Value

Meaning

EDG_SOBEL_VERT

[$0101] Detect the vertical edges

EDG_SOBEL_HORZ

[$0102] Detect the horizontal edges

EDG_SOBEL_ALL

[$0103] Detect horizontal & vertical edges

EDG_PREWITT_VERT

[$0201] Detect the vertical edges

EDG_PREWITT_HORZ

[$0202] Detect the horizontal edges

EDG_PREWITT_ALL

[$0203] Detect horizontal & vertical edges

EDG_LAPLACE_1

[$0301] Detect vertical & horizontal edges

EDG_LAPLACE_2

[$0302] Detect general edges

EDG_LAPLACE_3

[$0303] Detect general edges. (The filter used for this option is different than the filter used for the EDG_LAPLACE_2 filter.)

EDG_LAPLACE_DIAG

[$0304] Detect the diagonal edges

EDG_LAPLACE_HORZ

[$0305] Detect the horizontal edges

EDG_LAPLACE_VERT

[$0306] Detect the vertical edges

EDG_GRADIENT_N

[$0401] Detect north edges

EDG_GRADIENT_NE

[$0402] Detect north east edges

EDG_GRADIENT_E

[$0403] Detect east edges

EDG_GRADIENT_SE

[$0404] Detect south east edges

EDG_GRADIENT_S

[$0405] Detect south edges

EDG_GRADIENT_SW

[$0406] Detect south west edges

EDG_GRADIENT_W

[$0407] Detect west edges

EDG_GRADIENT_NW

[$0408] Detect north west edges