CSC 461: Computer Graphics I (Fall 2006)

Assignment 1

Due September 20, Wednesday, 2006

1. Briefly explain:
1. Angle of view and depth of field
2. Disadvantages of the pinhole camera model
3. How the synthetic camera model overcomes the disadvantages of the pinhole camera model
4. Graphics pipeline

1. (Ex. 1.1) The focal length of a camera lens is the distance from the center of the lens to the point at which parallel rays of light will all be focused. For a pinhole camera, the focal length is the distance from the pinhole to the film plane. The dimensions of a frame of 35-mm file are about 24mm x 36mm. Assume that the human visual system has an angle of view of 90 degrees, what focal length should we use with 35-mm film to achieve a natural view? (Refer to Figure 1.16)

2. (Ex. 1.8) Movies are generally produced on 35-mm film that has a resolution of approximately 2000x3000 pixels. What implication does this resolution have for producing animated images for television as compared with film?

3. (Ex. 1.10) It is possible to design a color CRT that uses a single electron gun and does not have a shadow mask. The single beam is turned on and off at the appropriate times to excite the desired phosphors. Why might such a CRT be more difficult to design, as compared to the shadow-mask CRT?