Find out which blob has the pixel location [x,y]?

1 次查看（过去 30 天）
Gopichandh Danala
Gopichandh Danala 2017-2-13
评论： Gopichandh Danala 2017-2-14
I have a labelled blob image using bwlabel, I want to find a blob which has the pixel location [x,y] and display it by removing the rest of blobs. Here is the code I wrote, but it doesn't give correct answer, please fix this
[y, x] = ginput(1);
x = round(x);
y = round(y); % here x and y is a location of blob i want to keep
BW = bwlabel(newImgg,4) ; % labelled image contains several blobs
% figure, imshow(BW, [])
props = regionprops(logical(BW),'all');
while(1)
for k = 2:length(props)
if isequal(ismember([x,y],props(k,1).PixelList),[1, 1]);
keeperIndex = k;
break
end
end
break
end
keeperBlobsImage = ismember(BW, keeperIndex);
keeperBlobsImage = imfill(keeperBlobsImage,'holes');
figure, imshow(keeperBlobsImage,[])
Thanks,
Gopi

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2017-2-13
编辑：Walter Roberson 2017-2-13
BW(y, x) is the blob number when BW is the result of bwlabel(). And you can then proceed to get rid of everything else using the mask BW == BW(y, x)
Note that y is first and then x in indexing.
  5 个评论
显示 3更早的评论
Gopichandh Danala
Gopichandh Danala 2017-2-14
The problem I found in my code is that
if isequal(ismember([x,y],props(k,1).PixelList),[1, 1]);
This statement in the above code is looking for all x coordinates in props(k,1).PixelList) separately and all y coordinates in props(k,1).PixelList) separately and if both those x and y occur anywhere in x and y column it chooses that blob as the keerBlolb
Gopichandh Danala
Gopichandh Danala 2017-2-14
I understood what you tried to say, It worked Thanks

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Images 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by