| Operators |
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.
Input image.
Output images.
Number of elements: ImagePyramid > Image
Kind of filtermask.
Default value: 'weighted'
List of values: 'constant', 'max', 'min', 'nearest_neighbor', 'weighted'
Factor for scaling down.
Default value: 0.5
Suggested values: 0.2, 0.3, 0.4, 0.5, 0.6
Typical range of values: 0.1 ≤ Scale ≤ 0.9
Minimum increment: 0.01
Recommended increment: 0.1
Restriction: 0.1 < Scale && Scale < 0.9
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
| Operators |