entropy_imageentropy_imageEntropyImageEntropyImageentropy_image (算子名称)
名称
entropy_imageentropy_imageEntropyImageEntropyImageentropy_image — Calculate the entropy of gray values within a rectangular window.
参数签名
描述
entropy_imageentropy_imageEntropyImageEntropyImageEntropyImageentropy_image calculates the entropy of gray values in the
image ImageImageImageImageimageimage within a rectangular mask of size
(HeightHeightHeightHeightheightheight, WidthWidthWidthWidthwidthwidth). The resulting image is
returned in ImageEntropyImageEntropyImageEntropyImageEntropyimageEntropyimage_entropy, in which the entropy is
multiplied by 32. If the parameters HeightHeightHeightHeightheightheight and
WidthWidthWidthWidthwidthwidth are even, they are changed to the next larger odd
value. At the image borders the gray values are mirrored.
注意
Note that filter operators may return unexpected results if
an image with a reduced domain is used as input. Please refer to the
chapter 过滤器.
运行信息
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Automatically parallelized on tuple level.
- Automatically parallelized on channel level.
- Automatically parallelized on domain level.
参数表
ImageImageImageImageimageimage (input_object) (multichannel-)image(-array) → objectHImageHObjectHImageHobject (byte)
Image for which the entropy is to be calculated.
ImageEntropyImageEntropyImageEntropyImageEntropyimageEntropyimage_entropy (output_object) (multichannel-)image(-array) → objectHImageHObjectHImageHobject * (byte)
Entropy image.
WidthWidthWidthWidthwidthwidth (input_control) extent.x → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Width of the mask in which the entropy is calculated.
Default:
9
Suggested values:
3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25
Restriction:
3 <= Width && odd(Width)
HeightHeightHeightHeightheightheight (input_control) extent.y → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Height of the mask in which the entropy is calculated.
Default:
9
Suggested values:
3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25
Restriction:
3 <= Height && odd(Height)
例程 (HDevelop)
read_image(Image,'fabrik')
dev_display(Image)
entropy_image(Image,Entropy,9,9)
dev_display(Entropy)
例程 (C)
read_image(&Image,"fabrik");
disp_image(Image,WindowHandle);
entropy_image(Image,&Entropy,9,9);
disp_image(Entropy,WindowHandle);
例程 (HDevelop)
read_image(Image,'fabrik')
dev_display(Image)
entropy_image(Image,Entropy,9,9)
dev_display(Entropy)
例程 (HDevelop)
read_image(Image,'fabrik')
dev_display(Image)
entropy_image(Image,Entropy,9,9)
dev_display(Entropy)
例程 (HDevelop)
read_image(Image,'fabrik')
dev_display(Image)
entropy_image(Image,Entropy,9,9)
dev_display(Entropy)
结果
entropy_imageentropy_imageEntropyImageEntropyImageEntropyImageentropy_image returns 2 (
H_MSG_TRUE)
if all parameters are correct.
If the input is empty the behavior can be set via
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>). If
necessary, an exception is raised.
可能的后置算子
disp_imagedisp_imageDispImageDispImageDispImagedisp_image
可替代算子
entropy_grayentropy_grayEntropyGrayEntropyGrayEntropyGrayentropy_gray
参考其它
energy_gaborenergy_gaborEnergyGaborEnergyGaborEnergyGaborenergy_gabor,
entropy_grayentropy_grayEntropyGrayEntropyGrayEntropyGrayentropy_gray
模块
Foundation