fetch_coord ( Region : : : Rows, Columns )

Access the pixels of a region.

The operator fetch_coord returns the region data in the form of coordinate lists. The coordinates are sorted in the following order:

          (r1,c1) <= (r2,c2) := r1 < r2 oder r1 = r2 und r1 <= r2
fetch_coord returns the coordinates in the form of tuples. An empty region is passed as empty tuple.


Attention

Only one region may be passed.


Parameters

Region (input_object)
region -> object
This region is accessed.

Rows (output_control)
coordinates.y-array -> integer
Line numbers of the pixels in the region

Columns (output_control)
coordinates.x-array -> integer
Column numbers of the pixels in the region
Number of elements: Columns == Rows


Result

The operator fetch_coord normally returns the value TRUE. If more than one connection component is passed an exception is caused. The behavior in case of empty input (no input regions available) is set via the operator set_system(::'no_object_result',<Result>:).


Possible Predecessors

sobel_amp, threshold__, connection


Alternatives

fetch_chord


See also

copy_obj, store_coord



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