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Remote sensing > Photographs and images > Flashcards

Photographs and images Flashcards

1
Q

All photographs are images vice versa, true or false?

A

False

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2
Q

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

A

Digital image

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3
Q

Images can be considered

A

Any pictorial representation

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4
Q

The wavelength of light commonly called color is referred to as

A

Hue

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5
Q

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

A

Saturation

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6
Q

The path followed by a satellite is called

A

Orbits

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7
Q

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?

A

Geostationary or geosynchronous

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8
Q

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

A

Polar or near polar orbits

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9
Q

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

A

Sun-synchronous

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10
Q

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

A

SWATH

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11
Q

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

A

The plane’s view

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12
Q

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

A

Spatial resolution

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13
Q

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

A

Instantaneous field of view (IFOV)

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14
Q

The smallest unit of an image is called

A

a pixel

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15
Q

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

A

False

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16
Q

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

A

spectral resolution

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17
Q

Black and white images are as a result of ….

A

poor spectral resolution

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18
Q

Colored film is as a result of ….

A

fine spectral resolution

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19
Q

Poor spectral resolution records as

A

one

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20
Q

Fine spectral resolution records bands as

A

separate

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21
Q

Polar orbits have an inclination near

A

90 degrees

22
Q

The major orbits are

A

polar and sun-synchronous

23
Q

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

A

90 minutes

24
Q

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

A

sun-synchronous

25
Q

Satellite that image the earth work best with

A

bright sunlight

26
Q

Satellite that measure long wave radiation works best in

A

complete darkness

27
Q

Geostationary satellites are

A

weather satellites

28
Q

Sun-synchronous satellites are

A

land monitoring

29
Q

The smallest size of an object that can be detected

A

spatial resolution

30
Q

The angular cone of visibility of the sensor is

A

IFOV

31
Q

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

A

equal to or larger

32
Q

The entire area seen by all detectors is called

A

a scene

33
Q

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

A

Radiometric resolution

34
Q

Radiometric characteristics describe the

A

actual information content in an image

35
Q

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

A

temporal resolution

36
Q

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

A

radiometric

37
Q

Lossy is used to describe ….

A

an image format whose detail has been lost after being compressed

38
Q

Lossless is used to describe an image file format that

A

retains all its data after being compressed

39
Q

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

A

Tiff / geotiff

40
Q

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

A

JPG or JPEG

41
Q

A lossless format that supports animated and static images

A

GIF

42
Q

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

A

PNG (portable network graphics)

43
Q

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

A

BSQ (band sequential format)

44
Q

Stores first pixel for all bands first

A

BIP (band interleaved by pixel)

45
Q

Stores the first line of the first band

A

BIL (band interleaved by line format)

46
Q

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

A

Optical sensor

47
Q

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

A

spectral signature

48
Q

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

A

microwave

49
Q

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

A

LIDAR

50
Q

Images are captures in two ways namely

A

framing and scanning

Remote sensing (6 decks)

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