ETcVnContourRetrievalMode
Offers retrieval modes for a contour search.
Syntax
Definition:
TYPE ETcVnContourRetrievalMode :
(
TCVN_CRM_EXTERNAL := 0,
TCVN_CRM_LIST := 1,
TCVN_CRM_CONNECTED_COMPONENTS := 2,
TCVN_CRM_TREE := 3,
TCVN_CRM_FLOODFILL := 4
)DINT;
END_TYPE
Values
|
Name |
Description |
|---|---|
|
TCVN_CRM_EXTERNAL |
Returns only external contours. |
|
TCVN_CRM_LIST |
Returns all found contours, not considering their hierarchy. |
|
TCVN_CRM_CONNECTED_COMPONENTS |
Returns all contours with a 2-level hierarchy (External contours are assigned level 0, internal contours level 1). |
|
TCVN_CRM_TREE |
Returns all contours and their full hierarchy. |
|
TCVN_CRM_FLOODFILL |
Returns the found contours using a floodfill algorithm (only available for DINT images). |
Further information
This type specifies how the contour hierarchy is to be taken into account in the contour search.
- TCVN_CRM_EXTERNAL
Only the outer contours are returned; inner contours are not taken into account.
- TCVN_CRM_LIST
All contours are returned. The contour hierarchy is not taken into account.
- TCVN_CRM_CONNECTED_COMPONENTS
All contours are returned, and a 2-level hierarchy is created. In the graphic, all contours at level 1 are shown in red, level 2 is shown in green. It is evident that the next inner contour after a level 2 contour is again on level 1.
- TCVN_CRM_TREE
All contours are returned, and a hierarchy is created based on a tree structure. In the image level 1 is red, level 2 green, level 3 blue and level 4 yellow.