Lesson 4 - Representing Images

Open Ended

What would be challenging about representing these two pictures to a computer? Do you think it's easier or harder than representing letters?

Open Ended

What strategy is being used with these examples that might help a computer represent images?

Multiple Select

Which of the following are possible ways computers could represent images?

• Using pixels arranged in a grid

• Using binary numbers to encode color

• Using sound waves

• Using mathematical equations for shapes

Fill in the Blanks

A

is a tiny square or dot which contains a single point of color of a larger image.

Multiple Choice

Which of the following best describes the role of a pixel in a digital image?

• A pixel is a tiny square or dot that contains a single point of color.

• A pixel is a large section of an image that stores multiple colors.

• A pixel is a type of computer program used to edit images.

• A pixel is a device used to display images on a screen.

Multiple Choice

Which of the following best describes the purpose of using a pixelation widget in digital art creation?

• To create images using small squares called pixels

• To make a detailed drawing or scketch.

• To write code for animations.

• To edit photographs.

Multiple Choice

How does changing the width and height sliders affect the appearance of a pixelated image?

• It changes the number of pixels used to display the image, which can reveal or distort the image.

• It changes the color of the pixels.

• It rotates the image.

• It adds animation to the image.

Fill in the Blanks

A pixelated image that is at least 8 x 8 in size must have at least

pixels.

Open Ended

Explain how the ASCII system and the image representation system both demonstrate the concept of breaking down big problems into smaller, manageable parts.

Open Ended

What information, besides the 0s and 1s, is necessary to decode a binary message?

Open Ended

How do you think the process of representing images with pixels is similar to or different from representing text in computers?

Open Ended

What systems do computers use to represent images?