How to add metadata such as geokeydirectory, geoasciiparams, modelpixelscale and modeltiepoint to a compressed tiff image?

Question

I have resized my original tiff file (1.5gb) to a tiff file (170mb). But there was no geo reference points in the resized image which was present in my original tiff file. I have attached the screenshot which shows the geoinfo(co-ordinate points) of my original tiff file.

I need the geo reference points\co-ordinate points to this resized image from my original tiif file. How do i add it?

I have coded my image resizing in "Matlab". My code is as follows -

t = Tiff('D:\sample\a_01.tif','r'); 
imageData = read(t); 
Itrain = imresize(imageData,0.3); 
channel4 = Itrain(:,:,4); 
Itrain = Itrain(:,:, 1:3); 
scaled_train = mat2gray(Itrain); 
imwrite(scaled_train,'D:\com_1.tif')

Please do help me out!!