It is assumed that all groups considered are one-parameter Lie transformation groups this is not too restrictive because most groups of interest are one-parameter (Lie) transformation groups.Ī 2-process theory of human information processing is proposed and applied to detection, search, and attention phenomena. A representation that is invariant and preserves uniqueness, and hence encodes the transformational state, is said to be “invariant in the strong sense,” whereas a representation that is invariant but not unique is called “invariant in the weak sense.”The chapter also present results concerning invariant coding, which are obtained using the theory of Lie transformation groups. Two requirements are necessary for the invariant pattern recognition: the invariance of the encoding ensures recognition of the pattern even though it is transformed with respect to the prototype, whereas uniqueness prevents false recognitions. Thus, “invariant coding” deals precisely with the problem of finding a representation of the pattern-that is, invariant under certain transformations preserves the uniqueness of the representation. The ability of any visual system to perform invariant to a given transformation is determined by the way the visual input is encoded, or internally represented, by the system. This chapter discusses invariant pattern recognition and the problem of object recognition. Results were accurately described by a quantification of attentional effects in a general information processing model. These results conform to the hypothesis that attention operates at the perceptual stage of processing. The nonconfusable background items improved more rapidly with increases in processing time than did performance with the confusableīackground items. The pattern mask yielded standard masking functions, but performance with Only when the background items were confusable. Performance decreased with increases in the delay of the arrow cue The indicator was either an arrow cue or a pattern mask. Processing, the location of the target letter was indicated either slightly before or shortly after the display presentation. In order to eliminate differences in decision The target detection task is designed to bypass short-term memory limitations. The irrelevant background items were either highly confusable or completely nonconfusable with the target letters. Observers were asked to indicate which of four target letters occurred in a four-item The present study addresses the question of whether perceptualįactors also contribute to this limitation. In the span of apprehension in tachistoscopic experiments. Previous research has demonstrated that decision processes and short-term memory limitations contribute to the observed limitation
0 Comments
Leave a Reply. |