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Originally posted by SeekerLou
reply to post by nofear39
Please see last edit ... You are quick
Thanks ... You just keep looking... More and more are seeing these things... I've seen several times but I'm 50+ ...am sure you'll have many chances to see ....just get out and scout!
Originally posted by lacrimosa
theres a pretty tidy rectangle around it. wonder how that got there.edit on 23-4-2012 by lacrimosa because: (no reason given)
Those who use the World Wide Web may be familiar with the irregularities known as compression artifacts that appear in JPEG images, which may take the form of noise around contrasting edges (especially curves and corners), or blocky images, commonly known as 'jaggies'. These are due to the quantization step of the JPEG algorithm. They are especially noticeable around sharp corners between contrasting colors (text is a good example as it contains many such corners). The analogous artifacts in MPEG video are referred to as mosquito noise, as the resulting "edge busyness" and spurious dots, which change over time, resemble mosquitoes swarming around the object.
These artifacts can be reduced by choosing a lower level of compression; they may be eliminated by saving an image using a lossless file format, though for photographic images this will usually result in a larger file size. The images created with ray-tracing programs have noticeable blocky shapes on the terrain. Certain low-intensity compression artifacts might be acceptable when simply viewing the images, but can be emphasized if the image is subsequently processed, usually resulting in unacceptable quality.....