03 Sep 2012 to 03 Sep 2012
Traditional desktop image processing software was designed to work with a single or a few images at a time and could never scale to a large number of imagery. The integration of GIS techniques enabled image management to be scaled by many magnitudes in terms of number of images as well as efficiency.
The processing of imagery has also changed from a ‘push’ based model by which each input image is transformed through a set of processes with intermediate outputs, to a ‘pull’ based model where the output is defined and the system selects and processes only the required pixels. These new transactional image data management techniques enable image products to be created on-the-fly directly from the input imagery immediately after acquisition.
Using a GIS to produce imagery on the fly together with the ability to manage very large volumes of data means users do not have to wait for all the data to process in order to use what they need. They can view many images, zoom into any location and visualize the information that is there. This also allows users to quality check their work more quickly, so products that may take a long time – like an orthophoto project that used to take months to create – now can be produced immediately. Going from the traditional input – output model to a transactional model where all the processing is defined in a database and quickly accessed has changed the very manner in which images are managed.
This presentation will cover the latest techniques for managing and processing large volumes of imagery, using GIS.