Ideal cue combination for localizing texture-defined edges

摘要: Many visual tasks can be carried out by using several sources of information. The most accurate estimates scene properties require the observer to utilize all available information and combine in an optimal manner. Two experiments are described that required observers judge relative locations two texture-defined edges (a vernier task). were signaled a change across edge texture [either frequency orientation (Experiment 1) or contrast 2)]. reliability each cue was controlled varying distance over which (in frequency, orientation, contrast) occurred—a kind “texture blur.” In some conditions, position one shifted other (“perturbation analysis”). An ideal-observer model, previously used studies depth perception color constancy, fitted data. Although fit rejected more elaborate models, especially given large quantity data, this model does account for trends A second, suboptimal switches between cues from trial poor job accounting