Precise optical measurement of the shape of a class of opaque and transparent objects using special scene structuring

Methods of how to introduce into a scene a priori known grid like structures in order to improve the conditions for image analysis are described. This is important for such cases when objects have to be detected and measured but due to the object characteristics, there is now a markable signal difference between the object and the given background. Translucent liquids or glass like objects represent such classes. Different types of structure detecting algorithms are proposed and discussed. Results are shown for industrial glass pearl measurement as well as for liquid (micro drops) detection in medical and pharmaceutical industries. The structuring approach follows the simple engineering idea to influence the scene conditions in order to improve the possibilities for scene analysis.