how to repalce a matrix

hi i have a image of 256*256 matrix,and other image2 of 8*8 matrix,now i want to remove 8*8 matrix from 256*256matrix replace image2 8*8 into 256*256 matrix,and wen i call that image the repalced image must be indicated by rounding box

[Jan]

What does this mean: "replace image2 8*8 into 256*256 matrix"? And how can you "call that image"? What does "indicating" mean? And finally, what is the actual question?

[Pat]

I have a image 1 256*256 ,secong image 8*8matrix,now i want to remove,8*8matrix from 256*256 and replace by image 2 of 8*8 matrix

[Jan]

"rounding box" == "bounding box"?

Answer 1

[Amith Kamath]

I wonder what the purpose of this is, but here goes:

Image1 = imread('rice.png'); % conveniently is 256x256.
Image2 = uint8(zeros(8,8)); %Artificial image 2.

Image3 = Image1; Image3(1:8,1:8) = Image2; %change the indices 1:8 to wherever you want to put the Image2 in Image1;

You could add the bounding box, if that's what you mean, by manually adding rows and columns of black pixels around your Image2. Image2(1,:) = ones(size(Image2(1,:))); and so on for all the borders. Does this work?