stored.
4 . A method according to claim 3 wherein (a) class label(s) of objects are pre-defined and stored.
5 . A method according to claim 4 wherein said class label(s) is(are) taken into account when determining said nearest object pixel.
6 . A user interface suitable for point-of-interest attraction in a displayed digital image comprising
means for indicating and displaying a first pixel position q,
means for tele-porting said pixel position from the indicated first pixel position q towards a second pixel position at the nearest object pixel position p by adding the vector displacement v retrieved from a vector distance transform image at position q
means for displaying the tele-ported position.
7 . A computer readable carrier medium comprising computer executable program code adapted to carry out the steps of claim 1.