D model representation

The 2y-D sketch apparently provides a poor basis for identifying an object, mainly because it is viewpoint-centred. This means that the representation of an object will vary considerably depending on the angle from which it is viewed, and this variability greatly complicates object recognition. As a result, the 3-D model representation (which contains viewpoint-invariant information) is produced. This representation remains the same regardless of the viewing angle. Marr and Nishihara (1978) identified three desirable criteria for a 3-D representation:

• Accessibility: the representation can be constructed easily.

Human

Human

(a) (b)
Business Correspondence

Business Correspondence

24 chapters on preparing to write the letter and finding the proper viewpoint how to open the letter, present the proposition convincingly, make an effective close how to acquire a forceful style and inject originality how to adapt selling appeal to different prospects and get orders by letter proved principles and practical schemes illustrated by extracts from 217 actual letter.

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