Digital Image Processing Lecture 2: Image Definition and Applications

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What is the definition of an image in the context of digital image processing?

A two-dimensional function (correct)
A four-dimensional function
A three-dimensional function
A one-dimensional function

How is the intensity or gray level of an image at a specific point defined?

By the amplitude of the function f at that point (correct)
By the frequency of occurrence of colors
By the number of neighboring pixels
By the size of the pixel

What do we call an image when x, y, and the amplitude values of f are all finite, discrete quantities?

A digital image (correct)
A grayscale image
A vector image
An analog image

What are the elements referred to as in a digital image?

Image elements and pels (A) Signup and view all the answers

What are the principal application areas that generate interest in digital image processing methods?

Improvement of pictorial information for human interpretation (C) Signup and view all the answers

What are some sources for digital images mentioned in the text?

Electromagnetic and electronic images (A) Signup and view all the answers

What is the definition of a digital image?

A two-dimensional function with spatial coordinates x and y (C) Signup and view all the answers

What does a digital image processing cover?

Low-, mid-, and high-level processes (B) Signup and view all the answers

What do the numbers in a digital image indicate?

Variations of red, green, and blue at a particular location on a grid of pixels (D) Signup and view all the answers

What are the elements of a digital image often referred to as?

Pixels (B) Signup and view all the answers

What term is used to refer to the finite, discrete quantities of x, y, and the amplitude values of f in a digital image?

Pixel elements (D) Signup and view all the answers

In the context of digital image representation, what do the numbers in a digital image indicate?

Variations of red, green, and blue at a particular location (B) Signup and view all the answers

What are picture elements, image elements, pels, and pixels collectively referred to as in a digital image?

Pixel elements (C) Signup and view all the answers

What are the principal application areas generating interest in digital image processing methods as mentioned in the text?

Processing images for autonomous machine perception (D) Signup and view all the answers

Which energy spectrum is mentioned as a source for digital images in the text?

Electromagnetic (EM) energy spectrum (D) Signup and view all the answers

What are the finite number of elements in a digital image referred to as according to the text?

Pixel elements (C) Signup and view all the answers

What are the main differences between low-level, mid-level, and high-level processes in digital image processing?

Low-level processes involve inputs and outputs as images, mid-level processes involve recognition of individual objects, and high-level processes involve attributes extraction. (B) Signup and view all the answers

What does a digital image consist of in terms of spatial coordinates and amplitude?

A digital image consists of x and y as spatial coordinates and the amplitude as intensity or grayscale level at a point (x, y). (D) Signup and view all the answers

What is the primary definition of a pixel in the context of a digital image?

A pixel is a numeric value indicating variations of red, green, and blue at a specific location on an image grid. (C) Signup and view all the answers

What is the primary purpose of digital image processing?

The primary purpose is to analyze digital images to extract information for pattern recognition and object identification. (A) Signup and view all the answers