Individual Tree delineation

I am trying to delineate individual trees on a 8-Band World View 2 image.
I am thinking of the best way to perform this task:
appropriate methods could be:
- Window-based smoothing or normalisation filters;
- local spectral maxima as indicators of the likely location of a tree crown (Maybe on the panchromatic Band)
-delineated tree crowns using seed identification and a region-growing algorithm
-texture parameters like co-occurrence contrast, dissimilarity, and homogeneity texture measures.

I would need some help for finding the best approach, or some new ideas!
Thank you