I am try to blur half portion of the image but in output i am getting blurred portion of image with box how can i remove this box as I need entire image without that blurred box????

clear all
close all
I=imread('cameraman.tif');
[rows, columns] = size(I);
midColumn = ceil(columns/2);
leftHalf = I(:, 1:midColumn);
rightHalf = I(:, midColumn+1:end);
windowSize = 11;
blurryLeft = imfilter(leftHalf, ones(windowSize)/windowSize^2);
blurryRight = imfilter(rightHalf, ones(windowSize)/windowSize^2);
imshow(blurryLeft);
I(1:256, 1:128) = blurryLeft;
imshow(I);

Answer 1

[Image Analyst]

Replace this line:

I(1:256, 1:128) = blurryLeft;

with this line

figure;

Now you will have the original image in a new figure and it will not have any blurred pixels in it.

[nick chaudhary]

yes but I need right portion also and that too unblurred

[Image Analyst]

No part of it will be blurred. I is the original image. the entire program can be simplified to this:

I=imread('cameraman.tif');
imshow(I);

Delete everything else and you will not have any blurred stuff anywhere.

[nick chaudhary]

oops I want to say that if you run this progamme you will get full image with left half blurred(inside) window .i need entire image with left half blurred but it should be continuous(no window or box including the blurred portion).

[Image Analyst]

Maybe you're referring to the edge effects. Try this:

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 20;

% Get original image.
grayImage = imread('cameraman.tif');
[rows, columns] = size(grayImage);
% Display the original gray scale image.
subplot(2, 2, 1);
imshow(grayImage, []);
axis on;
title('Original Image', 'FontSize', fontSize, 'Interpreter', 'None');

% Blur the image
windowWidth = 9;
kernel = ones(windowWidth, windowWidth)/windowWidth^2;
blurredImage = conv2(double(grayImage), kernel, 'same');
subplot(2, 2, 2);
imshow(blurredImage, []);
axis on;
title('Blurred Image', 'FontSize', fontSize, 'Interpreter', 'None');

% Combine blurred and original in one image.
midColumn = ceil(columns/2);
leftHalf = double(grayImage); % Initialize
leftHalf(:, 1:midColumn) = blurredImage(:, 1:midColumn);
subplot(2, 2, 3);
imshow(leftHalf, []);
axis on;
title('Blurred Image', 'FontSize', fontSize, 'Interpreter', 'None');

% Set up figure properties:
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);
% Get rid of tool bar and pulldown menus that are along top of figure.
set(gcf, 'Toolbar', 'none', 'Menu', 'none');
% Give a name to the title bar.
set(gcf, 'Name', 'Demo by ImageAnalyst', 'NumberTitle', 'Off')

[Jameel Ahmed]

I need your help. I want to save above image and I write this command: imwrite(leftHalf,'D:\rh.jpg');

Though image is saved but only lines are appearing. Please tell me the correct command so that I can save so that whole image appear.

[Image Analyst]

blurredImage is a floating point image. To save it to a JPG file, which you should NEVER do when you're doing image analysis, you'd need to cast to uint8 or uint16:

blurredImage = uint8(blurredImage);

I really suggest you use PNG (the new defacto standard) rather than the horrible JPG with its horrendous compression artifacts.