entropy_gray entropy_gray EntropyGray EntropyGray entropy_gray (Operator)
Name
entropy_gray entropy_gray EntropyGray EntropyGray entropy_gray
Signature
def entropy_gray (regions image
def entropy_gray_s (regions image
Description
The operator entropy_gray entropy_gray EntropyGray EntropyGray EntropyGray entropy_gray Regions Regions Regions Regions regions regions
Entropy:
where
rel[i] histogram of relative gray value frequencies
i Gray value of input image (0..255)
and k Smallest possible gray value with sum(rel[i]) >= 0.5
Attention
Note that the operator entropy_gray entropy_gray EntropyGray EntropyGray EntropyGray entropy_gray Regions Regions Regions Regions regions regions Image Image Image Image image image
Execution Information
Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: global (may be called from any thread).
Automatically parallelized on tuple level.
Parameters
Regions Regions Regions Regions regions regions region(-array) → object HRegion HObject HRegion Hobject
Regions where the features are to be determined.
Image Image Image Image image image singlechannelimage → object HImage HObject HImage Hobject (byte)
Gray value image.
Entropy Entropy Entropy Entropy entropy entropy real(-array) → HTuple Sequence[float] HTuple Htuple (real) (double ) (double ) (double )
Information content (entropy) of the gray values.
Assertion:
0 <= Entropy && Entropy <= 8
Anisotropy Anisotropy Anisotropy Anisotropy anisotropy anisotropy real(-array) → HTuple Sequence[float] HTuple Htuple (real) (double ) (double ) (double )
Measure of the symmetry of gray value distribution.
Complexity
If F is the area of the region the runtime complexity is O(F + 255).
Result
The operator entropy_gray entropy_gray EntropyGray EntropyGray EntropyGray entropy_gray 2 (
H_MSG_TRUE )
if an
image with defined gray values is entered and the parameters are
correct. The behavior in case of empty input (no input images
available) is set via the operator
set_system(::'no_object_result',<Result>:) set_system("no_object_result",<Result>) SetSystem("no_object_result",<Result>) SetSystem("no_object_result",<Result>) SetSystem("no_object_result",<Result>) set_system("no_object_result",<Result>) set_system(::'empty_region_result',<Result>:) set_system("empty_region_result",<Result>) SetSystem("empty_region_result",<Result>) SetSystem("empty_region_result",<Result>) SetSystem("empty_region_result",<Result>) set_system("empty_region_result",<Result>)
Alternatives
select_gray select_gray SelectGray SelectGray SelectGray select_gray
See also
entropy_image entropy_image EntropyImage EntropyImage EntropyImage entropy_image gray_histo gray_histo GrayHisto GrayHisto GrayHisto gray_histo gray_histo_abs gray_histo_abs GrayHistoAbs GrayHistoAbs GrayHistoAbs gray_histo_abs fuzzy_entropy fuzzy_entropy FuzzyEntropy FuzzyEntropy FuzzyEntropy fuzzy_entropy fuzzy_perimeter fuzzy_perimeter FuzzyPerimeter FuzzyPerimeter FuzzyPerimeter fuzzy_perimeter
Module
Foundation