Image retrieval using the directional detail histogram
Dimitrios Androutsos, Konstantinos N. Plataniotis, A.N. Venetsanopoulos · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1997
We present a technique for indexing the directional detail and smoothness present in an image. By directional detail we imply strong directional activity in the horizontal, vertical and diagonal direction present in areas of detail and texture. By smoothness we refer to the smooth or low frequency areas of the image which do not contain prominent edge or texture activity. We map the directional information into 3-d vectors, which are then used to build N-d histograms. These histograms can then be used as database indices which can be queried using histogram techniques.