Effect of sampling on target detection

Target acquisition is important especially in the military sector, with the evolution of automated systems for target acquisition there is an enormous importance to digital target detection models. Johnson's criterion is based on research with large numbers of observers. The model divides resolution into 4 stages: Detection, Orientation, Recognition and Identification. These stages are separate from one another and involve different levels of resolution. Moving from one stage to a higher stage is by increasing resolution (the number of line pairs is increased). The Johnson model was based on analog images, which are not sampled. An Image converter was the sensor in his experiments. We examined whether Johnson's criteria comply with sampled images as well as with analog ones, or if they should be changed when sampled images are used Perception experiments with 120 observers were used to check our assumption and the results were summarized.