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Talk:Edge detection

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This is an old revision of this page, as edited by 4.243.97.155 (talk) at 19:46, 27 July 2006. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

No reference to the SUSAN edge detector? ALoopingIcon 07:53, 25 February 2006 (UTC)[reply]

In the practice of digital image enhancement, basing edge detection merely on numerical derivatives is too naive, and unrealistic. For each pixel of a digital image, one wants not only to decide if it is a candidate for membership in an "edge" but also to find the direction of that edge. [In particular, the edge direction is required for true sharpening]. One needs to analize a suitable collection of neighboring pixels (typically, those at horizontal or vertical distances up to 3)with respect to intensity as well as position. Although effective methods of doing this are not very difficult to develop, it seems that commercial software does not provide truly suitable implementations.

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