how to improve lung boundary distinction in chest xrays?

is there any particular method for improving the boundary for segmentation.i have tried histogram equalisation,contrast enhancement etc

[Mahesh Taparia]

Can you upload one of your image which you want to segment?

[KALYAN ACHARJYA]

Please upload the sample image.

[ammu v]

Answer 1

[Shubh Sahu]

Edge-aware local contrast manipulation might help you. Try the code below.

A = imread('your_image.png');
edgeThreshold = 0.4;
amount = 0.5;
B = localcontrast(A, edgeThreshold, amount);
imshowpair(A, B, 'montage') ;

You can modify edgeThresholdand amount according to your needs.