monotony ( Image : ImageMonotony : : )

Calculating the monotony operation.

The operator monotony calculates the monotony operator. Thereby the points which are strictly smaller than the current grayvalue will be counted in the 8 neighborhood. This number will be entered into the output imaged.

If there is a strict maximum, the value 8 is returned; in case of a minimum or a plateau, the value 0 will be returned. A ridge or a slope will return the corresponding intermediate values.

The monotony operator is often used to prepare matching operations as it is invariant with regard to lightness modifications.


Parameters

Image (input_object)
image(-array) -> object
Input image.

ImageMonotony (output_object)
image(-array) -> object
Result of the monotony operator.
Number of elements: ImageMonotony == Image


Example
/* searching the strict maximums */
gauss__(Image,&Gauss,5);
monotony(Gauss,&Monotony);
threshold__(Monotony,Maxima,8.0,8.0);

Possible Predecessors

gauss__, median, mean__, smooth__, invert


Possible Successors

threshold__, match__, disp_image


Alternatives

local_max, topographic_sketch, corner_response__



Copyright © 1996-1997 MVTec Software GmbH