Johnny Ferreira johnnyferreiradev
johnnyferreiradev
/ Fila.js
Last active
April 1, 2019 19:37
Algoritmo de Fila implementado em uma classe ES6 ou superior
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| function Fila(list) { | |
| this.list = list | |
| this.add = elem => { | |
| this.list.push(elem) | |
| return this.list | |
| } | |
| this.remove = () => { | |
| this.list.shift() |
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| clear all; | |
| close all; | |
| clc; | |
| fs=1000; Ts=1/fs; | |
| f1=20; | |
| DigFreq1=2*pi*f1/fs; | |
| f2=30; | |
| DigFreq2=2*pi*f2/fs; |
johnnyferreiradev
/ TranformadaFourierMaisFiltro.m
Last active
April 9, 2019 00:05
Transformada de Fourier com Filtro Passa Baixa
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| %Deve-se digitar na janela de comandos para funcionar: pkg load signal | |
| clear all; | |
| close all; | |
| clc; | |
| fs=1000; Ts=1/fs; | |
| f1=20; | |
| DigFreq1=2*pi*f1/fs; | |
| f2=30; |
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| clear all; | |
| close all; | |
| clc; | |
| [Y,fs]=audioread('sine1.wav'); | |
| figure(1), port(Y); | |
| Yd = fft(Y); | |
| X_mag = abs(Yd); | |
| N = length(Y); |
johnnyferreiradev
/ tf.m
Created
April 22, 2019 23:50
Aplicação da Transformada de Fourier em uma imagem
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| close all, | |
| close all, | |
| clc | |
| %Leitura da Imagem | |
| imgg = imread ('lena_color.png'); | |
| %Transformar a imagem de RGB para a escala de cinza | |
| img = rgb2gray(imgg); | |
| %Transforma a imagem em double |
johnnyferreiradev
/ tf_filtro_pb.m
Last active
April 23, 2019 00:41
Aplicação da Transformada de Fourier com filtro passa-baixas
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| close all, | |
| close all, | |
| clc | |
| %Leitura da Imagem | |
| imgg = imread ('lena_color.png'); | |
| %Transformar a imagem de RGB para a escala de cinza | |
| img = rgb2gray(imgg); | |
| %Transforma a imagem em double |
johnnyferreiradev
/ dijsktra.js
Created
April 24, 2019 17:25
Algorítmo de Dijsktra implementado em Node.JS e exemplo de utilização
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| const Fila = require('./Fila') // Importação de um algoritmo Fila | |
| // Representação do grafo em Lista de Adjacência | |
| // Exemplo de representação do grafo para o bom funcionamento do algoritmo | |
| /* | |
| * Os pares de valores contidos em ListaAdjacencia[i][j] | |
| * representam o vertice de adjacência e o custo da aresta, | |
| * simultaneamente | |
| */ |
johnnyferreiradev
/ tf_frf.m
Created
April 25, 2019 00:05
Transformada de Fourier com filtro rejeita faixa
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| close all, | |
| clear all, | |
| clc | |
| %Leitura da Imagem | |
| imgg = imread ('lenna.png'); | |
| %Transformar a imagem de RGB para a escala de cinza | |
| img = rgb2gray(imgg); | |
| %Transforma a imagem em double |
johnnyferreiradev
/ tf_fpa.m
Created
April 25, 2019 00:07
Transformada de Fourier com filtro passa-altas
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| close all, | |
| clear all, | |
| clc | |
| %Leitura da Imagem | |
| imgg = imread ('lenna.png'); | |
| %Transformar a imagem de RGB para a escala de cinza | |
| img = rgb2gray(imgg); | |
| %Transforma a imagem em double |
johnnyferreiradev
/ tf_fpf.m
Created
April 25, 2019 00:15
Transformada de Fourier com filtro passa-faixa
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| close all, | |
| clear all, | |
| clc | |
| %Leitura da Imagem | |
| imgg = imread ('lenna.png'); | |
| %Transformar a imagem de RGB para a escala de cinza | |
| img = rgb2gray(imgg); | |
| %Transforma a imagem em double |