Viewing Conditions
The ideal amount of edge enhancement that is required to produce a pleasant and sharp-looking image, without losing too much detail, varies according to several factors. An image that is to be viewed from a nearer distance, at a larger display size, on a medium that is inherently more "sharp" or by a person with excellent eyesight will typically demand a finer or lesser amount of edge enhancement than an image that is to be shown at a smaller display size, further viewing distance, on a medium that is inherently softer or by a person with poorer eyesight.
For this reason, home cinema enthusiasts who invest in larger, higher quality screens often complain about the amount of edge enhancement present in commercially produced DVD videos, claiming that such edge enhancement is optimized for playback on smaller, poorer quality television screens, but the loss of detail as a result of the edge enhancement is much more noticeable in their viewing conditions.
Read more about this topic: Edge Enhancement
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