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DIGITAL IMAGE PROCESSING EXAM WITH CORRECT
ACTUAL QUESTIONS AND CORRECTLY WELL DEFINED
ANSWERS LATEST 2024 – 2025 ALREADY GRADED A+
When did digital image processing begin? - (answers)1960s
When did Landsat-1 launch? - (answers)1972
What are the requirements for digital image processing? - (answers)Image
acquisition, a computer, storage, and software for processing
What is the image processing flow? - (answers)1. Data ingest
2. Image assessment and statistics
3. Restoration and preprocessing
4. Enhancements
5. Feature extraction
6. Image classification or quantification
7. Map or derivative image output
8. Validation and accuracy assessment
What are the advantages of digital processing? - (answers)1. Ability to quantify
brightness levels
2. Greater standardization
3. Can achieve greater efficiency
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4. Restore image fidelity
5. Enhance earth surface features for improved interpretability
What are the disadvantages of digital processing? - (answers)1. Lower
interpretation accuracy
2. Cost
3. More sophisticated equipment and training requirements
What is the difference between active and passive remote sensing? -
(answers)You create energy and send it out with active remote sensing, whereas
passive remote sensing is receiving energy like sunlight or thermal energy
What are the four types of remote sensing resolution? - (answers)1. Spatial
2. Temporal
3. Spectral
4. Radiometric
What is spatial resolution? - (answers)The level of detail or clarity of an image,
determined by the size of the individual pixels. Satellite images with a smaller
pixel size have higher spatial resolution
What is a pixel? - (answers)Abbreviation of 'picture element.' A pixel is the
smallest 2D unit of an image. Its location is x (column) and y (row)
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What is a BV? - (answers)Brightness value of a pixel. Refers to the intensity of light
or electromagnetic radiation reflected or emitted from the corresponding
location on the Earth's surface. It is often measured on a scale from 0 to 255. Also
known as the DN, or digital number
What is spectral resolution? - (answers)The ability of a sensor to distinguish
between different wavelengths of electromagnetic radiation. Sensors with higher
spectral resolution can distinguish between more narrow bands of wavelengths,
allowing for more detailed analysis of the composition and properties of the
observed targets. Quantifies the number and dimension of the EMR wavelength
regions to which the sensor is sensitive
What are bands? - (answers)Digital sensors store the visible and non-visible
electromagnetic spectrum in different bands. Sensors can pick up on more than
red, green, and blue light (such as near-infrared)
What is the difference between broad and hyperspectral bands? - (answers)Broad
bands (such as bands 1-4) have longer wavelengths than hyperspectral bands that
are more narrow and data intensive
What is the difference between broadband sensors and multispectral sensors? -
(answers)Multispectral or hyperspectral sensors can capture information across
several bands or even narrow spectral channels, providing detailed spectral
signatures for different materials. On the other hand, broadband sensors capture
less narrow bands
DIGITAL IMAGE PROCESSING EXAM WITH CORRECT
ACTUAL QUESTIONS AND CORRECTLY WELL DEFINED
ANSWERS LATEST 2024 – 2025 ALREADY GRADED A+
When did digital image processing begin? - (answers)1960s
When did Landsat-1 launch? - (answers)1972
What are the requirements for digital image processing? - (answers)Image
acquisition, a computer, storage, and software for processing
What is the image processing flow? - (answers)1. Data ingest
2. Image assessment and statistics
3. Restoration and preprocessing
4. Enhancements
5. Feature extraction
6. Image classification or quantification
7. Map or derivative image output
8. Validation and accuracy assessment
What are the advantages of digital processing? - (answers)1. Ability to quantify
brightness levels
2. Greater standardization
3. Can achieve greater efficiency
,2|Page
4. Restore image fidelity
5. Enhance earth surface features for improved interpretability
What are the disadvantages of digital processing? - (answers)1. Lower
interpretation accuracy
2. Cost
3. More sophisticated equipment and training requirements
What is the difference between active and passive remote sensing? -
(answers)You create energy and send it out with active remote sensing, whereas
passive remote sensing is receiving energy like sunlight or thermal energy
What are the four types of remote sensing resolution? - (answers)1. Spatial
2. Temporal
3. Spectral
4. Radiometric
What is spatial resolution? - (answers)The level of detail or clarity of an image,
determined by the size of the individual pixels. Satellite images with a smaller
pixel size have higher spatial resolution
What is a pixel? - (answers)Abbreviation of 'picture element.' A pixel is the
smallest 2D unit of an image. Its location is x (column) and y (row)
, 3|Page
What is a BV? - (answers)Brightness value of a pixel. Refers to the intensity of light
or electromagnetic radiation reflected or emitted from the corresponding
location on the Earth's surface. It is often measured on a scale from 0 to 255. Also
known as the DN, or digital number
What is spectral resolution? - (answers)The ability of a sensor to distinguish
between different wavelengths of electromagnetic radiation. Sensors with higher
spectral resolution can distinguish between more narrow bands of wavelengths,
allowing for more detailed analysis of the composition and properties of the
observed targets. Quantifies the number and dimension of the EMR wavelength
regions to which the sensor is sensitive
What are bands? - (answers)Digital sensors store the visible and non-visible
electromagnetic spectrum in different bands. Sensors can pick up on more than
red, green, and blue light (such as near-infrared)
What is the difference between broad and hyperspectral bands? - (answers)Broad
bands (such as bands 1-4) have longer wavelengths than hyperspectral bands that
are more narrow and data intensive
What is the difference between broadband sensors and multispectral sensors? -
(answers)Multispectral or hyperspectral sensors can capture information across
several bands or even narrow spectral channels, providing detailed spectral
signatures for different materials. On the other hand, broadband sensors capture
less narrow bands
