Image Representation in Computer Science

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Questions and Answers

What is the term used to describe each element in a digitized image array?

Pixel (correct)

Image Element

Pel Element

Picture Element

According to the coordinate convention shown in the figure, what is the direction of the M axis?

Towards the top

Out of the page (correct)

Into the page

Towards the right

What is the purpose of dividing an image into pixels?

To enhance the image quality

To reduce the image size

To compress the image

To facilitate digital image processing (correct)

What is the unit of a digitized image represented by the number '1' in the figure?

Pixel Signup and view all the answers

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

Pixel Signup and view all the answers

What do the terms 'image' and 'pixel' refer to in digital context?

Digital image and its elements Signup and view all the answers

What is the relationship between an image and a pixel?

An image is composed of pixels Signup and view all the answers

What is implied by the term 'digital image'?

An image displayed on a screen Signup and view all the answers

What is a pixel in the context of digital imaging?

A single element of a digital image Signup and view all the answers

What is the scope of the terms 'image' and 'pixel' in digital context?

Throughout digital imaging discussions Signup and view all the answers

What is characteristic of Truecolor images?

Pixel color is determined by a combination of color planes Signup and view all the answers

In Truecolor images, what determines the color of each pixel?

The combination of red, green, and blue intensities Signup and view all the answers

How do Truecolor images store color information?

In three separate color planes Signup and view all the answers

What is NOT a characteristic of Truecolor images?

Use of a colormap Signup and view all the answers

What type of image is depicted in the figure?

Truecolor image Signup and view all the answers

Where is the color information for each pixel stored in Truecolor images?

In each pixel's location in the color planes Signup and view all the answers

How many bits are used to represent each color component in a truecolor image?

8 bits Signup and view all the answers

What is the total number of bits used to represent a truecolor image?

24 bits Signup and view all the answers

What is the purpose of breaking down a truecolor image into its color components?

To facilitate image storage and display Signup and view all the answers

Why do graphics file formats store truecolor images as 24-bit images?

To conform to a standard format Signup and view all the answers

What is the size of the cameraman image to be read and displayed using MATLAB code?

256 x 256 Signup and view all the answers

What programming language is used to read and display the cameraman image?

MATLAB Signup and view all the answers

What is the purpose of the code that reads and displays the cameraman image?

To display the image Signup and view all the answers

What type of image is the cameraman image?

Grayscale image Signup and view all the answers

What is the purpose of the homework assignment?

To practice reading and displaying images using MATLAB Signup and view all the answers

Study Notes

Coordinate Conventions

The coordinate convention is illustrated in the figure, with axes labeled 1, 2, 3, and N, and a point M with a radial distance r.

Images as Matrices

A digitized image is represented as an array, with each element called an image element, picture element, pixel, or pel.
The terms "image" and "pixel" are used to denote a digital image and its elements.
In truecolor images, the color of each pixel is determined by the combination of red, green, and blue intensities stored in each color plane at the pixel's location.
Truecolor images do not use a colormap.
Graphics file formats store truecolor images as 24-bit images, where the red, green, and blue components are 8 bits each.

Homework

Q3: Write a MATLAB code to read and show a 256 x 256 cameraman image.

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Description

This quiz explores the concept of image representation as matrices, including coordinate conventions and pixel values.