Image Representation

How many possible colours are there per pixel?

16 million

20 million

Coloured squares are called ...

Picture processes

Picture elements

Give three reasons why computer systems use the binary number system

There are only a few rules for addition, making calculations simple

It is just as accurate as the decimal system.

Binary is a two-state system (1 or 0) which represents ‘power on/power off’

A degraded signal can still be detected as representing 1

What is the number 129 represented as a 8-bit binary number?

11010101

10000001

What is the largest number that can be stored using 6 bits?

How is a bitmap graphic stored in memory:

A single bit stores each pixel (1 for black, 0 for white)

A single byte stores each pixel (1 for black, 0 for white)

A single bit stores each pixel (0 for black, 1 for white)

A single byte stores each pixel (0 for black, 1 for white)

What is a pixel?

The most basic component of any computer number

The most basic component of any computer program

The most basic component of any computer letter

The most basic component of any computer graphic

What is meant by 'high resolution'?

A bit map image that contains

What does 'dpi' stand for?

Dots per interval

Decimals per inch

Digits per inch

Dots per inch

3.Which is the following image formats is the least suitable for computer vision?

PNG

BMP

JPEG

TIFF

Why are digital images usually rectangularly-sampled?

Becuase they are easier to process with a computer

Because that is a better match for the human eye's rod and cones

Because of the way the images are formed on a photographic film

Because it is nearly inmpossible to make hexagonally- spaced CCD's

How is an image represented in OpenCV?

As a 2D array of pixels

As a 1D array of pixels

As a 2D array of colour chanels

As a 1D array of colour chanels

Compression attributes to ...

File size

CAD packages

File name

Colour depth

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