Photographs and images

Question 1

All photographs are images vice versa, true or false?

Answer 1

False

Question 2

A collection of pixels laid out in a specific order with width and height is called

Answer 2

Digital image

Question 3

Images can be considered

Answer 3

Any pictorial representation

Question 4

The wavelength of light commonly called color is referred to as

Answer 4

Hue

Question 5

……. indicates how pure a color is or how much white a color is mixed with

Answer 5

Saturation

Question 6

The path followed by a satellite is called

Answer 6

Orbits

Question 7

Satellites at a very high altitude which view the same portion of the earth surface at all times by matching the earth’s speed and rotation is called?

Answer 7

Geostationary or geosynchronous

Question 8

Where orbits follow a N-S which in conjunction with the rotation of the earth allows then to cover most of the surface of the earth overtone is

Answer 8

Polar or near polar orbits

Question 9

……. cover each area of the world at a constant local time called local sun time.

Answer 9

Sun-synchronous

Question 10

The area being seen by the sensor at a particular time is

Answer 10

SWATH

Question 11

Between a person’s view from an airplane and from space, who sees more details and less area ?

Answer 11

The plane’s view

Question 12

A measure of the level of detail in an image often referred in terms of ground area represented by pixel is called?

Answer 12

Spatial resolution

Question 13

The angular cone of visibility of the sensor minted on a platform is called ….

Answer 13

Instantaneous field of view (IFOV)

Question 14

The smallest unit of an image is called

Answer 14

a pixel

Question 15

Pixel and spatial resolution are the same, true or false?

Answer 15

False

Question 16

The ability of a sensor to define very narrow wavelength intervals is called ,

Answer 16

spectral resolution

Question 17

Black and white images are as a result of ….

Answer 17

poor spectral resolution

Question 18

Colored film is as a result of ….

Answer 18

fine spectral resolution

Question 19

Poor spectral resolution records as

Answer 19

one

Question 20

Fine spectral resolution records bands as

Answer 20

separate

Question 21

Polar orbits have an inclination near

Answer 21

90 degrees

Question 22

The major orbits are

Answer 22

polar and sun-synchronous

Question 23

Polar orbits take approximately…..for the satellite to complete one orbit.

Answer 23

90 minutes

Question 24

Which orbits are used for satellites that need a constant amount of sunlight?

Answer 24

sun-synchronous

Question 25

Satellite that image the earth work best with

Answer 25

bright sunlight

Question 26

Satellite that measure long wave radiation works best in

Answer 26

complete darkness

Question 27

Geostationary satellites are

Answer 27

weather satellites

Question 28

Sun-synchronous satellites are

Answer 28

land monitoring

Question 29

The smallest size of an object that can be detected

Answer 29

spatial resolution

Question 30

The angular cone of visibility of the sensor is

Answer 30

IFOV

Question 31

For a uniform feature to be detected, it has to be ……. than the resolution cell.

Answer 31

equal to or larger

Question 32

The entire area seen by all detectors is called

Answer 32

a scene

Question 33

……describes the ability to discriminate very slight differences in energy.

Answer 33

Radiometric resolution

Question 34

Radiometric characteristics describe the

Answer 34

actual information content in an image

Question 35

The length of time it takes for a satellite to complete one entire orbit cycle is

Answer 35

temporal resolution

Question 36

Plants reflect different levels of green during the year, a sensor with which form of resolution can distinguish the levels?

Answer 36

radiometric

Question 37

Lossy is used to describe ….

Answer 37

an image format whose detail has been lost after being compressed

Question 38

Lossless is used to describe an image file format that

Answer 38

retains all its data after being compressed

Question 39

A lossless file format than can be compressed and is best for archiving

Answer 39

Tiff / geotiff

Question 40

Created for photography and can contain a lot of colors ….

Answer 40

JPG or JPEG

Question 41

A lossless format that supports animated and static images

Answer 41

GIF

Question 42

Provides a higher lossless compressions of giffs which is useful for storage of images for intermediate editing.

Answer 42

PNG (portable network graphics)

Question 43

The format that stores information for an image, one band at a time is called ?

Answer 43

BSQ (band sequential format)

Question 44

Stores first pixel for all bands first

Answer 44

BIP (band interleaved by pixel)

Question 45

Stores the first line of the first band

Answer 45

BIL (band interleaved by line format)

Question 46

Which sensor is used for capturing wavelength within the visible and infrared regions ?

Answer 46

Optical sensor

Question 47

The unique x’tics illustrated by an object when in contact with radiation is

Answer 47

spectral signature

Question 48

RADAR operates in the …..portion of the EM spectrum.

Answer 48

microwave

Question 49

Which sensor uses laser light in the near infrared portion of the EMR?

Answer 49

LIDAR

Question 50

Images are captures in two ways namely

Answer 50

framing and scanning