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log_imagelog_imageLogImagelog_imageLogImageLogImage (Operator)


log_imagelog_imageLogImagelog_imageLogImageLogImage — Calculate the logarithm of an image.


log_image(Image : LogImage : Base : )

Herror log_image(const Hobject Image, Hobject* LogImage, const char* Base)

Herror T_log_image(const Hobject Image, Hobject* LogImage, const Htuple Base)

Herror log_image(Hobject Image, Hobject* LogImage, const HTuple& Base)

HImage HImage::LogImage(const HTuple& Base) const

HImageArray HImageArray::LogImage(const HTuple& Base) const

void LogImage(const HObject& Image, HObject* LogImage, const HTuple& Base)

HImage HImage::LogImage(const HTuple& Base) const

HImage HImage::LogImage(const HString& Base) const

HImage HImage::LogImage(const char* Base) const

void HOperatorSetX.LogImage(
[in] IHUntypedObjectX* Image, [out] IHUntypedObjectX*LogImage, [in] VARIANT Base)

IHImageX* HImageX.LogImage([in] VARIANT Base)

static void HOperatorSet.LogImage(HObject image, out HObject logImage, HTuple baseVal)

HImage HImage.LogImage(HTuple baseVal)

HImage HImage.LogImage(string baseVal)


log_imagelog_imageLogImagelog_imageLogImageLogImage calculates the logarithm to the base BaseBaseBaseBaseBasebaseVal of an input image ImageImageImageImageImageimage and stores the result in the image LogImageLogImageLogImageLogImageLogImagelogImage. If ImageImageImageImageImageimage contains gray values outside the valid domain of the logarithm function, i.e., <= 0, the corresponding gray values in LogImageLogImageLogImageLogImageLogImagelogImage are set to 0.


log_imagelog_imageLogImagelog_imageLogImageLogImage can be executed on an OpenCL device for byte, int1, int2, uint2, int4, and real images. Note that the results of the OpenCL code may vary from the results produced by the CPU.



ImageImageImageImageImageimage (input_object)  (multichannel-)image(-array) objectHImageHImageHImageHImageXHobject (byte* / int1* / uint2* / int2* / int4* / int8 / real*) *allowed for compute devices

Input image.

LogImageLogImageLogImageLogImageLogImagelogImage (output_object)  (multichannel-)image(-array) objectHImageHImageHImageHImageXHobject * (real)

Output image.

BaseBaseBaseBaseBasebaseVal (input_control)  number HTupleHTupleHTupleVARIANTHtuple (string / integer / real) (string / int / long / double) (HString / Hlong / double) (char* / Hlong / double) (BSTR / Hlong / double) (char* / Hlong / double)

Base of the logarithm.

Default value: 'e' "e" "e" "e" "e" "e"

Suggested values: 'e'"e""e""e""e""e", 2, 10

See also

pow_imagepow_imagePowImagepow_imagePowImagePowImage, exp_imageexp_imageExpImageexp_imageExpImageExpImage



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