Image Acquisition in Computer Vision
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 the purpose of digitization in image acquisition?

  • To emit infra-red radiation
  • To project the radiation onto a 2-dimensional image plane
  • To convert the continuous image into a discrete grid (correct)
  • To absorb electromagnetic radiation

    • What type of radiation is most widely used for visualization of objects and scenes?

  • Electromagnetic radiation (correct)
  • Infra-red radiation
  • Radio radiation
  • X-ray radiation

    • What is the range of wavelengths of visible light that is important for human and computer vision?

  • 1000 to 1200 nm
  • 200 to 400 nm
  • 800 to 1000 nm
  • 400 to 800 nm (correct)

    • What is the process of projecting the radiation originating from the 3-dimensional scene onto a 2-dimensional image plane?

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

    What is the purpose of sampling in digitization?

    <p>To measure the radiation at discrete points on the image plane</p> Signup and view all the answers

    What is the result of digitization in the spatial domain and amplitude domain?

    <p>A digital image</p> Signup and view all the answers

    What is the main reason for the impression of motion in videos generated by a sequence of still images?

    <p>The frame-rate of the camera</p> Signup and view all the answers

    What is the process of mapping analog/continuous samples onto a discrete set of values?

    <p>Quantization</p> Signup and view all the answers

    What is the effect of quantization on the digitization process?

    <p>It introduces errors into the digitization process</p> Signup and view all the answers

    What is the outcome of the sampling process in the frequency domain?

    <p>A periodic replication of the spectrum of the sampled function</p> Signup and view all the answers

    What is the role of the sampling function in the sampling process?

    <p>To describe the effects of sampling in continuous space</p> Signup and view all the answers

    What is stored in the quantization process?

    <p>Indices i of discrete quantities bi</p> Signup and view all the answers

    What is the topology of the sensor arrangement in most image acquisition systems?

    <p>Regular 2-dimensional array</p> Signup and view all the answers

    What determines the quantization process?

    <p>Quantized values and associated intervals</p> Signup and view all the answers

    What is the characteristic of the quantization curve?

    <p>Not necessarily linear</p> Signup and view all the answers

    What is the purpose of the measurement in image acquisition?

    <p>To measure the intensity of the image</p> Signup and view all the answers

    What is the expression for the sampling function in the spatial domain?

    <p>s(x, y) = ∞ ∑ m=−∞ ∞ ∑ n=−∞ δ(x − m · ∆x, y − n · ∆y )</p> Signup and view all the answers

    What is the result of convolving the signal function with the sampling function?

    <p>The sampled signal function with periodic replications</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser