40 Questions
What do space-borne instruments measure?
Electromagnetic waves emitted, reflected or scattered by the Earth’s surface
What is the primary focus of the lecture 'Remote Sensing Image Pre-processing'?
Processes of Image Pre-processing
What is the primary concern when collecting and exploiting remote sensing data?
Data availability and accessibility
What is the title of the handbook that provides guidelines for MODIS Surface Reflectance?
MODIS Surface Reflectance User’s Guide
What is the title of the handbook that provides guidelines for Sentinel-2?
Sentinel-2 User Handbook
What is the title of the handbook that provides guidelines for Landsat 8?
Landsat 8 Data Users Handbook
What is the formula for calculating NDVI in Landsat 8/9?
(Band 5 – Band 4) / (Band 5 + Band 4)
What is the topic that will be covered in Lecture 5?
Remote Sensing Image Interpretation
What is the topic of the homework assigned in Lecture 4?
Histogram equalization and matching
What is the focus of the kernel explanation in the lecture notes?
Low pass filter and high pass filter
What is the primary factor that determines the revisit time of a remote sensing satellite?
The satellite's orbital period
What is the term used to describe the path on the Earth's surface that is imaged by a remote sensing satellite?
Ground track
What is the term used to describe the time it takes for a remote sensing satellite to repeat its imaging cycle?
Repeat cycle
What is the term used to describe the angle of view of a remote sensing satellite's sensor?
Field of view
What is the term used to describe the time it takes for a remote sensing satellite to complete one orbit around the Earth?
Orbital period
What type of filters emphasize low-frequency changes in brightness and de-emphasize high-frequency local detail?
Low pass filters
What is the purpose of a median filter in image processing?
Noise removal
What type of filters are used to emphasize high-frequency components of images and de-emphasize more general, low-frequency detail?
High pass filters
What is the result of applying a smoothing filter to an image?
Loss of high-frequency detail
What is the purpose of edge detection filters in image processing?
Edge enhancement
What is the operation of applying a spatial filter to an image called?
Convolution
What is the kernel in image processing?
A moving window used for convolution
What is the shape of the kernel in image processing?
Square
What is the purpose of convolution in image processing?
Image filtering
What are the three stages involved in the convolution operation?
Input image, kernel, output image
What is the primary application of Land surface temperature reconstruction in remote sensing?
Urban heat island monitoring
Which task involves the use of the CCDC method and Landsat data?
Land use/cover change detection
What is the focus of the task involving the DOTA dataset?
Object detection
What is the application of remote sensing in Earth surface monitoring?
All of the above
What is the focus of the task involving the AID dataset?
Scene classification
What is the primary objective of image classification in Earth Observation?
To categorize all pixels using numerical, spectral patterns
What is the key distinction between Land Use and Land Cover classifications?
Land use refers to human activities, while land cover refers to material present on the landscape
What is the primary advantage of Machine Learning in remote sensing?
It automates the detection of patterns in large datasets
What is the key characteristic of supervised learning in Machine Learning?
It requires labeled training data to learn patterns
What is the primary focus of image classification in Remote Sensing?
To automatically categorize all pixels using numerical, spectral patterns
What is the main drawback of the bilinear method in image processing?
It reduces contrast by averaging neighboring values together.
What is the primary issue with cloud screening in remote sensing?
Clouds affect the retrieval of real reflectance from the ground.
What is the advantage of bilinear method over nearest neighbor?
It reduces the stair-step effect and produces a smooth image.
Why are clouds difficult to distinguish from aerosols?
Because they have similar spectral reflectance.
What is the purpose of cloud screening in remote sensing?
To identify and remove clouds from the image.
This quiz covers the basics of remote sensing, including system types and the remote sensing process. Learn about the differences between passive and active systems, radiation, and interaction with the atmosphere.
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