We held our regular monthly meeting at Roseville's R-Stac on February 4, 2003. Eight members were present. The DIG SIG is about the technical and practical aspects of the Digital Image.
The meeting opened with a discussion on "Long Term Storage" of digital images that are stored on computers todays. This was prompted by a recent article in the local paper about 1976 Mars image files that could not be opened or read by today's computers. Most members believe that the CD-Rom is the best choice for today. It was also agreed that computer generated archival paper prints, properly stored, was another method. But with the fast pace that storage devices are changing and with many formats being proprietary, there seems to be no good answer for the electronic storage of images that could be acessed in the future.
There was a short presentation on the "Base 2 " numbering system that is used to change the analog signal from CCD and CMOS pixels into a digital pixel. Since the digital Pixel is represented as a number in the digital system of imagery used today, image enhancement software makes it possible to manipulate these numbers, changing the digital image.
Lastly, several members passed around some digital images that they had taken.
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Jim Lockhart