Computer Vision SS 2024: Note Taking Strategy

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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?

To overcome the limitations of global thresholding Signup and view all the answers

What is the result of binarization on an image?

A binary black and white image Signup and view all the answers

What is a challenge in choosing a thresholding value Θ?

It is difficult to determine the optimal threshold value Signup and view all the answers

What is the primary goal of preprocessing in computer vision?

To prepare images for subsequent processing steps Signup and view all the answers

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

Note taking by handwriting leads to the lowest success Signup and view all the answers

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

To reduce unwanted variability in images Signup and view all the answers

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

Image Processing Signup and view all the answers

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

Because it increases cognitive processing of the material Signup and view all the answers

How is the improvement of preprocessing measured?

Subjectively, based on human interpretation Signup and view all the answers

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

Due to nonlinearity of tissue absorption Signup and view all the answers

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

256 Signup and view all the answers

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

Pixel Signup and view all the answers

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

Upper-left corner of the image Signup and view all the answers

Why is the pixel neighborhood definition important?

It is important for various applications Signup and view all the answers

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

8 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?

-a to a and -b to b Signup and view all the answers

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

To apply a function to the intensities 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}?

1 Signup and view all the answers

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

To shrink the objects in the image 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}?

6 Signup and view all the answers

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

To build up charges in sensor elements Signup and view all the answers

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

f(x, y) - r1 < rK - f(x, y) and r1 < rK Signup and view all the answers

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

To control the movement of charges Signup and view all the answers

What is the alternative to CCD cameras?

CMOS sensor Signup and view all the answers

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

To reduce motion distortions Signup and view all the answers

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

25 Hz Signup and view all the answers

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

Imaging device Signup and view all the answers