15-463 Computational Photography

Project 0 (Andrew Charkin) - Vertigo Effect (Dolly Zoom)

Sequence 1 Sequence 1 Field of View

Sequence 1 - Fairfax 8th floor Hallway

Daescription

A gif of pictures taken of the hallway outside of my Fairfax Appartment room. The theory behind the process of taking these pictures is simple: take a picture, zoom in once and step back such that an object (in this case, the door on the right) remains in about the same position. However, the execution was slightly more difficult. As you can see the camera shakes from time to time and as a result some pictures are blurry.

The camera I used was: Canon PowerShot SD550


Sequence 2 - Nested Dolly Zoom in FFax room

Description

A gif of pictures taken of my computer and a lamp in my appartment. Like in the previous sequence I simply took a picture, clicked zoom once, stepped back, took a picture, etc. Except, here I chose to make part of my computer (the thing on the left that keeps changing with a bluish hue) as the subject. As you can see, the lamp in the background slowly dissapears because of the dolly zoom. There is of course, one more twist to this, as I was taking a picture of my computer I kept changing the still frames it displayed of sequence 1. As a result you get a cool looking nested dolly zoom effect. Again, as before I had problems with keeping my camera still, so it is a bit blurry at times.

Used the same camera as in sequence 1: Canon PowerShot SD550


Computing field of view

left: no zoom, right: max zoom
  • table width: 61 cm
  • min distance: 65 cm
  • max distance: 187 cm
Min FOV: 2*arctan(61 cm)/(2* 65 cm) = 50.3 Degrees
Max FOV: 2*arctan(61 cm)/(2* 187 cm) = 18.5 Degrees