# How to use imfill() function to fill the interior of the boundary surface using Matlab?

조회 수: 35(최근 30일)
M.S. Khan 2021년 3월 11일
댓글: M.S. Khan 2021년 3월 20일
Hi dear community members,
i am using flood fill operation to fill the interior. i have closed the boundary surface. There are no holes on the boundary surface but still, the interior cannot be filled.
I am using the following code. Please guide me where i am making mistake. The matrix A as a text file is already attached.
Regards.
interior_filled = imfill(A,'holes')
##### 댓글 수: 1표시숨기기 없음
M.S. Khan 2021년 3월 12일
Is the imfill() function is not capable to fill the interior region? How come, boundary surface is closed and imfill() function is not applicable?

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### 채택된 답변

Image Analyst 2021년 3월 12일
@M.S. Khan, try this:
% Demo by Image Analyst, March, 2021.
clc; % Clear the command window.
close all; % Close all figures (except those of imtool.)
clearvars;
workspace; % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 16;
fprintf('Beginning to run %s.m ...\n', mfilename);
grayImage = importdata('Boundary_closed_1s_3s.txt');
subplot(2, 1, 1);
imshow(grayImage, []);
impixelinfo;
axis('on', 'image');
% Create a binary image.
binaryImage = grayImage ~= 0;
% Fill the object by scanning across all columns and
% drawing a line from the top-most pixel to the bottom-most pixel.
[rows, columns] = size(binaryImage);
for col = 1 : columns
% Find the top most pixel.
topRow = find(binaryImage(:, col), 1, 'first');
if ~isempty(topRow)
% If there is a pixel in this column, then find the lowest/bottom one.
bottomRow = find(binaryImage(:, col), 1, 'last');
% Fill from top to bottom.
binaryImage(topRow : bottomRow, col) = true;
end
end
interior_filled = binaryImage;
% interior_filled = imfill(binaryImage, 4, 'holes');
subplot(2, 1, 2);
imshow(binaryImage, []);
axis('on', 'image');
fprintf('Done running %s.m\n', mfilename);
##### 댓글 수: 12표시숨기기 이전 댓글 수: 11
M.S. Khan 2021년 3월 20일
i think, the 'P' should be changed with respect to the shape of the object. i am trying how to handle it.

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