Autotek autocad raster design 2010 ユーザーズマニュアル

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Highpass Filter #3 weighs side to side and top and bottom neighbors more
heavily than diagonal neighbors.

You can use these filters to enhance edges so you can easily identify boundaries
and property lines. You can also use them for object extraction or object
recognition by higher-level algorithms.

Raster Design supports the following edge enhancements filters:

 (page 110)

 (page 110)

 (page 111)

 (page 111)

You can use these filters to shift the image by one pixel and subtract the shifted
image from the original.

Raster Design uses the following shift and difference edge enhancements
filters:

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Vertical enhances vertical edges composed of black-to-white transitions.

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Horizontal enhances horizontal edges composed of black-to-white
transitions.

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Vertical and Horizontal combines operation of both vertical and horizontal
edge enhancements.

You can use these filters to enhance the image in all directions. These filters
enhance all edges that are composed of black-to-white transitions by making
them white.

110 | Chapter 6   Modifying Images