Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing Schools Business

Features Pricing Schools Business

10 Questions

0 Views

JPEG Image Compression: DCT Transform

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary reason for the effectiveness of the DCT transform coding method in JPEG?

The ability of humans to notice high spatial frequency components

The visual acuity in distinguishing closely spaced lines

The high accuracy in distinguishing gray and chroma

The spatial redundancy in images due to slowly changing content (correct)

What is the result of reducing high spatial frequency contents in an image?

Increased accuracy in distinguishing closely spaced lines

Improved visual acuity in distinguishing gray and chroma

Reduced spatial redundancy (correct)

Increased spatial redundancy

What is the purpose of chroma subsampling in JPEG?

To improve the visual acuity in distinguishing gray and chroma

To reduce the amount of data required to store an image (correct)

To reduce the spatial redundancy in an image

To increase the accuracy in distinguishing closely spaced lines

What do psychophysical experiments suggest about human perception of image quality?

Humans are less likely to notice the loss of high spatial frequency components (A) Signup and view all the answers

What is the typical block size used in the DCT transform coding method in JPEG?

8 × 8 (B) Signup and view all the answers

What is the primary reason for the spatial redundancy in images?

Much of the information in an image is repeated. (C) Signup and view all the answers

Which of the following statements is a direct consequence of Observation 1?

Much of the information in an image is repeated. (D) Signup and view all the answers

What is the main purpose of reducing high spatial frequency components in an image?

To reduce the spatial redundancy in the image. (C) Signup and view all the answers

Which of the following is a direct application of Observation 2?

Reducing high spatial frequency components in an image. (A) Signup and view all the answers

What is the main reason for using chroma subsampling in JPEG?

To take advantage of human visual system's limited acuity for color. (D) Signup and view all the answers