MCQ_Lecture 3 Image Processing Techniques Quiz
18 Questions
3 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is an advantage of bilinear interpolation over nearest neighbor method?

  • It provides a more spatially accurate result (correct)
  • It produces a stair-step effect in the image
  • It reduces contrast by averaging neighbouring values
  • It is faster in computation

    • What is a challenge in cloud screening over bright surfaces?

  • Separating clouds from thick aerosol loading
  • Identifying snow and ice
  • Distinguishing clouds from bright sand
  • All of the above (correct)

    • What spectral band is used in Landsat 8 for cloud detection?

  • Cirrus band 9 (correct)
  • Cirrus band 12
  • Cirrus band 5
  • Cirrus band 1

    • What is a disadvantage of bilinear interpolation?

    <p>It alters original data and reduces contrast</p> Signup and view all the answers

    What affects information retrieval from an image?

    <p>All of the above</p> Signup and view all the answers

    What is the result of bilinear interpolation on an image?

    <p>It appears smooth and sharpened</p> Signup and view all the answers

    What is the characteristic of the noise that causes images to have a 'salt and pepper' or 'snowy' appearance?

    <p>Abrupt changes in pixel values</p> Signup and view all the answers

    How can bad pixels be identified in an image?

    <p>By comparing each pixel with its neighbours</p> Signup and view all the answers

    What is the purpose of radiometric correction in remote sensing?

    <p>To correct for systematic differences in digital numbers</p> Signup and view all the answers

    What is the typical size of a moving neighbourhood used in noise removal procedures?

    <p>3 x 3 or 5 x 5 pixels</p> Signup and view all the answers

    What is the term used to describe the removal of stripe noise from an image?

    <p>De-stripping</p> Signup and view all the answers

    What is the method of replacing a noisy pixel value with the average of its neighbouring values?

    <p>Neighbourhood averaging</p> Signup and view all the answers

    What is the primary goal of image enhancement in digital image processing?

    <p>To make features look more clearly by optimal use of color</p> Signup and view all the answers

    What is the process of digitally identifying and classifying pixels and each object in the image?

    <p>Image classification</p> Signup and view all the answers

    What is the primary purpose of image filtering in digital image processing?

    <p>To enhance or suppress specific spatial patterns in an image</p> Signup and view all the answers

    What is the primary goal of data merging or data fusion in digital image processing?

    <p>To combine and transform the original bands into new images</p> Signup and view all the answers

    What is the characteristic of Tier 1 in Landsat Collections?

    <p>Data is provided after 14-26 days delay</p> Signup and view all the answers

    What is the primary use of Real-Time Tier in Landsat Collections?

    <p>Monitoring events and natural disasters</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser