MATLAB: Copy RGB image pixel value to another white background

imageimage processingImage Processing Toolboxrgb

I have an image with dimension 785*1300. I want to convert this image to 1300*1300. Here I created a 1300*1300 white image and i want to copy previous image into this image. How can I do this with matlab.

Best Answer

For your specific case here, you can simply use padarray() to pad white on the right and left sides. See the help. Let me know if you can't figure it out, otherwise you can Accept this answer.

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MATLAB: Please Can Somebody tell me how to add additional coins in the eight.tif image that is being copied from the database

I swear I already answered this today but it's no longer there or in your duplicate posting in the newsgroup http://www.mathworks.com/matlabcentral/newsreader/view_thread/324565#891884. I remember referring someone to my BlobsDemo Image Segmentation Tutorial and I said that to crop out coins and you could paste them back in. Since this might be a homework problem (since I've heard it more than once) I'll just give you a similar demo:

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
imtool close all;  % Close all imtool figures.
clear;  % Erase all existing variables.
workspace;  % Make sure the workspace panel is showing.
format longg;
format compact;
fontSize = 20;
image1 = imread('moon.tif');
[rows1 columns1 numberOfColorChannels1] = size(image1)
subplot(2, 2, 1);
imshow(image1);
axis on;
title('Large Grayscale Image', 'FontSize', fontSize);
% Enlarge figure to full screen.
set(gcf, 'units','normalized','outerposition',[0 0 1 1]);
image2 = imread('cameraman.tif');
[rows2 columns2 numberOfColorChannels2] = size(image2)
subplot(2, 2, 2);
imshow(image2);
title('Small Grayscale Image', 'FontSize', fontSize);
axis on;
row1 = 30;
col1 = 51;
row2 = row1 + rows2 - 1;
col2 = col1 + columns2 - 1;
image1(row1:row2, col1:col2) = image2;
subplot(2, 2, 3);
imshow(image1);
axis on;
caption = sprintf('Small Image Pasted\ninto Large Image', 'FontSize', fontSize);
title(caption, 'FontSize', fontSize);

MATLAB: Erasing the boarders in an Image

Do you want to

crop it away, which will give a different size image?
Or set it to white, which would leave the image the same size?

Also, what does "Enhacing" mean? No such word. Does it mean "enhancing" or "erasing"? If erasing, you need to answer my questions as to how you want to erase (get rid of) the black border. If enhancing, you need to define exactly what that means.

To crop you could use imcrop() but it's probably easiest to just use indexing:

img = img(row1 : row2, col1 : col2, :); % Works for either rgb or grayscale image.

I assume you can find the rows and columns and that it's known and fixed for all images. If it moves around and changes size (which is doubtful but possible), you'd need code to find them.

Best Answer

Related Solutions

MATLAB: Please Can Somebody tell me how to add additional coins in the eight.tif image that is being copied from the database

MATLAB: Erasing the boarders in an Image

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