Table 1.

List of some triangulation techniques for 3-D image generation found in the literature for different visual cues.

Triangulation Approach	Visual Cue	3-D Image Generation Techniques
Digital photogrammetry	Stereopsis	Stereo vision [17]
		Multi-view stereo [18]
		Multiple-baseline stereo [19]
	Motion	Structure-from-motion [20]
		Shape-from-zooming [21]
		Optical flow [22]
	Silhouette	Shape-from-silhouette [23]
		Shape-from-photoconsistency [24]
		Shape-from-shadow [25]
Structured light	Texture	Shape-from-texture [26] Shape-from-structured light [27]
Shading	Shading	Shape-from-shading [28]
		Photometric stereo [29]
Focus	Focus	Shape-from-focus [30]
		Shape-from-defocus [31]
Theodolite	Stereopsis	Trigonometry [32]