Problem merging two images

Hi,

Why I can not merge these two images?

I = imread('peppers.png');

[height, width] = size(I);
blankImage = ones(height/5,width,3);

combineImg = [I; blankImage]
imshow(combineImg);

Thanks

Answer 1

[Ben11]

This will work:

clc
clear
close all

I = imread('peppers.png');

[height, width,Channels] = size(I)
blankImage = ones(round(height/5),width,Channels,'like',I);

combineImg = [I; 255*blankImage];
imshow(combineImg);

First you needed to round the height dimension, and then since the image is RGB it has 3 channels, so the 3rd output of 'size' is 3, hence you had a conflict when trying to concatenate.

Here is what I got as output. Notice that there is a white image at the bottom but it does not show up well here. Try it in Matlab and it will work.

EDIT: Here is what it look like with a black blankImage.To get it, change

combineImg = [I; 255*blankImage];

with

combineImg = [I;blankImage];

Output:

[hu]

I use 2012a version and I got these errors:

Error using ones
Leading inputs must be numeric.

Error in Untitled2 (line 8)
blankImage = ones(round(height/5),width,Channels,'like',I);

Any reason why?

[Ben11]

mhh nope! I'm using 2014a; maybe in 2012 you can't use 'like' to cast the image as the same type as the original. What if you use this:

blankImage = ones(round(height/5),width,Channels,'uint8');

[hu]

Thanks, it working

[Ben11]

ok great then!

Answer 2

[Karbala'a Unvi. Science]

hi every one I have a cropped image from the original image. The cropped one is processed. Now I want to reteren that part to the original image.. the processing on the cropped image is not to much, it will not change so many things in the cropped image. Need for the help as fast as you can