I used regionprops to find euler number and area. How do i get area of euler number 0

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Chok Chuan
Chok Chuan 2015-5-4
评论： Chok Chuan 2015-5-6
clc
clear all
close all
I = imread('GGGG.tif');
originalImage=rgb2gray(I);
labeledImage = bwlabel(originalImage);
blobMeasurements = regionprops(labeledImage, originalImage, 'EulerNumber','Area');
numberOfBlobs = size(blobMeasurements, 1);
I used regionprops to get euler number and area of a picture. What is the code to get the area of euler number 0 and store it in another variable
  2 个评论
Image Analyst
Image Analyst 2015-5-4
What do you mean the area of euler number 0? That doesn't make any sense. A blob (which are numbered starting at 1) can have an area and an Euler number. The Euler number is what it is - you don't code up anything to make the blob have an Euler number of 0. And an Euler number is just a number so it does not have an area - why do you think it has an area? It would be like saying you want the weight of your temperature, or the temperature of your name - it just doesn't make any sense.

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Walter Roberson
Walter Roberson 2015-5-4
enumbers = [blobMeasurements.EulerNumber];
want_blob = enumbers == 0;
wanted_blobs = blobMeasurements[want_blob];
wanted_areas = [wanted_blobs.Area];
is one of the ways.

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