over lap image onto another image??

11 views (last 30 days)
miskie
miskie on 1 Mar 2011
Edited: John Kelly on 27 Feb 2015
HI , im supposed to make a function
function [] = paste ( smallimage, bigimage, centerxy)
which returns the small image pasted onto the big image placed at [ x ,y] location center xy. the smallerimage is copied to overlay part of the big image, it will appear inside the bigimage and cover some of its pixels
I did not learn anything about copying and pasting images in class , and ive been searching the internet so much to find out how , but i cannot find any sites that teaches me how to do something like this
Do i do something like i=imread(smallimage) i=imcrop(i)
and then i dont know what else to do , how would i paste it in the other picture matrix?
is there impaste( location , bigimage)? oh jeez ive spent 40 of the past 48 hours trying to figure out matlab
  2 Comments
Walter Roberson
Walter Roberson on 1 Mar 2011
Are smallimage and bigimage the _file names_ of images, or are they the image matrices ? imread() would be used if you are being passed the file names, but not if you are being passed the data.
You are not likely to have a use for imcrop.
If the function definition must be the one shown, then you cannot return anything from that function, which disagrees with your written requirements.
miskie
miskie on 1 Mar 2011
smallimage and bigimage are the file names yes ,
so at the start of my function it would be like
i=imread(bigimage);
h=imread(smallimage);
....
then i dont know what i could do
impaste? imoverlap? like is there a built in function to overlay an image or something?:

Sign in to comment.

Accepted Answer

Brett Shoelson
Brett Shoelson on 1 Mar 2011
Consider:
a = magic(7)
b = rand(2,3)
a(3:4,4:6) = b
% Or, more generally,:
startrow = 3;
startcol = 4;
a(startrow:startrow+size(b,1)-1,startcol:startcol+size(b,2)-1) = b;
Cheers,
Brett

More Answers (1)

Walter Roberson
Walter Roberson on 1 Mar 2011
Edited: John Kelly on 27 Feb 2015
The result of reading in an image is a matrix. After your imread() you would have two matrices. You can copy one matrix to a particular place in another matrix.

Categories

Find more on Manage Products in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!