Embed cropped image within original image using 'drawpoint'

I want to display a scaled up user-defined region of interest (ROI) within the original image. The issue:

The code:

clc, clear, close all 

% select zoomed in ROI 
firstFrame = imread('tiger_test.jpg');
imshow(firstFrame);
title('Select zoom region:','FontSize',16);
zoom = drawrectangle('Color',[1 1 0]);
zoomRegion = zoom.Position;  
close all

% decide where to put it
imshow(firstFrame);
title('Click where (LH corner) to put it:','FontSize',16);
poop = drawpoint; 
x_inset = round(poop.Position(1));
y_inset = round(poop.Position(2));
close all

% test it: overlay the two images 
cropped = imcrop(firstFrame,zoomRegion); 
newFrame = imresize(cropped,2); % scale up by 1.5x
newFrame_dim = size(newFrame); 
x_w = newFrame_dim(1);
y_w = newFrame_dim(2); 
firstFrame(x_inset:(x_inset+x_w-1),y_inset:(y_inset+y_w-1),:) = newFrame;

figure
imshow(firstFrame); 
drawnow;

Answer 1

[Tarunbir Gambhir]

From the code that you have shared, I see the issue with the use of variables "x_inset" and "y_inset". When using these indices to slice the image matrix "firstFrame" at the end, the first index should be for the y-coordinate as for a matrix it refers to the rows. Similarly, the second index should be for the x-coordinate refering the columns.

A simple fix to your code can be the following:

x_inset = round(poop.Position(2));
y_inset = round(poop.Position(1));

Update these lines of your code. If possible you can change the variable name accordingly so it is easier to reference it in the future.

[Luke G.]

Tarunbir, thanks for taking the time to answer. Such a simple mistake! Cheers