Fig. 4.

Examples of synthetic visual stimuli used in the control experiment. (A) A binary “Full Image” containing both contours and textures, contour-only and texture-only images are shown in panels B and C, respectively. Panel (D) illustrates an image where a random-half is masked out. Thus this image contains both contours and texture but a sparseness and contrast-energy similar to the contour-only and texture-only images. These images have the same statistical properties as the pseudo-natural images (Fig. 2), but have no recognizable content.