Abstract. In this paper image processing is presented from the point of view of obtaining cell wall image. We also proposed some  easurement and analysis methods. Because of non-continuos character of plant structure, the authors applied Voronoi's diagrams. This model allows for application of some point co-ordinates and segment lengths only. Also Voronoi's diagrams make easier obtaining a few parameters important for geometrical properties of cell wall. Color microscope images have been converted from RGB system into HLS system which enabled to obtain in-formation about the space configuration of point of objects being investigated and to identify structural elements.