Local Extrema 3d

image =	localMaxima3dImg (inImg3d)
image =	localMinima3dImg (inImg3d)

Detailed Description

algorithm allowing to extract local extremum 3d from an image

This algorithm allows, given an input image InImg3d and a searched extrema type defined by InLocalExtremumType parameter, to compute a binary ouput image OutBinImg where all set pixels are local extrema.

This means that if a pixel is set in output image, all neighbor value respect one of following condition :

• neighbor value is lower in case of maxima search (or greater in case of minima search)
• neighbor value is equal and neighbor is also a extrema (plateau case with neighbor pixel set in output image)

This is illustrated in case of a 1d signal :

An example of local maxima extraction is illustrated in 2d case : see Local Extrema 2d.

Example of Python code :

Example imports

import PyIPSDK
import PyIPSDK.IPSDKIPLAdvancedMorphology as advmorpho

Code Example

    # opening of input image
    inImg = PyIPSDK.loadTiffImageFile(inputImgPath)
    
    # local maxima 3d computation
    outImg = advmorpho.localMaxima3dImg(inImg)

Example of C++ code :

Example informations

Header file

#include <IPSDKIPL/IPSDKIPLAdvancedMorphology/Processor/LocalExtrema3dImg/LocalExtrema3dImg.h>

Code Example

        // opening of input image
        ImagePtr pInImg = loadTiffImageFile(inputImgPath);
    
        // mark local maxima in input image
        ImagePtr pOutMaxImg = localMaxima3dImg(pInImg);

        // mark local minima in input image
        ImagePtr pOutMinImg = localMinima3dImg(pInImg);