Lecture 19 Figures from Gonzalez and Woods, Digital Image Processing, Second Edition, 2002.

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Presentation transcript:

Lecture 19 Figures from Gonzalez and Woods, Digital Image Processing, Second Edition, 2002.

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.

Chapter 8 Image Compression

Some Definitions

Chapter 8 Image Compression

Chapter 8 Image Compression

Optimal Predictors

Four Linear Predictors

Chapter 8 Image Compression

Optimal Quantization

Chapter 8 Image Compression

Chapter 8 Image Compression

Chapter 8 Image Compression

Chapter 8 Image Compression

Chapter 8 Image Compression

Transform Coding

Chapter 8 Image Compression

Common Transforms

Chapter 8 Image Compression

Chapter 8 Image Compression

Chapter 8 Image Compression