An Overview of IAS Image Compression & Streaming Technology

Transcript An Overview of IAS Image Compression & Streaming Technology

Image Access Solutions

An Overview of IAS Image Compression & Streaming Technology Clive Cook

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Outline

Introduction Technology Background Image Access Solution Summary

Introduction

• The problem, • Customers with very large geospatial data sets consisting of imagery whose file size’s are often in excess of 10 GB • They need to provide access to this imagery to their many field workers • • The field workers might only have access to narrow bandwidth networks (Satellite phones etc …) The solution, • Exelis Visual information Image Access Solution (IAS) • Pulls together existing technologies and concepts, • The Pull Approach • JPEG 2000 / JPIP

The Pull Approach

What is it?

• Compress and store data on the server side • Transmit only data the user requests – but allow access to all of the information in every image What are the benefits?

• Less storage space • Small communication link demands • Much less expensive than large server farms • Allows for the support of a large and disperse user base • Serve large image products over existing communication links – all the way down to hand held devices and radios (3G connections, satellite connections, etc …)

JPEG 2000 Overview

• Standards based, so multi client, eg … • IAS Viewer • ENVI Zoom • KDU Show • • ArcMap JPEG 2000 • Is an image compression standard and coding system • Superior compression performance, particularly at low bit rates • Lossless and lossy compression using wavelet transformation • Progressive transmission – after small part of whole image received, viewer can display a lower quality version of image, quality improves through download of more bits from source.

• Multi-layered and multi-resolution • Metadata allows for geolocated imagery

JPEG 2000 Compression

• Example: 8-bit RGB Colour Photo Raw Image: • 28701 cols x 13053 rows x 3 bands x 8-bit • 1072 MB original file size

JPEG 2000 Compression

• • Example: 8-bit RGB Colour Photo Raw Image: • Numerically Lossless: • Numerically Reversible • 608 MB • 1.76:1 compression (57%)

JPEG 2000 Compression

• • Example: 8-bit RGB Colour Photo Raw Image: • Numerically Lossless: • Numerically Reversible • 608 MB • • 1.76:1 compression (57%) Visually Lossless: • Lossy compression • 107 MB • 10:1 compression (10%)

Image Comparison

Numerically Lossless Visually Lossless

JPEG 2000 Overview

• JPIP streaming • JPEG 2000 Interactive Protocol • Is a compression streamlining protocol that works with JPEG 2000 to produce an image with the least bandwidth • Downloads only the requested part of the image • Allows for a quick viewing of a large image at low resolution, or a smaller part of the image at high resolution.

R4 image displayed (999KB / 1.8%)

– Original image = 13.5K x 13.5K x 24 bits/pixel (530MB) – JPEG 2000 compressed to 10:1 (53 MB)

IAS reduces the total data transmitted to 1,324 KB (2.4%) Transmission Time

Entire JPEG DCT File

200

164 min

150

JPEG2000 Data Shown

100 50 0

3.1

min

56 Kbps

6.1

min 6.9

sec

1.5 Mbps

55 sec 1 sec

10 Mbps

4 3 2 1 MB

Data Transfer

Image Access Solution

Image Access Solutions (IAS) is an image dissemination platform that allows you to deliver and visually exploit geospatial imagery data, when and where your users need it

Image Access Solutions

• • • • • Image Access Solutions (IAS) provides a client-server configuration for high-performance image compression, conversion, and delivery based on JPEG 2000 standards.

On the server, IAS provides image compression, conversion, streaming, and integration into Service-Orientated architectures. On the client side, IAS provides a high-performance, user-friendly interface for viewing and chipping streamed imagery.

These tools use wavelet compression technology to convert images to JPEG 2000 in either JP2 or Certified NITF file formats. The converted images can be requested and viewed on different platforms, regardless of screen size, processing capabilities, and bandwidth constraints.

IAS System

JPIP Streamer J2K Compressor Transcoder

IAS System - Server

• Compressor - Compresses TIFF and GeoTIFF data to JPEG2000 with support for multiple profiles to meet a variety of compression needs.

• Server Registry - A simple registry based on the Atom publishing protocol for registering datasets and disseminating available data, metadata and associations via HTTP or HTTPS.

• JPIP Streamer - Enables your application server to stream imagery via JPIP over HTTP or HTTPS to any JPIP-enabled viewer.

IAS System - Server

• IAS Web Coverage Service (WCS) - Provides standard WCS interfaces to create, register and retrieve imagery for clients that are not JPIP enabled • IAS Web Mapping Service (WMS) - Provides standard WMS interfaces to create, register and retrieve imagery for clients that are not JPIP enabled

IAS System - Client

• • • IAS Viewer • Freely available • • View data from any JPIP stream • View associated metadata from an IAS Server Small download using Java WebStart IAS Client Chipper • Additional cost plug-in to IAS Viewer • Save a ‘chip’ as a compliant NITF or GeoTIFF image at user-specified resolution Custom Clients • Access registered images through REST eg … using the netURL class in IDL

IAS System - Client

New Features

• Support for basic vector feature data • Register vector data (GeoJSON format) with server • Stream point, line or polygon features with imagery • IAS Viewer support streamed vector data • IAS Mobile viewer for Android • Zoom and Pan • Show co-ordinates • Available as an independent Android App or a component to enable existing Apps • Supports both phones and tablets

IAS System Specifications

•

IAS Server Version 2.1

Operating systems, • Red Hat 5.x (linux 2.x) • Windows XP, Windows 7 • • Solaris 10 Application Servers • Jboss 6.0.0 Final • • GlassFish 3.1.1

Java • • JAVA JDK 1.5+ Databases • PostgreSQL • Oracle • MySQL •

IAS Client Version 2.4

Operating systems, • Red Hat 5.x (linux 2.x) • Windows XP, Windows 7 • • Java Solaris 10 • JAVA JDK 1.5+

IAS Demo

http://iasdemo.exelisvis.com/iasdemo

Summary

• IAS provides immediate access and viewing of large imagery • Not constrained by bandwidth • Works over existing communication links to a variety of clients – from desktops to handhelds • IAS is based on open standards and can be deployed into a variety of enterprise architectures • IAS – Geospatial imagery where you need it, when you need it

Thank You

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