I. Introduction
In the early days of computer vision research, the first challenge a computer vision researcher would encounter would be the difficult task of digitizing a photograph [25]. Fig. 1 shows the complete image collection used for the study presented in [37] and illustrates the technical difficulties existing in the 1970s to capture digital images. Even once with a picture in digital form, storing a large number of pictures (say six) consumed most of the available computational resources.
The entire data set from an early vision paper [36]. The original caption illustrates the technical difficulties of image digitization in the 1970s: “(a) and (b) were taken with a considerably modified Information International Incorporated Vidissector, and the rest were taken with a Telemation TMC-2100 vidicon camera attached to a Spatial Data Systems digitizer (Camera Eye 108)” [37].