문서

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모폴로지 연산

팽창, 침식, 재구성 및 기타 모폴로지 연산 수행

함수

bwhitmissBinary hit-miss operation
bwmorph이진 영상에 대한 모폴로지 연산
bwulterodeUltimate erosion
bwareaopen이진 영상에서 크기가 작은 객체 제거
imbothatBottom-hat filtering
imclearborderSuppress light structures connected to image border
imcloseMorphologically close image
imdilate영상 팽창
imerode영상 침식
imextendedmaxExtended-maxima transform
imextendedminExtended-minima transform
imfill영상 영역과 구멍 채우기
imhmaxH-maxima transform
imhminH-minima transform
imimposeminImpose minima
imopenMorphologically open image
imreconstructMorphological reconstruction
imregionalmaxRegional maxima
imregionalminRegional minima
imtophatTop-hat filtering
watershedWatershed transform
conndefCreate connectivity array
iptcheckconnCheck validity of connectivity argument
applylutNeighborhood operations on binary images using lookup tables
bwlookup Nonlinear filtering using lookup tables
makelutCreate lookup table for use with bwlookup

객체

strelMorphological structuring element
offsetstrelMorphological offset structuring element

예제 및 방법

Dilate an Image to Enlarge a Shape

Dilation adds pixels to boundary of an object. Dilation makes objects more visible and fills in small holes in the object.

Erode an Image To Remove Thin Lines

Erosion removes pixels from the boundary of an object. Erosion removes islands and small objects so that only substantive objects remain.

Operations That Combine Dilation and Erosion

Combine dilation and erosion to remove small objects from an image and smooth the border of large objects.

개념

Morphological Dilation and Erosion

Dilation adds pixels to the boundary of objects in an image. Erosion removes pixels from object boundaries.

Structuring Elements

A structuring element defines the neighborhood used to process each pixel. It influences the size and shape of objects you want to process in the image.

Understanding Morphological Reconstruction

Morphological reconstruction is useful to extract marked objects from an image without changing the object size or shape.

Skeletonization

The process of skeletonization reduces all objects in an image to lines, without changing the essential structure of the image.

Find Object Perimeters

The perimeter, or boundary, of objects in a binary image consists of all pixels at the interface of the object and the background.

Correct Nonuniform Background Illumination and Analyze Foreground Objects

This example shows how to enhance an image as a preprocessing step before analysis.

Lookup Table Operations

A lookup table is a vector in which each element represents the different permutations of pixels in a neighborhood. Lookup tables are useful for custom erosion and dilation operations.

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