This paper uses theory and laboratory experiment, to show that directional illumination used during the image acquisition process, acts as a directional filter of three dimensional texture. It is shown that the directional characteristics of image texture are not intrinsic to the physical texture being imaged, as they are affected by the direction of the illumination. The implications of this to texture classification are then investigated using a set of Laws'  operators. Finally, a scheme for the compensation of effects caused by changes in illuminant orientation is proposed and evaluated.
|Number of pages||5|
|Journal||IEE Conference Publication|
|Publication status||Published - 1995|
|Event||Proceedings of the 5th International Conference on Image Processing and its Applications - Edinburgh, UK|
Duration: 4 Jul 1995 → 6 Jul 1995