How can I increase the resolution?

Hi

I used the function cpselect to choose the FixedPoints and MovingPoints, and then I used imwarp to transform the image.

Here is the code I used:

a=imread('123.jpg');
h=cpselect('123.jpg','123.jpg');
%% 
mytform=fitgeotrans(fixedPoints,movingPoints,'projective');
r=dir('*.jpg');
for i=1:numel(r)
R=r(i);
Q=fullfile(R.folder, R.name);
T=imread(Q);
t=imwarp(T,mytform);
figure,imshow(t);
end

After transforming, the resolution decreased and many details lost.

I wonder how can I improve it, thank you very much!

The original image:

The controling points I choose:

The final image:

[Image Analyst]

What is the actual resolution? Can you do this after you display them

axis('image', 'on');