Gabor Filtering based imaged enhancement
	- block size is fixed to 17x17 (same orientation is assumed inside the block)
	- gabor filter size is fixed to 7x7 (size of filter to apply over each pixel)
	- 0.155 is kept as ridge frequency	
	
Command to compile:
	1) javac sharpen_image.java
	2) javac estimate.java
	3) javac gabor_filter.java

Command to run:
	java gabor_filter
	file_name of input image is hardcoded in line no. 50 of gabor_filter.java


minutiae_extraction.java extracts minutiae points from filtered image with support functions from imgoperations.java