Digital Image and video Processing

In an image compression system, 16384 bits are used to represent a 128×128 image with 256 gray levels. What is the compression ratio for this system?

• 4

• 8

• 12

• 16

_________  is the process of reconstruction of original scene from a degraded observation like noise

• Image Enhancement

• Image restoration

• Image representation

• Color processing

The reduction of the amount of data required to represent a digital image is known as

• Enhancement

• Restoration

• Representation

• Compression

Description is otherwise Called as_______

• Enhancement

• Feature selection

• Segmentation

• Recognition

In 4-neighbours of a pixel p, how far are each of the neighbours located from p?

• four pixels apart

• one pixel apart

• alternating pixels

• Two pixels apart

Two regions are said to be ___________ if their union forms a connected set.

• Adjacent

• Disjoint

• Closed

• Connected

The distance between pixels p and q, the pixels have a distance less than or equal to some value of radius r centred at (x,y) is called

• Euclidean distance

• City-Block distance

• Chessboard distance

• Connected

The distance between pixels p and q, the pixels have a distance less than or equal to some value of radius r, form a diamond centred at (x,y) is called

• Euclidean distance

• City-Block distance

• Chessboard distance

• Connected

The formula for city block distance is

• |x-s| + |y-t|

• [(x-s)2 + (y-t)2]1/2

• max(|x-s|, |y-t|)

• min(|x-s|, |y-t|)

A pixel “ p” at coordinates (x, y) has neighbors whose coordinates are given by: (x+1, y+1),        (x+1, y-1), (x-1, y+1), (x-1, y-1). This set of pixels is called as A pixel “ p” at coordinates (x, y) has neighbors whose coordinates are given by: (x+1, y+1),        (x+1, y-1), (x-1, y+1), (x-1, y-1). This set of pixels is called as 

• Diagonal Neighbors

• Non Diagonal neighbors

• opposite pixels

• nearby pixels