How can I perform preprocessing in this image

would like to perform a pre-processing in the following image I'm quite difficult to do this, someone can help me.The image quite gray and would isolate the digital fingerprint background noise, sorry my mistake, I only want to save the fingerprint, remove everything else into the picture.

[Image Analyst]

What image? Did you forget to click the "Insert image" button after you clicked the green and brown frame icon and specified your image? Even if you had attached the image, I have no idea what kind of preprocessing you want to do. Do you want to crop it? Do you want to denoise it? Convert it to monochrome? What????

[Image Analyst]

Biza's "Answer" moved here:

Sorry my mistake, I only want to save the fingerprint, remove everything else into the picture.

[Image Analyst]

Looks like you're already done then. All I see is a fingerprint. What constitutes "everything else"?

[Biza Ferreira]

ok. What I need is to study the characteristics of digital printing, which makes them unique for each person. So I would treat the fingerprint in order to highlight their characteristics such as minutiae. I would like to make the homogeneous background making clear the fingerprint, certain sections of the print can be eliminated or confused with the background.

Answer 1

[Image Analyst]

Looks like you need to do some research first for algorithms before you start coding. You can start here http://www.csse.uwa.edu.au/~pk/Research/MatlabFns/#fingerprints

and then look here: http://www.visionbib.com/bibliography/contentspeople.html#Face%20Recognition,%20Detection,%20Tracking,%20Gesture%20Recognition,%20Fingerprints,%20Biometrics

Answer 2

[Luke Anderson]

This is the result of filtering your fingerprint image with a 75% black and 25% white filter. Is this sort of what you were looking for?