iWallPercent

The maximum number of wall slices (expressed as a percent of the total length of the line) that are allowed. A line consists of wall slices and non-wall slices (see description of iWall). This field specifies that maximum number of wall slices (expressed as a percent of the total length of the line) that are allowed. Lines that have a wall percent that is larger than iMaxWallPercent will not be removed. For example, consider the line below that is 10 pixels in length, and 1 pixel in height in some places, and five pixels in height in other places.

Setting iMinLineLength to 10 pixels and iWall to four pixels will identify the line below as a candidate for removal. Note that the wall percent for this line is 60% (because six of ten line slices are walls). If iMaxWallPercent is 80 then the line will be removed (actually, the pixels marked as red will be removed). If iMaxWallPercent is 30, then the line will not be removed.