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utils.py
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utils.py
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# -*- coding: utf-8 -*-
"""
@author: Dani, richard
"""
import numpy as np
import cv2
import matplotlib.pyplot as plt
def evenNum(number):
"""
function that returns the next even number
"""
return number + (number%2)
def oddNum(number):
"""
function that returns the next odd number
"""
return number + np.uint(not(number%2))
def notZero(number):
if(number):
return number
else:
return 1
def rescale(im,final_size,padding):
"""
function used to resize with the desired padding a image keeping the input
aspect ratio
"""
sy,sx = final_size
sy,sx = sy-padding,sx-padding
if(np.shape(im) != (sy,sx)):
modified_im = np.ones(final_size)
current_size = np.shape(im)
if(current_size[1]>current_size[0]):
im = cv2.resize(im,(sx,int(sx*current_size[0]/current_size[1])))
else:
im = cv2.resize(im,(int(sy*current_size[1]/current_size[0]),sy))
xmid = int((sx+padding)/2)
ymid = int((sy+padding)/2)
modified_im[(xmid-int(np.shape(im)[0]/2)):(xmid+int(np.ceil(np.shape(im)[0]/2.0))),
(ymid-int(np.shape(im)[1]/2)):(ymid+int(np.ceil(np.shape(im)[1]/2.0)))] = im
return modified_im
max_plots = 0
def plt_i(im,title=None, maxp=30):
"""
function used to plot a limited quantity of images
"""
global max_plots
max_plots += 1
if(max_plots < maxp):
plt.figure(), plt.imshow(im,cmap=plt.cm.gray)
else:
raise Exception("Too many plots are open! I might just saved your butt here...")
# pass
if not(title == None):
plt.title(title)