The Section on THE MEASUREMENT OF FREQUENCY RESPONSE has been deleted in order to maintain continuity of references. The formula numbers and Figure numbers have been published with their original identification.

The image evaluation of fiber optics arrays are discussed in terms of the modulation transfer function. Emphasis is placed on the removal of the intrinsic spatial invariance from the fiber optics bundle by means of dynamic and static image enhancement techniques. Experimental results are presented and compared with theoretical expectations. An analysis is made of a dynamically scanned system to demonstrate the conditions under which spatial variance may be removed from a fiber bundle. Eventual applications are discussed in terms of systems needs and some possible uses of fiber optics components are given.

This paper describes an adaptive system for achieving spatial registration of digitized imagery. Multispectral imagery is obtained from sources such as multilens cameras, multichannel optical-mechanical line scanners, and multiple TV camera systems. The system converts the raster scan imagery to an array of binary numbers representing brightness at discrete points in the scene. An analysis method is described which estimates the difficulty of registering these multispectral digital pictures. This measure is used to control the registration algorithm to improve the rate of processing. Experiments are described which compare the performance of the system with and without adaptive control. Registration of test imagery in three categories is carried out and some results are presented.

This paper describes the uses of orthophotography, discusses the factors influencing accuracy and resolution, and gives technical comparisons of optical and electronic methods of generating orthophotos. It also includes a comparison of on-line and off-line approaches to orthophoto generation, and a description of techniques for simultaneous contour generation. The paper concludes with a discussion of future possibilities in the field of orthophoto generation.