on the image window output shows repeatation of image
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
I am trying to implement low pass filter code but it is showing repeatation of output image on same window....Plz help me to overcome this problem
my code is like this--
clc;clear all;close all; f=imread('e:\IMAGES\quantum1.png');
a=imnoise(f,'gaussian',0,0.01);
w=[1 1 1 1 1 1 1;1 1 1 1 1 1 1;1 1 1 1 1 1 1;1 1 1 1 1 1 1;1 1 1 1 1 1 1;1 1 1 1 1 1 1;1 1 1 1 1 1 1 ]/49 [row col]=size(a); for x=4:1:row-4 for y=4:1:col-4 a1(x,y)=w(1)*a(x-3,y-3)+ w(2)*a(x-3,y-2)+ w(3)*a(x-3,y-1)+ w(4)*a(x-3,y)+ w(5)*a(x-3,y+1)+ w(6)*a(x-3,y+2)+ w(7)*a(x-3,y+3)+ w(8)*a(x-2,y-3)+ w(9)*a(x-2,y-2)+ w(10)*a(x-2,y-1)+ w(11)*a(x-2,y)+ w(12)*a(x-2,y+1)+ w(13)*a(x-2,y+2)+ w(14)*a(x-2,y+3)+ w(15)*a(x-1,y-3)+ w(16)*a(x-1,y-2)+ w(17)*a(x-1,y-1)+ w(18)*a(x-1,y)+ w(19)*a(x-1,y+1)+ w(20)*a(x-1,y+2)+ w(21)*a(x-1,y+3)+w(22)*a(x,y-3)+ w(23)*a(x,y-2)+ w(24)*a(x,y-1)+ w(25)*a(x,y)+ w(26)*a(x,y+1)+ w(27)*a(x,y+2)+ w(28)*a(x,y+3)+w(29)*a(x+1,y-3)+ w(30)*a(x+1,y-2)+ w(31)*a(x+1,y-1)+ w(32)*a(x+1,y)+ w(33)*a(x+1,y+1)+ w(34)*a(x+1,y+2)+ w(35)*a(x+1,y+3)+w(36)*a(x+2,y-3)+ w(37)*a(x+2,y-2)+ w(38)*a(x+2,y-1)+ w(39)*a(x+2,y)+ w(40)*a(x+2,y+1)+ w(41)*a(x+2,y+2)+ w(42)*a(x+2,y+3)+w(43)*a(x+3,y-3)+ w(44)*a(x+3,y-2)+ w(45)*a(x+3,y-1)+ w(46)*a(x+3,y)+ w(47)*a(x+3,y+1)+ w(48)*a(x+3,y+2)+ w(49)*a(x+3,y+3); end end figure(1) imshow(a)
figure(2) imshow(a1)
Also,how to convert grayscale image to binary image?????
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/153672/image.png)
1 Commento
Youssef Khmou
il 13 Dic 2013
before the low pass filter try to convert the input into gray scale :
T=rgb2gray(f);
Risposte (2)
Youssef Khmou
il 13 Dic 2013
Modificato: Youssef Khmou
il 13 Dic 2013
hi,
The code you provided is working correctly, but you did not exploit the matrix operations effectively, here is simpler version of you program :
clc;clear all;close all;
%f=imread('e:\IMAGES\quantum1.png');
f=im2double(imread('circuit.tif'));
a=imnoise(f,'gaussian',0,0.01);
w=ones(7)/49;
[row col]=size(a);
a1=zeros(row,col);
for x=4:1:row-4
for y=4:1:col-4
a1(x,y)=sum(sum(w.*a(x-3:x+3,y-3:y+3)));
end
end
figure(1),imshow(a)
figure(2),imshow(a1)
The binary transformation is given by :
b=im2bw(a1);
figure(3), imshow(b)
2 Commenti
Image Analyst
il 14 Dic 2013
That's because you have a color image and you're not using the size function properly. Please see http://blogs.mathworks.com/steve/2011/03/22/too-much-information-about-the-size-function/
Image Analyst
il 13 Dic 2013
Just simply do
w = ones(7);
a1 = imfilter(double(a), w);
imshow(a1, []);
4 Commenti
Image Analyst
il 14 Dic 2013
You have a color image so you need to convert to hsv with rgb2hsv(), then blur the v image only with imfilter() or conv2(). Then convert back to rgb with hsv2rgb().
Vedere anche
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!