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Image Access Solutions
An Overview of IAS Image Compression & Streaming Technology
Clive Cook
The information contained in this document pertains to software products and services that are subject to the controls of the Export Administration Regulations (EAR). The recipient is responsible for ensuring compliance to all applicable U.S. Export Control laws and regulations.
Outline
1. Introduction2. Technology Background3. Image Access Solution4. 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:
• 28701 cols x 13053 rows x 3 bands x 8-bit• 1072 MB original file size
•Numerically Lossless:• Numerically Reversible• 608 MB• 1.76:1 compression (57%)
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:
• 28701 cols x 13053 rows x 3 bands x 8-bit• 1072 MB original file size
•Numerically Lossless:• Numerically Reversible• 608 MB• 1.76:1 compression (57%)
• Visually Lossless:• Lossy compression• 107 MB• 10:1 compression (10%)
Example: 8-bit RGB Colour Photo• Raw Image:
• 28701 cols x 13053 rows x 3 bands x 8-bit• 1072 MB original file size
Image Comparison
Visually LosslessNumerically 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.
sub-frame enlargement with digital zoom
– Original image = 13.5K x 13.5K x 24 bits/pixel (530MB)– JPEG 2000 compressed to 10:1 (53 MB)
1
2
3
4
5
MB
DataTransfer
R4 image displayed (999KB / 1.8%)
R2 image sub-frame (295KB / 0.5%)
sub-frame enlargement digital zoomR0 image sub-frame (30KB / 0.06%)
Transmission Time
0
50
100
150
200
56 Kbps 1.5 Mbps 10 Mbps
Min
ute
s
Entire JPEG DCT File JPEG2000 Data Shown
164min
3.1min
6.1min
6.9sec
55sec
1sec
IAS reduces the total data transmitted to 1,324 KB (2.4%)
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
IAS ServerIAS Client
WMS
WCS
JPIP
Enterprise Viewer
Client SDK
GDAL
ImageIO
IAS Client Chipper
REST
Me
ssag
e M
an
ag
er
HTTP /HTTPS
IAS Registry
Administration
J2KCompressor
Transcoder
Discovery
Custom Clients
JPIPStreamer
IAS ServerIAS Client
WMS
WCS
JPIP
Enterprise Viewer
Client SDK
GDAL
ImageIO
IAS Client Chipper
REST
Me
ssag
e M
an
ag
er
HTTP /HTTPS
IAS Registry
Administration
J2KCompressor
Discovery
Custom Clients
JPIPStreamer
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• Solaris 10
•Java• JAVA JDK 1.5+
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
info@exelisvis.comClive.cook@exelisvis.comwww.exelisvis.com
© 2011 Exelis Visual Information Solutions, Inc.
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