The appearance of visual objects varies substantially across the visual field. Could such spatial heterogeneity be due to undersampling of the visual field by neurons selective for stimulus categories? Here, we show that which parts of a bistable vase-face image observers perceive as figure and ground depends on the retinal location where the image appears. The spatial patterns of these perceptual biases were similar regardless of whether the images were upright or inverted. Undersampling by neurons tuned to an object class (e.g., faces) or variability in general local versus global processing cannot readily explain this spatial heterogeneity. Rather, these biases could result from idiosyncrasies in low-level sensitivity across the visual field.

视觉对象的外观在整个视野中都有很大变化。这样的空间异质性可能是由于对刺激类别有选择性的神经元对视野的欠采样造成的吗？在这里，我们显示了双稳态花瓶表面图像观察者将哪些部分视作人物和地面，取决于图像出现在视网膜上的位置。无论图像是直立的还是倒立的，这些感知偏差的空间模式都相似。调整为对象类别（例如，面孔）的神经元欠采样或总体局部处理与全局处理的可变性无法轻易解释这种空间异质性。而是，这些偏见可能是由于特质导致整个视野的灵敏度降低所致。