Copy RGB image pixel value to another white background

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.

Answer 1

[Image Analyst]

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.

[Malan Jayanka]

Thank you sir It is correct answer for my question. I did correctly with help of your answer

[Malan Jayanka]

Sir i have one question.

When we use the padarray function, how can we insert parameter values as variables?

eg:

B = padarray(I, [0, calculatedWidth], 255);

Like wise

[Image Analyst]

Yes, that should work. Doesn't it? This works fine for me:

colorImage = imread('peppers.png');
subplot(1, 2, 1);
imshow(colorImage);

padding = 100;
paddedImage = padarray(colorImage, [0, padding], 255);
subplot(1, 2, 2);
imshow(paddedImage);

[Malan Jayanka]

Thank you sir, It was worked. If I got any doubt I will ask from you sir Thankz a lot sir again

Answer 2

[Image Analyst]

Just copy and paste. See my attached demo.

[Malan Jayanka]

Thank you.. But here image was pasted on to gray scale image.But I want final image in RGB format

[Image Analyst]

But adapting it to color is straightforward. Can you do it?

Or just try something like this

image2(row1:row2, col1:col2, :) = image1;

Hopefully you can figure out what row1, row2, col1, and col2 are.

[Image Analyst]

Alright, I adapted my demo for you. See attached.

[Malan Jayanka]

Could you please explain this more.. image2(row1:row2, col1:col2, :) = image1;

[Image Analyst]

The parts of image2 going from row1 to row2, and from column 1 to column 2 will be replaced by image1.