Image back round removal

Dear Friends,
I have few green colour citrus fruits images taken over the conveyor belt which is of blue colour. Now i need to extract the friut image with original colour and the back round blue conveyor belt has to be removed. I tried a lot but i couldn't finish it successfully....
My project is find the hue value of each citrus fruits and need to segregate the fruit based on hue value.. for that i need to get the green colour citrus fruits extracted from the image.....
I hereby attached few image samples and please help me out; i am looking for good response from you people...
Attachments:
17.jpg ‏18 KB
sample0.jpg ‏17 KB
Samp8.jpg ‏14 KB

I hereby attaching the vi which i have designed....Please go through and reply me.... This vi works good for the file 1.bmp attached..... Now i am looking to change over to my previous file attacehd in my last post...
The vi attacehd works for .bmp image
Attachments:
extractob.vi ‏88 KB
1.jpg ‏34 KB

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Image back round removal

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