Sample and Quantization

Pre Test

1. What are the two main steps involved in converting an analog image to a digital image?

a) Compression and Transmission
b) Sampling and Quantization
c) Filtering and Sharpening
d) Resizing and Cropping

2. According to the Nyquist Theorem, the sampling frequency should be:

a) Equal to the lowest frequency of the image
b) Less than the highest frequency of the image
c) Twice the highest frequency of the image
d) Half the highest frequency of the image

3. Which of the following is a consequence of low quantization levels?

a) More accurate intensity representation
b) Better image detail
c) False contouring and visible artifacts
d) Increase in bit depth

4. What does bit depth in an image represent?

a) Image size in megabytes
b) Image width and height in pixels
c) Number of bits used to represent spatial resolution
d) Number of bits used per pixel to represent intensity

5. What does a higher sampling rate result in?

a) Loss of detail
b) More compression
c) Lower resolution
d) Better image quality