select_lines1 ( : : RowBeginIn, ColBeginIn, RowEndIn, ColEndIn, Feature, Operation, Min, Max : RowBeginOut, ColBeginOut, RowEndOut, ColEndOut )
Select lines according to various criteria.
The operator select_lines1 chooses lines according to
various criteria. For every input line the indicated features
(Feature) are calculated. If each
(Operation = 'and') or at least one
(Operation = 'or') of the calculated features is within
the given limits (Min,Max) the line is
transferred into the output.
Condition: Min_i <= Feature_i(Linie) <= Max_i
Possible values for Feature:
- 'length' (Euclidean) length of the line
- 'row' Line index of the center
- 'column' Column index of the center
- 'phi' Orientation of the line (-pi/2 < phi <= pi/2)
Attention
If only one feature is used the value of Operation is
meaningless. Several features are processed according to the
sequence in which they are passed.
Parameters
RowBeginIn (input_control)
|
line.begin.y-array -> integer
|
Row coordinates of the starting points of the
input lines. |
ColBeginIn (input_control)
|
line.begin.x-array -> integer
|
Column coordinates of the starting points of the
input lines. |
RowEndIn (input_control)
|
line.end.y-array -> integer
|
Row coordinates of the ending points of the
input lines. |
ColEndIn (input_control)
|
line.end.x-array -> integer
|
Column coordinates of the ending points of the
input lines. |
Feature (input_control)
|
string(-array) -> string
|
Features to be used for selection. |
Default value: 'length' |
List of values: 'length', 'row', 'column', 'phi' |
Operation (input_control)
|
string -> string
|
Desired combination of the features. |
Default value: 'and' |
List of values: 'and', 'or' |
Min (input_control)
|
string(-array) -> string / integer / real
|
Lower limits of the features or 'min'. |
Default value: 'min' |
Max (input_control)
|
string(-array) -> string / integer / real
|
Upper limits of the features or 'max'. |
Default value: 'max' |
RowBeginOut (output_control)
|
line.begin.y-array -> integer
|
Row coordinates of the starting points of the
output lines. |
ColBeginOut (output_control)
|
line.begin.x-array -> integer
|
Column coordinates of the starting points of the
output lines. |
RowEndOut (output_control)
|
line.end.y-array -> integer
|
Row coordinates of the ending points of the
output lines. |
ColEndOut (output_control)
|
line.end.x-array -> integer
|
Column coordinates of the ending points of the
output lines. |
Result
The operator select_lines1 returns the value TRUE if the
parameter values are correct. Otherwise an exception is raised.
Possible Predecessors
sobel_amp,
edges__,
threshold__,
hysteresis_threshold__,
split_skeleton1,
split_skeleton2
Possible Successors
set_line_width,
disp_line
Alternatives
line_orientation,
line_position,
select_lines2
See also
select_lines2,
select_longest_lines,
detect_edges1,
select_shape
Copyright © 1996-1997 MVTec Software GmbH