Extract horizontal and vertical lines from raster image

조회 수: 6(최근 30일)
I am trying to extract horizantal and vertical bars seprately from following raster image.
I am using two combination of functions
First functions combination (parameters value may vary)
SE = strel('line',60,0);
% OR
SE = strel('rectangle',[1 70]);
Second functions combination
mask = imclearborder(Iraster);
props = regionprops(mask, 'Area');
allAreas = sort([props.Area])
mask = ~bwareaopen(~mask, 10000);
mask = imclose(mask, true(5));
mask = ~bwareaopen(~mask, 10000);
mask = bwareafilt(mask, 1);
barsH = medfilt2(mask, [1, 115]);
props = regionprops(barsH, 'Area', 'PixelList');
allAreas = sort([props.Area])
props = regionprops(barsH, 'Area', 'PixelList');
allAreas = sort([props.Area])
The outcomes are not satisfactory, as outputs are not smooth like in original image.
Are there any other functions that can be helpful ?. I raster.mat is enclosed.

채택된 답변

yanqi liu
yanqi liu 2022년 6월 7일
yes,sir,may be use open and close operation,such as
load Iraster.mat
bw = im2bw(Iraster);
bw2 = imclose(bw, strel('line', 1e2, 0));
bw3 = imopen(bw2, strel('line', 50, 90));
bw3 = imclose(bw3, strel('line', 2e3, 90));
bw3 = imdilate(bw3, strel('disk', 9));
bw3 = logical(bw3.*bw2);
bw4 = logical(~bw3.*bw2);
bw4 = imclose(bw4, strel('line', 3e2, 0));
bw4 = bwareaopen(bw4, 1e3);
bw4 = logical(bw4.*bw2);
figure; imshow(bw2);
figure; imshow(bw3);
figure; imshow(bw4);
  댓글 수: 3
Abdul Hannan Qureshi
Abdul Hannan Qureshi 2022년 6월 10일
@Image Analyst thank you for clarifying this.

댓글을 달려면 로그인하십시오.

추가 답변(0개)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by