What is JPEG 2000 Robert Han ECE533 Final Project Presentation University of Wisconsin - Madison

Project Contents  JPEG2000 Background information  Introduction of KAKADU software  JPEG2000 image implementation – KAKADU software  JPEG VS JPEG2000 Performance comparison

 JPEG2000 Background information  Introduction of KAKADU software  JPEG2000 image implementation – KAKADU software  JPEG VS JPEG2000 Visual Performance Comparison

JPEG Background information  A new image-encoding standard that provides a feature set vital to many high end and emerging imaging applications.  Provides high compression with image quality superior to all existing standard encoding techniques.  Wavelet-based compression  Represent complex structures in the image  Store compressed data in hierarchical format  Compressing an extremely large amount of image data into a relatively small amount of compressed data  Compressed image can then be sent to a device in the resolution that best fits without additional storage overhead.  File structure flexibility - Could be used for a variety of applications such as  Internet, Digital Photography,  Medical Imaging, Wireless Imaging..

Main Differences JPEGJPEG2000  Created for natural images  Discrete Cosine Transform algorithm  File extension :.jpg or.jpeg  Currently applicable to most of applications  Web, imaging software, office..  Created for computer generated images  Discrete Wavelet Transform algorithm  File extention :.jp2,.jpx,.jpf,.mj2  Currently NOT widely used Entropy encoding Source image data Forward transform Quantization Compressed image data Basic Architecture of standard

 JPEG2000 Background information  Introduction of KAKADU software  JPEG2000 image implementation – KAKADU software  JPEG VS JPEG2000 Visual Performance Comparison

The KAKADU software A complete implementation of the JPEG2000 standard Part 1. A Comprehensive implementation for several of the most useful features from Part 2 Provides a solid foundation for a range of commercial and non-commercial applications

The KAKADU software Image and volume compression Image and volume decompression/rendering Transcoding between related representation Interactive rendering applications Client-server applications Digital Cinema applications

The KAKADU software

 JPEG2000 Background information  Introduction of KAKADU software  JPEG2000 image implementation – KAKADU software  JPEG VS JPEG2000 Visual Performance Comparison

JPEG2000 Implementation Reducing layers Original Image JPEG2000 Image With 5 layers JPEG2000 Image With 1 layer

JPEG2000 Implementation Flips Original Image Horizontal flipVertical flip

JPEG2000 Implementation Single component mode Original Image First componentLast component

JPEG2000 Implementation Adding metadata Adding codestream

 JPEG2000 Background information  Introduction of KAKADU software  JPEG2000 image implementation – KAKADU software  JPEG VS JPEG2000 Visual Performance comparison

Visual Performance Comparison Color Image JPEG 100% quality File size : 247kb JPEG 50% quality File size : 34.7kb JPEG 0% quality File size : 23.4kb JPEG2000, 10:1 File size : 76.8kb JPEG2000, 50:1 File size : 15.4kb JPEG2000, 100:1 File size : 7.78kb Png format File size : 439kb

Jpeg2000, 100:1File size : 4.54kbJpeg2000, 50:1File size : 24.5kbJpeg2000, 10:1File size : 156kb Jpeg, 0% qualityFile size : 41.7kbJpeg, 50% qualityFile size : 79.1kbJpeg, 100% qualityFile size : 193kb Grayscale Image Visual Performance Comparison

Scanned Document Saved as png format Scanned at 300 dpi Saved as jpeg format Scanned at 150 dpi Saved as Jpeg2000 format Scanned at 150 dpi jpeg2000 format jpeg format Visual Performance Comparison

Cartoon Image- Created by Photoshop Jpeg2000, 100:1File size : 54.6kbJpeg2000, 50:1File size : 114kbJpeg2000, 10:1File size : 243kb Jpeg, 0% qualityFile size : 77.8kbJpeg, 50% qualityFile size : 109kbJpeg, 100% qualityFile size : 278kb JPEG2000 imageJPEG image Visual Performance Comparison

Conclusion JPEG2000 standard shows improved features over JPEG standard JPEG2000 reduced the image size while enhanced the image quality JPEG2000 is not yet widely used but getting more attention It is expected that JPEG2000 standard will become the one of most widely used image compression standard in very near future

Questions?