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Color Image Processing

Total questions: 24

Worksheet time: 48mins

Name
Class
Date
1.

Asher is learning about digital images in his computer science class. He asks his teacher, "What is the number of bits used to represent each pixel in RGB space called?"

a)

Picture depth

b)

Picture length

c)

Pixel depth

d)

Pixel length

2.

A color attribute that describes a pure color

a)

Intensity

b)

Saturation

c)

Hue

d)

Color

3.

Tara is working on a project that involves processing images. She needs to choose a model that decouples the color and gray scale information in an image, making it suitable for many of the color description.

a)

CMY

b)

CMYK

c)

HSI

d)

RGB

4.

A model in which each color appears in its primary spectral components of red, green and blue

a)

CMY

b)

CMYK

c)

HSI

d)

RGB

5.

Hue and saturation taken together are called

a)

Chromaticity

b)

Achromaticity

c)

Luminance

d)

Radiance

6.

Equal amounts of pigments primaries cyan, magenta and yellow should produce

a)

Red

b)

White

c)

Blue

d)

Black

7.

Neha is mixing equal amounts of pigment primaries Red, Green, and Blue for her art project. What color will she produce?

a)

Red

b)

White

c)

Blue

d)

Black

8.

______ refers to amount of white light mixed with hue.

a)

Saturation

b)

Chromaticity

c)

Intensity

d)

Radiance

9.

RGB color model was best suited for color generation

a)

True

b)

False

10.

HSI color model was well suited for color description

a)

True

b)

False

11.

In HSI color model, saturation of colour _______ as a function of distance

from the intensity axis.

a)

decreases

b)

increases

c)

doesn't change

d)

None

12.

Aashi observed a _____ generated by a monochromatic light that contains photons of single frequency.

a)

Intensity

b)

Saturation

c)

Hue

d)

White light

13.

Nikita is trying to understand how colors work in art. She learns that _________ is a measure of how much light of different frequencies is mixed in with a hue.

a)

Intensity

b)

Saturation

c)

Hue

d)

White light

14.

We can represent all visible colors on a cube, where red increases along the x axis, green along the y axis and blue along the z.

If the maximum value a color can have is 100, what color is represented by the coordinates (100, 0, 0)?

a)

Blue

b)

Red

c)

Green

d)

White

e)

Black

15.

Aarush is experimenting with colors using a cube, where red increases along the x axis, green along the y axis and blue along the z.

If the maximum value a color can have is 100, what color is represented by the coordinates (0, 0, 0)?

a)

Blue

b)

Red

c)

White

d)

Black

16.

We can represent all visible colors on a cube, where red increases along the x axis, green along the y axis and blue along the z.

If the maximum value a color can have is 100, what color is represented by the coordinates (100, 100, 100)?

a)

Blue

b)

Red

c)

White

d)

Black

17.

We can represent all visible colors on a cube, where red increases along the x axis, green along the y axis and blue along the z.

Yellow is defined as an equal mix of red and green. If the length of the cube is 100, what are the coordinates of the yellow corner of the cube?

a)

(100, 0, 100)

b)

(100, 100, 100)

c)

(100, 100, 0)

d)

(0, 0, 100)

18.

We can represent all visible colors on a cube, where red increases along the x axis, green along the y axis and blue along the z.

Yellow is defined as an equal mix of red and green. If the length of the cube is 100, what are the coordinates of the magenta corner of the cube?

a)

(100, 0, 100)

b)

(100, 100, 100)

c)

(100, 100, 0)

d)

(0, 0, 100)

19.

We can represent all visible colors on a cube, where red increases along the x axis, green along the y axis and blue along the z.

If the maximum value a color can have is 100, where will you find shades of grey?

a)

Any point where red, green and blue values are equal.

b)

Any point where red, green and blue values sum to 100

c)

Any point where either red, green or blue value is equal to 100

d)

Any point where red, green and blue values sum to 0

20.

A technical artist is picking colors for leaves. They have picked a pale green with a value of (100o,80%,60%) in the HSI color scheme. Now they want a darker green to add texture to the leaves.

a)

100o,50%,60%

b)

100o,80%,30%

c)

140o,80%,60%

d)

100o,80%,80%

21.

Below is a slice through the HSL cylinder where lightness is 50%.

What color does (0o,100%,50%) represent in the HSI system?

a)

Red

b)

White

c)

Black

d)

Blue

22.

Below is a slice through the HSL cylinder where lightness is 50%.

What color does (240o,0%,50%) represent in the HSI system?

a)

Red

b)

White

c)

Gray

d)

Blue

23.

Below is a slice through the HSL cylinder where lightness is 50%.

What color does (125o,50%,0%) represent in the HSI system?

a)

Black

b)

White

c)

Gray

d)

Green

24.

Below is a slice through the HSI cylinder where lightness is 50%.

The color represented by (60o,90%,70%) is

a)

Light bright yellow

b)

Dark bright yellow

c)

Light dull yellow