interjacentInterjacentInterjacentinterjacentinterjacent🔗

Short description🔗

interjacentInterjacentInterjacentinterjacentinterjacent — Partition the image plane using given regions.

Warning🔗

interjacentInterjacent is obsolete and is only provided for reasons of backward compatibility.

Signature🔗

interjacent( region Region, out region RegionInterjacent, string Mode )

Description🔗

interjacentInterjacent partitions the image plane using the regions given in Regionregionregion. The result is a region containing the extracted separating lines. The following modes of operation can be used:

'medial_axis'"medial_axis" This mode is used for regions that do not touch or overlap. The operator will find separating lines between the regions which partition the background evenly between the input regions. This corresponds to the following calls:
- Example: complement('full',Region,Tmp)
  
  skeleton(Tmp,Result)
'border'"border" If the input regions do not touch or overlap this mode is equivalent to boundary(Region,Result), i.e., it replaces each region by its boundary. If regions are touching they are aggregated into one region. The corresponding output region then contains the boundary of the aggregated region, as well as the one pixel wide separating line between the original regions. This corresponds to the following calls:
- Example: boundary(Region,Tmp1,'inner')
  
  union1(Tmp1,Tmp2)
  
  skeleton(Tmp2,Result)
'mixed'"mixed" In this mode the operator behaves like the mode 'medial_axis'"medial_axis" for non-overlapping regions. If regions touch or overlap, again separating lines between the input regions are generated on output, but this time including the “touching line” between regions, i.e., touching regions are separated by a line in the output region. This corresponds to the following calls:
- Example: erosion1(Region,Mask,Tmp1,1)
  
  union1(Tmp1,Tmp2)
  
  complement(full,Tmp2,Tmp3)
  
  skeleton(Tmp3,Result)
where Mask denotes the following “cross mask”:

\[\begin{eqnarray*} \begin{array}{ccc} & \times & \\ \times & \times & \times \\ & \times & \end{array} \end{eqnarray*}\]

Execution information🔗

Execution information

Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: global (may be called from any thread).
Processed without parallelization.

Parameters🔗

Regionregionregion (input_object) region(-array) → objectHObjectHRegionHObjectHobject

Regions for which the separating lines are to be determined.

RegionInterjacentregionInterjacentregion_interjacent (output_object) region → objectHObjectHRegionHObjectHobject *

Output region containing the separating lines.

Modemodemode (input_control) string → (string)HTuple (HString)HTuple (string)strHtuple (char*)

Mode of operation.

Default: 'mixed'"mixed"
List of values: 'border', 'medial_axis', 'mixed'"border", "medial_axis", "mixed"

Example🔗

(HDevelop)

read_image(Image,'forest_air1')
mean_image(Image,Mean,31,31)
dyn_threshold(Image,Mean,Seg,20,'light')
interjacent(Seg,Graph,'medial_axis')
dev_display(Graph)

(C)

read_image(&Image,"forest_air1")\;
mean_imae(Image,&Mean,31,31)\;
dyn_threshold(Image,Mean,&Seg,20,"light")\;
interjacent(Seg,&Graph,"medial_axis")\;
disp_region(Graph,WindowHandle)\;

Result🔗

interjacentInterjacent always returns the value 2 (H_MSG_TRUE). The behavior in case of empty input (no regions given) can be set via set_system('no_object_result',<Result>), the behavior in case of an empty input region via set_system('empty_region_result',<Result>), and the behavior in case of an empty result region via set_system('store_empty_region',<'true'/'false'>). If necessary, an exception is raised.

Combinations with other operators🔗

Combinations

Possible predecessors

thresholdThreshold, connectionConnection, regiongrowingRegiongrowing, pouringPouring

Possible successors

select_shapeSelectShape, disp_regionDispRegion

Module🔗

Foundation