Computer Vision SS 2024: Note Taking Strategy
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Questions and Answers

What is a key benefit of binarization in image processing?

  • To preserve all the information contained in the grey values
  • To achieve an approximate separation of foreground and background (correct)
  • To reduce the intensity of the image
  • To convert the image to color

    • What is the simplest method for binarizing an image?

  • Local thresholding
  • Thresholding (correct)
  • Intensity normalization
  • Global thresholding

    • Why is a global threshold often problematic in thresholding?

  • It is sensitive to illumination changes within the image (correct)
  • It is only applicable to color images
  • It is computationally expensive
  • It is limited to binary images

    • What is the purpose of using multiple local thresholds in thresholding?

    <p>To overcome the limitations of global thresholding</p> Signup and view all the answers

    What is the result of binarization on an image?

    <p>A binary black and white image</p> Signup and view all the answers

    What is a challenge in choosing a thresholding value Θ?

    <p>It is difficult to determine the optimal threshold value</p> Signup and view all the answers

    What is the primary goal of preprocessing in computer vision?

    <p>To prepare images for subsequent processing steps</p> Signup and view all the answers

    What is the relation between note taking and learning success in lectures?

    <p>Note taking by handwriting leads to the lowest success</p> Signup and view all the answers

    What is the common principle behind normalization, binarization, and filtering in preprocessing?

    <p>To reduce unwanted variability in images</p> Signup and view all the answers

    What is the field of study that most preprocessing steps belong to?

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

    Why does handwriting lead to better learning success in note taking?

    <p>Because it increases cognitive processing of the material</p> Signup and view all the answers

    How is the improvement of preprocessing measured?

    <p>Subjectively, based on human interpretation</p> Signup and view all the answers

    What is the reason why a nonlinear characteristic is useful for quantization of X-ray images?

    <p>Due to nonlinearity of tissue absorption</p> Signup and view all the answers

    How many discrete intensities are usually required to yield good subjective representation of grey level images?

    <p>256</p> Signup and view all the answers

    What is the term used to describe a single grid point in a digital image?

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

    In the upper-left coordinate convention, where is the origin of the image matrix located?

    <p>Upper-left corner of the image</p> Signup and view all the answers

    Why is the pixel neighborhood definition important?

    <p>It is important for various applications</p> Signup and view all the answers

    How many bits are typically used to represent each color plane in a color image?

    <p>8</p> Signup and view all the answers

    What is the range of the neighborhood for the pixel at position (x, y) in the rank-order filter?

    <p>-a to a and -b to b</p> Signup and view all the answers

    What is the purpose of ranking the intensities in R(x, y) in the rank-order filter?

    <p>To apply a function to the intensities</p> Signup and view all the answers

    What is the result of the median rank-order filter operation on the intensities {0, 1, 1, 1, 1, 1}?

    <p>1</p> Signup and view all the answers

    What is the purpose of the erosion rank-order filter operation?

    <p>To shrink the objects in the image</p> Signup and view all the answers

    What is the result of the dilation rank-order filter operation on the intensities {2, 3, 4, 4, 5, 5, 6, 6, 6}?

    <p>6</p> Signup and view all the answers

    What is the purpose of allowing some time of exposure to incident light in sensor elements?

    <p>To build up charges in sensor elements</p> Signup and view all the answers

    What is the condition for the edge detection rank-order filter operation to return r1?

    <p>f(x, y) - r1 &lt; rK - f(x, y) and r1 &lt; rK</p> Signup and view all the answers

    In a CCD device, what is the purpose of the serial register?

    <p>To control the movement of charges</p> Signup and view all the answers

    What is the alternative to CCD cameras?

    <p>CMOS sensor</p> Signup and view all the answers

    What is the purpose of reading odd and even rows separately at a rate of 50 Hz?

    <p>To reduce motion distortions</p> Signup and view all the answers

    What is the typical rate at which image contents are read for video applications?

    <p>25 Hz</p> Signup and view all the answers

    What is the name of the device that uses a rectangular grid of photosensitive elements?

    <p>Imaging device</p> Signup and view all the answers

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