Digital Image Representation and Processing

What is the primary difference between bitmap and vector image representations?

Vector images are better for displaying high-quality images
Bitmap images use more memory than vector images
Vector images use a series of drawing commands to represent an image (correct)
Bitmap images are more suitable for geometric manipulations

What are the advantages of bitmap graphics?

Quality and display speed (correct)
Allow geometric manipulations without introducing artifacts
Require less memory and allow resizing
Have smaller memory storage requirements

What is a common limitation of digital image representation?

No memory storage requirements
Infinite resolution
Perfect representation of an image
Artifacts due to finite resolution and color mapping (correct)

What is a disadvantage of bitmap graphics?

Have larger memory storage requirements (A) Signup and view all the answers

What is the purpose of image processing operations?

To affect pixel values (A) Signup and view all the answers

What are the two main ways of encoding the contents of a 2D image in digital format?

Bitmap and vector image (C) Signup and view all the answers

What is a key factor in selecting an adequate representation of an image?

All of the above (D) Signup and view all the answers

What does a 0 usually represent in a binary image?

Black (C) Signup and view all the answers

What type of images are binary images usually suitable for?

Images containing simple graphics, text, or line art (A) Signup and view all the answers

How many bits are usually used to represent each pixel in a gray-level image?

8 bits (B) Signup and view all the answers

What is the minimum number of gray levels required to meet the human visual system requirements?

64 (A) Signup and view all the answers

What makes the representation of color images more complex?

The varied and complex nature of color representation (D) Signup and view all the answers

What is the primary function of a color map in an image?

To store the color palette of the image (C) Signup and view all the answers

What type of compression is suitable for general purpose photographic images?

Lossy compression (C) Signup and view all the answers

What type of images is lossless compression recommended for?

Medical images and space images (B) Signup and view all the answers

What is the purpose of compression in image file formats?

To reduce the storage space and transmission time (C) Signup and view all the answers

What type of compression results in a tolerable degree of deterioration in the visual quality of the image?

Lossy compression (C) Signup and view all the answers

What is the typical number of bits used to represent each pixel in an RGB color image?

24 (C) Signup and view all the answers

What is the maximum number of color combinations possible in a 24-bit color representation?

16 million (B) Signup and view all the answers

What is the purpose of the alpha channel in a 32-bit color representation?

To provide a measure of transparency for each pixel (D) Signup and view all the answers

What is the main advantage of using an indexed representation of color images?

It provides better backward compatibility with older hardware (D) Signup and view all the answers

How are color images represented in an indexed representation?

Using a 2D array containing indices to a color palette (B) Signup and view all the answers

What is the typical maximum size of a color palette in an indexed representation?

256 colors (C) Signup and view all the answers