How do you think the new GigE standards will influence the machine vision industry?
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By Samuel Yu
Dust and moisture concerns have been replaced by hard drive crashes, insufficient backups and the inability to prove the authenticity of photos taken. The ability to safeguard image files can spell the difference between a conviction that stands up and a perpetrator being set free on the streets. For these very reasons, there are still some police departments around the world that trust their evidence to analog film today.
One other solution that has recently gained popularity is storing digital images to servers online, otherwise known as cloud servers. Images are taken from the memory card and uploaded to an online server, where access is restricted by a password granted to authorized users only. Once images are online, duplicate “master” copies are created, with the idea that the master images will always be available for comparison against any copies of the image. This certainly helps to alleviate concerns about longevity of the data, but does come at a hefty cost. It’s expensive to deploy, and usually comes with annual maintenance contracts. And ultimately, this still does not answer the question of “what could have happened to the image between the time it was taken and when it was uploaded?”
A BETTER SOLUTION?
The Japanese police recently announced the adoption of a new digital imaging solution for their evidence collection, based on the SD™ WORM memory technology developed by SanDisk Corp. They are deploying this new solution to crime scene investigators to document crime scenes, and to police officers for those occasions when they can witness and capture evidence of a crime in action. SD WORM digital storage overcomes the challenges of capturing and preserving critical photographic evidence while ensuring evidence integrity through tamper-proof storage.
WORM is an acronym for Write Once Read Many and WORM systems are designed to do just that: write data to the memory once for archival storage, and read it many times over the years. Traditionally, WORM products such as tape drives have been used to store and preserve transactions and records in datacenters for the financial and healthcare industries.
SD WORM builds on this concept by putting WORM features in the popular SD card format, creating a memory system capable of long-term data preservation and instant write protection, all in the size of a postage stamp. CSI photographers now have access to a portable WORM storage solution to meet their forensic and evidence collection requirements.