4.12.1. Orienting a stereo-pair of photographs

Try these first

1. 1.

   What is the role of the principal point in stereoscopic photography?

   Hint

   Think about where the camera lens focuses during capture.

2. 2.

   Why is overlap essential in stereo-pair photographs?

   Hint

   Consider how humans perceive depth with their eyes.

3. 3.

   What is the principal function of a stereoscope?

   • To magnify images
   • To fuse images into a 3D view
   • To capture photographs

   Hint

   What does each lens of the stereoscope do?

4. 4.

   True or False: The absence of overlap in stereo photographs can lead to inaccurate 3D models.

   • True
   • False

   Hint

   Consider what overlap contributes to our vision.

5. 5.

   A stereo-pair of two photographs shows a hill and a valley. Describe how you would orient these photographs and what key factors to consider during the process.

   Hint

   Think about height differences and visual features of the terrain.

6. 6.

   While measuring elevation using stereoscopic images, one photograph is excessively tilted. Discuss the implications this might have on the height measurements and how you might correct them.

   Hint

   Consider how tilt affects perspective and measurement.