Figure 2
From: Task-dependent contribution to edge-based versus region-based texture perception

Example orientation-modulated textures. (a) Three types of modulation waveform: sinewave (Sine), square-wave (Square) and cusp-wave (Cusp), all at 2 cycles-per-image (cpi) or 0.2 cycles-per-deg (cpd), and (b) with different modulation waveform frequencies: 1, 4 and 8 cpi, corresponding to 0.1, 0.4 and 0.8 cpd.