diff --git a/src/main.py b/src/main.py
index f3a281b..d424219 100644
--- a/src/main.py
+++ b/src/main.py
@@ -8,6 +8,8 @@ import argparse as ap
 import json
 import numpy as np
 import matplotlib.pyplot as plt
+from PIL import Image
+import cv2 as cv
 
 # Import custom image filter library
 import filters as flt
@@ -20,6 +22,7 @@ class apply_filters:
         self.output_file = self.args.output_file
         self.dpi = self.args.dpi  # should be around 500-1000dpi
         self.filters = self.args.filters
+        self.flip = self.args.flip
 
         # Read input image, save its dimensions
         self.img = plt.imread(self.input_file)
@@ -33,13 +36,18 @@ class apply_filters:
         self.apply_filter()
 
     def parse_arguments(self):
-        parser = ap.ArgumentParser(prog = 'main.py', description = 'loads and stores image')
-        parser.add_argument("-i", "--input_file", help = "Input file", required = True)
-        parser.add_argument("-o", "--output_file", help = "Output file", required = True)
-        parser.add_argument('-d', "--dpi", type = int, required = True)
+        parser = ap.ArgumentParser(prog = 'main.py', description = 'Program for processing a 2D image into 3D fingerprint.')
+
+        # positional arguments
+        parser.add_argument("input_file", type = str, help = "Location with input file")
+        parser.add_argument("output_file", type = str, help = "Output file location")
+        parser.add_argument("dpi", type = int, help = "Scanner dpi")
+        parser.add_argument('-f', "--flip", help="Flip input image",
+                            type = bool, action = ap.BooleanOptionalAction) # boolean switch
+
         # file with default presets
-        #parser.add_argument('-pf', "--preset_file")
-        parser.add_argument('filters', type = str, nargs = '*')
+        parser.add_argument('-pf', "--preset_file", help = "File with presets")
+        parser.add_argument('filters', type = str, nargs = '*', help = "List of filter names")
         self.args = parser.parse_args()
 
     def convert_dpi(self):
@@ -59,12 +67,15 @@ class apply_filters:
         else:
             raise ValueError("Invalid filter name")
 
-    def resize_img(self):
+    def process_image(self):
         # resize img to the new width
-        if(False):
-            print('')
+        # flip image when mirroring is needed
+        if self.flip:
+            print("Flipping image")
+            self.img = cv.flip(self.img, 1)
 
     def apply_filter(self):
+        self.process_image()
         if len(self.filters) == 0:
             # save original image
             filter = flt.filter_none
@@ -78,7 +89,6 @@ class apply_filters:
     def print_debug(self, dimensions):
         print("Height: " + str(dimensions[0]))
         print("Width: " + str(dimensions[1]))
-        #print("Channels: " + str(dimensions[2]))
 
     def save_image(self):
         ''' Save processed image. '''