Thread Subject: cell counting

Could someone help with counting the number of cells that
have been segmented in an image. i have segemented the
cells and marked the outline of each cell. Now i need to
count the number of cells present.

Have you looked at the demos in the image processing
toolbox? They should point you in the right direction. If
you have the cells segmented, you should be able to do
something like use imfill to fill the interiors and then
convert to b&w and finally use regionprops to get stats on
the connected pixels.


"Shree " <sherly2443.nospam@mathworks.com> wrote in message
<fq3rgl$7ra$1@fred.mathworks.com>...
> Could someone help with counting the number of cells that
> have been segmented in an image. i have segemented the
> cells and marked the outline of each cell. Now i need to
> count the number of cells present.

"Shree " <sherly2443.nospam@mathworks.com> wrote in
message <fq3rgl$7ra$1@fred.mathworks.com>...
> Could someone help with counting the number of cells
that
> have been segmented in an image. i have segemented the
> cells and marked the outline of each cell. Now i need to
> count the number of cells present.

There is a very nice demo in the IMAGE PROCESSING TOOLBOX
for the same

Small ex:
I = imread('coins.png');
imshow(I);
bw = im2bw(I,graythresh(I));
figure,imshow(bw);
bw = imfill(bw,'holes');
figure,imshow(bw);
L = bwlabel(bw);
obj1 = max(max(L))

% OR can use Alternative Code

stats = regionprops(L,'Basic');
obj2 = numel(stats)

HTH
Vihang

"Vihang Patil" <vihang_patil@yahoo.com> wrote in message
<fq41r6$pe7$1@fred.mathworks.com>...
> "Shree " <sherly2443.nospam@mathworks.com> wrote in
> message <fq3rgl$7ra$1@fred.mathworks.com>...
> > Could someone help with counting the number of cells
> that
> > have been segmented in an image. i have segemented the
> > cells and marked the outline of each cell. Now i need
to
> > count the number of cells present.
>
> There is a very nice demo in the IMAGE PROCESSING
TOOLBOX
> for the same
>
> Small ex:
> I = imread('coins.png');
> imshow(I);
> bw = im2bw(I,graythresh(I));
> figure,imshow(bw);
> bw = imfill(bw,'holes');
> figure,imshow(bw);
> L = bwlabel(bw);
> obj1 = max(max(L))
>
> % OR can use Alternative Code
>
> stats = regionprops(L,'Basic');
> obj2 = numel(stats)
>
> HTH
> Vihang
>
Thank you vihang for your codes. It was very useful to me.
I was able to count the cells with your codes.