What should be the ideal thresholding technique for enhancing parts of the image?
![enter image description here][1]


  [1]: http://i.stack.imgur.com/O7izk.jpg

What thresholding techique should i apply for the image in order to highlight the bright regions inside the image as well as the outer boundary..

The **im2bw** function does not give a good result 

Help!!
What should be the ideal thresholding technique for enhancing parts of the image?
===

![enter image description here][1]


  [1]: http://i.stack.imgur.com/O7izk.jpg

What thresholding techique should i apply for the image in order to highlight the bright regions inside the image as well as the outer boundary..

The **im2bw** function does not give a good result 

Help!!