Computation of L1 (taxicab) norm of two images algorithm. More...

IPSDKIPLARITHMETIC_API void	ipsdk::imaproc::arithm::l1Norm2Img (const image::ImageConstPtr &pInImg1, const image::ImageConstPtr &pInImg2, const image::ImagePtr &pOutImg)
	wrapper function for Computation of L1 (taxicab) norm of two images More...

IPSDKIPLARITHMETIC_API image::ImagePtr	ipsdk::imaproc::arithm::l1Norm2Img (const image::ImageConstPtr &pInImg1, const image::ImageConstPtr &pInImg2)
	wrapper function for Computation of L1 (taxicab) norm of two images More...

Detailed Description

Computation of L1 (taxicab) norm of two images algorithm.

This algorithm allows to compute L1 norm (taxicab norm) of two images. Given two input images $InImg1$ and $InImg2$ , output image values are defined by :

$OutImg[i] = \lvert InImg1[i] \rvert + \lvert InImg2[i] \rvert$

Here is an example of a L1 norm computation applied to two floating point grey level input images :

See also: http://en.wikipedia.org/wiki/Norm_%28mathematics%29#Euclidean_norm

Attributes description

Attribute description for algorithm :

Name	ToolTip	Default Initializer
ipsdk::imaproc::attr::InImg1	[Input] First image for processing operation	X
ipsdk::imaproc::attr::InImg2	[Input] Second image for processing operation	X
ipsdk::imaproc::attr::OutImg	[Output] image for processing operation	promoteUnary (_pOutImg, _pInImg1, ipsdk::imaproc::ePromoteUnaryType::ePUT_UpperUnsigned)

Global Rule description

Global rule description for algorithm :
ipsdk::imaproc::matchSize (_pInImg1,_pInImg2,_pOutImg) &&
ipsdk::imaproc::matchBufferType (_pInImg1,_pInImg2)

Example of Python code :

Example imports

import PyIPSDK

import PyIPSDK.IPSDKIPLArithmetic as arithm

Code Example

    # opening of input image
    inImg1 = PyIPSDK.loadTiffImageFile(inputImg1Path)
    inImg2 = PyIPSDK.loadTiffImageFile(inputImg2Path)
    
    # computation of L1 norm of the 2 input images
    outImg = arithm.l1Norm2Img(inImg1, inImg2)

Example of C++ code :

Example informations

Associated library

IPSDKIPLArithmetic

Header file

#include <IPSDKIPL/IPSDKIPLArithmetic/Processor/L1Norm2Img/L1Norm2Img.h>

Code Example

    // opening input image
    ImagePtr pInImg = loadTiffImageFile(inputImgPath);
    // compute gradient on input image
    GradientXYImg gradientXY = gaussianGradient2dImg(pInImg, 3.0f);
    // compute norm on previous gradients
    ImagePtr pOutImg = l1Norm2Img(gradientXY._pXGradImg, gradientXY._pYGradImg);

See also: L1Norm2ImgLvl1; L1Norm2ImgLvl2; L1Norm2ImgLvl3

Function Documentation

◆ l1Norm2Img() [1/2]

IPSDKIPLARITHMETIC_API void ipsdk::imaproc::arithm::l1Norm2Img	(	const image::ImageConstPtr &	pInImg1,
		const image::ImageConstPtr &	pInImg2,
		const image::ImagePtr &	pOutImg
	)

wrapper function for Computation of L1 (taxicab) norm of two images

Exceptions

ipsdk::processor::IPSDKBaseProcessingException on failure

◆ l1Norm2Img() [2/2]

IPSDKIPLARITHMETIC_API image::ImagePtr ipsdk::imaproc::arithm::l1Norm2Img	(	const image::ImageConstPtr &	pInImg1,
		const image::ImageConstPtr &	pInImg2
	)

wrapper function for Computation of L1 (taxicab) norm of two images

Exceptions

ipsdk::processor::IPSDKBaseProcessingException on failure