gen_gauss_pyramid
— Calculating a Gauss pyramid.
gen_gauss_pyramid(Image : ImagePyramid : Mode, Scale : )
The operator gen_gauss_pyramid
calculates a pyramid of
scaled down images. The scale by which the next image will be
reduced is determined by the parameter Scale
. For instance,
a value of 0.5 for Scale
will shorten the edge length of
Image
by 50%. This is exactly equivalent to the “normal”
pyramid.
The parameter Mode
determines the way of averaging. For a
more detailed description concerning this parameter see also
affine_trans_image
. In the case that Scale
is
equal 0.5 there are the additional modes 'min' and
'max' available. In this case the minimum or the maximum
of the four neighboring pixels is selected.
Please note that each level will be returned as an individual image,
i.e., as one iconic object, with one matrix and its own domain.
Single or multiple levels can be selected by using
select_obj
or copy_obj
, respectively.
Image
(input_object) (multichannel-)image →
object (byte / uint2 / real)
Input image.
ImagePyramid
(output_object) (multichannel-)image-array →
object (byte / uint2 / real)
Output images.
Number of elements: ImagePyramid > Image
Mode
(input_control) string →
(string)
Kind of filter mask.
Default value: 'weighted'
List of values: 'constant' , 'max' , 'min' , 'nearest_neighbor' , 'weighted'
Scale
(input_control) real →
(real)
Factor for scaling down.
Default value: 0.5
Suggested values: 0.2, 0.3, 0.4, 0.5, 0.6
Typical range of values: 0.001
≤
Scale
≤
0.9
Recommended increment: 0.1
gen_gauss_pyramid(Image,Pyramid,"weighted",0.5); count_obj(Pyramid,&num); for (i=1; i<=num; i++) { select_obj(Pyramid,&Single,i); disp_image(Single,WindowHandle); clear(Single); }
image_to_channels
,
count_obj
,
select_obj
,
copy_obj
zoom_image_size
,
zoom_image_factor
Foundation