Figures%20from%20Gonzalez%20and%20Woods,%20Digital%20Image%20Processing,%20Second%20Edition,%202002. - PowerPoint PPT Presentation
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Figures%20from%20Gonzalez%20and%20Woods,%20Digital%20Image%20Processing,%20Second%20Edition,%202002.
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Title: Lecture 19 Author: cse Last modified by: cse Created Date: 11/28/2005 8:41:20 PM Document presentation format: On-screen Show Company: psu Other titles – PowerPoint PPT presentation
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Title: Figures%20from%20Gonzalez%20and%20Woods,%20Digital%20Image%20Processing,%20Second%20Edition,%202002.
1
Lecture 19
- Figures from Gonzalez and Woods, Digital Image
Processing, Second Edition, 2002.
2
Lossy Compression
- Error free compression loses no information, it
just looks for a more optimal way to store it.
Compression is at best about 3-to-1. - Lossy compression imposes a (tolerable)
distortion to store the image more efficiently.
We are actually giving up something. - Compression can be 100-to-1 and indistinguishable
from originals at 10-to-1 or even 50-to-1.
3
Chapter 8 Image Compression
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Some Definitions
5
Chapter 8 Image Compression
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Chapter 8 Image Compression
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Optimal Predictors
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Four Linear Predictors
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Chapter 8 Image Compression
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Optimal Quantization
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Chapter 8 Image Compression
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Chapter 8 Image Compression
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Chapter 8 Image Compression
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Chapter 8 Image Compression
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Chapter 8 Image Compression
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Transform Coding
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Chapter 8 Image Compression
18
Common Transforms
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Chapter 8 Image Compression
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Chapter 8 Image Compression
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Chapter 8 Image Compression
