I am trying to calculate the perimeterof leaf but i'm getting the output as 2.7895e+3 in this way .please check this and correct my code. Thankyou in advance

Question

Sarang Nyalkalkar 2020-6-14

关闭： MATLAB Answer Bot 2021-8-20

leaf=imread('13001931309789.jpg');
bw=1-im2bw(leaf);
imshow(bw);
p=regionprops(bw,'Perimeter');
all=[p.Perimeter];

Answer 1

KALYAN ACHARJYA 2020-6-14

As the sample leaf image is not attched with the question , hence I have checked with another image and it shown correctly

leaf=imread('leaf.jpg');
bw=1-im2bw(leaf);
imshow(bw);
p=regionprops(bw,'Perimeter');
all=[p.Perimeter]

try foe this input and please check it for me. If the same problem arises please fix it for me

Answer 2

darova 2020-6-15

编辑：darova 2020-6-15

I'd add imclose to your to clean the image (you have same deffects in it)

I1 = imclose(bw,ones(10));
p=regionprops(I1,'Perimeter');

result

all =
   1.9774e+03

Then i used impoly manually to make a course contour to see if it's close to that value

p = impoly;
p1 = p.getPosition;
x = p1(:,1);
y = p1(:,2);
dl = hypot(diff(x),diff(y));
sum(dl)
axis on

result

ans =
   1.6716e+03