This enumeration specifies types of edge map operation.
IG_EDGE_OP_PREWITT | Prewitt. |
IG_EDGE_OP_ROBERTS | Roberts. |
IG_EDGE_OP_SOBEL | Sobel. |
IG_EDGE_OP_LAPLACIAN | Laplacian. |
IG_EDGE_OP_LOG | Laplacian of Gaussian. |
IG_EDGE_OP_HORIZONTAL | Horizontal. |
IG_EDGE_OP_VERTICAL | Vertical. |
IG_EDGE_OP_DIAG_POS_45 | Diagonal positive. |
IG_EDGE_OP_DIAG_NEG_45 | Diagonal negative. |