How to threshold in this.?

http://www.fileconvoy.com/dfl.php?id=gc213fed1ab02da0d9992250810234ad7ac15079a4

 clear all;
 clc;
 I = imread('2.png');
 threshold = graythresh(I);
 originalImage = im2bw(I, threshold);
 i = bwareaopen(originalImage,70);
 TI = imfill(i, 'holes');
 imshow(TI)

I want to detect only the strip which is on object.?

This code not works.

Is there any other method or modification..?

[Image Analyst]

I wasn't able to download your image. It saves it but it doesn't save it as a real PNG image even though the extension is PNG.

[Lalit Patil]

i have changed link..

Answer 1

[Image Analyst]

Don't use graythresh(). Pick your own threshold, perhaps using my interactive thresholding function http://www.mathworks.com/matlabcentral/fileexchange/29372-thresholding-an-image that's in my File Exchange.

[Lalit Patil]

yes it, works at min=88 and max=233,

but i want code for this..

[Image Analyst]

binaryImage = grayImage >= 88 & grayImage <=233;

[Lalit Patil]

Very helpful Demo...:) It Solves many problems...