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Copy pathDenoise_FFT.py
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181 lines (138 loc) · 6.38 KB
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import numpy as np
import pygame,time, random, string
from graph.color import *
from math import cos,sin,pi
import math
pygame.init()
screen_width,screen_height = 1200,700
screen = pygame.display.set_mode((screen_width,screen_height))
screen.fill(Black)
font = pygame.font.Font('freesansbold.ttf',15)
N = 100
n = 500
def mark(screen,node_center,colors,radius=8,show=True,Time = 0.05,text = None,text_color = (226, 88, 34)):
if len(colors) == 2:
pygame.draw.circle(screen, colors[0], node_center , radius = 8)
pygame.draw.circle(screen, colors[1], node_center , radius=5)
else:
pygame.draw.circle(screen, colors, node_center , radius)
if text is not None:
font = pygame.font.Font('freesansbold.ttf',15)
text = font.render(text,True,text_color)
screen.blit(text,text.get_rect(center = node_center))
if show:
pygame.display.update()
time.sleep(Time)
def show_signal(signal,color_dot,altura,N = N,displacement = 10,show_points = False):
last = signal(0)+altura
mark(screen,(displacement*(N)+20,signal(N-1)+altura),color_dot,radius = 4,show=False)
for t in range(N):
cur = signal(t) + altura
pygame.draw.line(screen,color_dot,(displacement*t+20,last),(displacement*(t+1)+20,cur),3)
if show_points:
mark(screen,(20*(t )+20,last),White,radius = 4,show = False)
mark(screen,(20*(t+1)+20,cur ),White,radius = 4,show = False)
last = cur
def noise(x):
global random_noise
L = random_noise.size
return random_noise[x%L]
if __name__ == "__main__":
random_noise = (np.random.rand(N)-0.5)*(80)
f1 = lambda x: 35*cos(2*pi*5*x/N)
f2 = lambda x: 20*cos(2*pi*10*x/N)
f3 = lambda x: 50*sin(2*pi*2*x/N)
f = lambda x: f1(x) + f2(x) + f3(x) + noise(x)
power_distribution = abs(np.fft.fft(np.array(list(f(x) for x in range(N)))))
PD = lambda x : power_distribution[x%(N//2+1)]
# show_signal(lambda x: - PD(x)/7,indian_red,14*screen_height//15,N//2+1,displacement=10)
# pygame.display.update()
font = pygame.font.Font('freesansbold.ttf',20)
t = 0
vez = 0
pause = False
while True:
# pygame stuff:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit() #exit pygame,
quit() #exit() program
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_SPACE: #press breakspace to pause or play
pause = not pause
time.sleep(0.2)
if pause:
continue
if vez == 0:
text = font.render("Denoise",True,Cyan)
screen.blit(text,text.get_rect(center = (1110,153)))
text = font.render("the",True,Cyan)
screen.blit(text,text.get_rect(center = (1110,183)))
text = font.render("signal",True,Cyan)
screen.blit(text,text.get_rect(center = (1110,213)))
show_signal(lambda x: f(x+t),Cyan,screen_height//6)
if vez == 1:
text = font.render("Fourier Transform",True,indian_red)
screen.blit(text,text.get_rect(center = (1110,223)))
text = font.render("FFT",True,indian_red)
screen.blit(text,text.get_rect(center = (1110,253)))
text = font.render("and",True,indian_red)
screen.blit(text,text.get_rect(center = (1110,293)))
text = font.render("Pick the peaks",True,indian_red)
screen.blit(text,text.get_rect(center = (1110,323)))
text = font.render("f1",True,Green)
screen.blit(text,text.get_rect(center = (50,15*screen_height//16)))
text = font.render("f2",True,Yellow)
screen.blit(text,text.get_rect(center = (80,15*screen_height//16)))
text = font.render("f3",True,Red)
screen.blit(text,text.get_rect(center = (130,15*screen_height//16)))
show_signal(lambda x: f(x+t),Cyan,screen_height//6)
show_signal(lambda x: - PD(x)/7,indian_red,14*screen_height//15,N//2+1,displacement=10)
if vez == 2:
t += 1
text = font.render("First",True,Green)
screen.blit(text,text.get_rect(center = (1110,223)))
f = lambda x: f2(x)+ f1(x) + noise(x)
show_signal(lambda x: f(x+t),Cyan,screen_height//6)
show_signal(lambda x: f3(x+t),Green,300)
if vez == 3:
t += 1
f = lambda x: f2(x) + noise(x)
show_signal(lambda x: f(x+t),Cyan,screen_height//6)
show_signal(lambda x: f3(x+t),Green ,400)
show_signal(lambda x: f1(x+t),Yellow ,300)
if vez == 4:
text = font.render("Noise",True,Cyan)
screen.blit(text,text.get_rect(center = (1110,113)))
text = font.render("First frequency",True,Green)
screen.blit(text,text.get_rect(center = (1110,503)))
text = font.render("Second frequency",True,Yellow)
screen.blit(text,text.get_rect(center = (1110,403)))
text = font.render("Third frequency",True,Red)
screen.blit(text,text.get_rect(center = (1110,300)))
f = lambda x: noise(x)
show_signal(lambda x: f(x+t),Cyan,screen_height//6)
show_signal(lambda x: f1(x+t),Yellow ,400)
show_signal(lambda x: f2(x+t),Red,300)
show_signal(lambda x: f3(x+t),Green ,500)
if vez == 5:
text = font.render("Clean signal",True,White)
screen.blit(text,text.get_rect(center = (1110,303)))
text = font.render("noise removed",True,White)
screen.blit(text,text.get_rect(center = (1110,333)))
time.sleep(0.03)
screen.blit(text,text.get_rect(center = (1110,333)))
f = lambda x: f1(x+t) + f2(x+t) + f3(x+t)
show_signal(lambda x: f(x+t),White,300)
pygame.display.update()
time.sleep(0.01)
pygame.draw.rect(screen,Black,(0,0,screen_width,screen_height))
t+=1
if t == n:
vez += 1
t = 0
if vez == 2:
vez = 4
if vez==6:
vez = 0
f = lambda x: f1(x) + f2(x) + f3(x) + noise(x)