Principles of Image Formation and Acquisition

Description: Principles of Image Formation and Acquisition Quiz
Number of Questions: 15
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Tags: remote sensing gis image formation image acquisition
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Which of the following is not a type of electromagnetic radiation used in remote sensing?

  1. Visible light

  2. Infrared radiation

  3. Ultraviolet radiation

  4. Gamma rays


Correct Option: D
Explanation:

Gamma rays are not used in remote sensing because they are highly energetic and can be harmful to living organisms.

The process by which electromagnetic radiation interacts with an object and is reflected, absorbed, or transmitted is called:

  1. Image formation

  2. Image acquisition

  3. Image processing

  4. Image interpretation


Correct Option: A
Explanation:

Image formation is the process by which electromagnetic radiation interacts with an object and is reflected, absorbed, or transmitted.

The spatial resolution of an image is determined by:

  1. The size of the pixels in the image

  2. The wavelength of the electromagnetic radiation used to acquire the image

  3. The distance between the sensor and the object being imaged

  4. All of the above


Correct Option: D
Explanation:

The spatial resolution of an image is determined by the size of the pixels in the image, the wavelength of the electromagnetic radiation used to acquire the image, and the distance between the sensor and the object being imaged.

The spectral resolution of an image is determined by:

  1. The number of different wavelengths of electromagnetic radiation used to acquire the image

  2. The width of the spectral bands used to acquire the image

  3. The sensitivity of the sensor to different wavelengths of electromagnetic radiation

  4. All of the above


Correct Option: D
Explanation:

The spectral resolution of an image is determined by the number of different wavelengths of electromagnetic radiation used to acquire the image, the width of the spectral bands used to acquire the image, and the sensitivity of the sensor to different wavelengths of electromagnetic radiation.

The radiometric resolution of an image is determined by:

  1. The number of bits used to represent each pixel in the image

  2. The range of values that can be represented by each pixel in the image

  3. The sensitivity of the sensor to different levels of electromagnetic radiation

  4. All of the above


Correct Option: D
Explanation:

The radiometric resolution of an image is determined by the number of bits used to represent each pixel in the image, the range of values that can be represented by each pixel in the image, and the sensitivity of the sensor to different levels of electromagnetic radiation.

The temporal resolution of an image is determined by:

  1. The frequency at which the image is acquired

  2. The length of time over which the image is acquired

  3. The time it takes to process the image

  4. All of the above


Correct Option: D
Explanation:

The temporal resolution of an image is determined by the frequency at which the image is acquired, the length of time over which the image is acquired, and the time it takes to process the image.

The geometric accuracy of an image is determined by:

  1. The accuracy of the sensor's position and orientation

  2. The accuracy of the ground control points used to calibrate the image

  3. The accuracy of the image processing algorithms used to correct for geometric distortions

  4. All of the above


Correct Option: D
Explanation:

The geometric accuracy of an image is determined by the accuracy of the sensor's position and orientation, the accuracy of the ground control points used to calibrate the image, and the accuracy of the image processing algorithms used to correct for geometric distortions.

Which of the following is not a type of remote sensing platform?

  1. Aircraft

  2. Satellites

  3. Drones

  4. Ships


Correct Option: D
Explanation:

Ships are not typically used as remote sensing platforms because they are not able to fly above the Earth's surface.

The process of acquiring images from a remote sensing platform is called:

  1. Image formation

  2. Image acquisition

  3. Image processing

  4. Image interpretation


Correct Option: B
Explanation:

Image acquisition is the process of acquiring images from a remote sensing platform.

The process of converting raw image data into a format that can be used for analysis is called:

  1. Image formation

  2. Image acquisition

  3. Image processing

  4. Image interpretation


Correct Option: C
Explanation:

Image processing is the process of converting raw image data into a format that can be used for analysis.

The process of extracting information from images is called:

  1. Image formation

  2. Image acquisition

  3. Image processing

  4. Image interpretation


Correct Option: D
Explanation:

Image interpretation is the process of extracting information from images.

Which of the following is not a type of image interpretation?

  1. Visual interpretation

  2. Digital image processing

  3. Machine learning

  4. Statistical analysis


Correct Option: D
Explanation:

Statistical analysis is not a type of image interpretation because it does not involve the extraction of information from images.

The process of using remote sensing images to create maps is called:

  1. Image formation

  2. Image acquisition

  3. Image processing

  4. Image interpretation


Correct Option: D
Explanation:

Image interpretation is the process of using remote sensing images to create maps.

The process of using remote sensing images to monitor changes in the Earth's surface is called:

  1. Image formation

  2. Image acquisition

  3. Image processing

  4. Image interpretation


Correct Option: D
Explanation:

Image interpretation is the process of using remote sensing images to monitor changes in the Earth's surface.

The process of using remote sensing images to manage natural resources is called:

  1. Image formation

  2. Image acquisition

  3. Image processing

  4. Image interpretation


Correct Option: D
Explanation:

Image interpretation is the process of using remote sensing images to manage natural resources.

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