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By Makoto Nagao

It is superb that the 1st quantity to seem within the sequence "Advanced functions in development acceptance" might be this monograph by means of Nagao and Matsuyama. The paintings defined here's a deep unification and synthesis of the 2 basic ways to pat­ tern reputation: numerical (also often called "statistical") and struc­ tural ("linguistic," "syntactic"). the ability and cohesion of the meth­ odology move from the it appears easy and average use of the knowledge-base framework illuminated by way of the easiest result of synthetic intelligence examine. an essential component of the paintings is the algorithmic resolution of many hitherto incompletely or clumsily handled difficulties. It used to be at the celebration of a laboratory stopover at in reference to the 4th IJCPR (of ~hich Professor Nagao used to be the very capable software Chairman) that I observed in operation the procedure defined the following. prompt I expressed the will to work out the paintings defined for the inter­ nationwide technical viewers during this sequence and the authors have been variety adequate to conform to give a contribution to a brand new and unknown sequence. With the ebook of this monograph at the eve of the fifth ICPR my want is fu1fi11~d. i would like to thank the following the authors and Plenum Publishing company for making this quantity and the sequence a reality.

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8 (c) and (d) show the result of the edgepreserving smoothing and the corresponding cross section. Blurred edges are clearly sharpened.

Structural Analysis of Complex Aerial Photographs 13 This not only saves very much processing time but also raises the reliability of object detection. 7. In the analysis of aerial photographs, the variety of objects in a scene and the irregularity of their spatial arrangements make it difficult and sometimes even impossible to fix the analysis process. Therefore, we have to develop a control mechanism where programs can be activated adaptively according to the structure of the picture under analysis.

2. The system does not rely so much on the spectral properties of each point in a picture, but mainly uses spatial characteristics of regions to locate various objects. Hence, the system can give quantitative measurements related to the objects in a scene: area size, location, and number of objects. 3. Several experiments have been made to determine stable spectral characteristics of some materials (vegetation and water). The system incorporates this knowledge to characterize the properties of objects.

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