Subtraction

subtraction of 2 images More...

IPSDKIPLARITHMETIC_API image::ImagePtr	ipsdk::imaproc::arithm::subtractImgImg (const image::ImageConstPtr &pInImg1, const image::ImageConstPtr &pInImg2)
	Wrapper functions for subtraction of one image by another, pixel by pixel. More...
IPSDKIPLARITHMETIC_API void	ipsdk::imaproc::arithm::subtractImgImg (const image::ImageConstPtr &pInImg1, const image::ImageConstPtr &pInImg2, const image::ImagePtr &pOutImg)
	Wrapper functions for subtraction of one image by another, pixel by pixel. More...

Detailed Description

subtraction of 2 images

On output image values are given by:

Input and output images must have same size.

Here is an example of a subtraction operation applied to two 8-bits grey level images:

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	promoteBinary (_pOutImg, _pInImg1, _pInImg2, ipsdk::imaproc::ePromoteBinaryType::ePBT_UpperSigned)

Global Rule description

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

Example of Python code :

Example imports

import PyIPSDK
import PyIPSDK.IPSDKIPLArithmetic as arithm

Code Example

    # opening input images
    geometry = PyIPSDK.geometry2d(PyIPSDK.eImageBufferType.eIBT_Real32, 510, 509)
    inImg1 = PyIPSDK.loadRawImageFile(inputImg1Path, geometry)
    inImg2 = PyIPSDK.loadRawImageFile(inputImg2Path, geometry)
    
    # subtraction of image 1 by image 2
    outImg = arithm.subtractImgImg(inImg1, inImg2)

Example of C++ code :

Example informations

Associated library

IPSDKIPLArithmetic

Header file

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

Code Example

        // open input images
        ImageGeometryPtr pInputImageGeometry = geometry2d(inType, sizeX, sizeY);
        ImagePtr pInImg1 = loadRawImageFile(in1Path, *pInputImageGeometry);
        ImagePtr pInImg2 = loadRawImageFile(in2Path, *pInputImageGeometry);

        // Sample with a generated output image
        // ------------------------------------

        // compute subtraction for input images
        ImagePtr pAutoOutImg = subtractImgImg(pInImg1, pInImg2);

        // Sample with a provided output image
        // -----------------------------------

        // create output image
        ImageGeometryPtr pOutputImageGeometry = geometry2d(outType, sizeX, sizeY);
        boost::shared_ptr<MemoryImage> pOutImg(boost::make_shared<MemoryImage>());
        pOutImg->init(*pOutputImageGeometry);

        // compute subtraction of input images
        subtractImgImg(pInImg1, pInImg2, pOutImg);

See also

SubtractImgImgLvl1

SubtractImgImgLvl2

SubtractImgImgLvl3

Function Documentation

subtractImgImg() [1/2]

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

Wrapper functions for subtraction of one image by another, pixel by pixel.

Exceptions

ipsdk::processor::IPSDKBaseProcessingException

on failure

subtractImgImg() [2/2]

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

Wrapper functions for subtraction of one image by another, pixel by pixel.

Exceptions

ipsdk::processor::IPSDKBaseProcessingException

on failure