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Get an image export with plot hold on

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Hi, I was wondering if anyone would know how to export an image that has had a hold on it and a Plot. I'll explain.
I have an image where I detect the contour and what I want to save is the original image where the points that are blue contours overlapping the original image are shown.
clear all; clc; close all
I = rgb2gray(imread('tumor_091R.tif'));
BW = edge(I,'Canny',100/255);
[r,c] = find(BW == 1);
figure
imshow(I)
hold on
plot(c,r,'.')
exportgraphics(gcf,'11.tif')
When I'm in Matlab and I zoom in on a certain area what I get is this:
But when I export it using the exportgraphics command what I get when I zoom in on the area I want to see is a spot of the type I show:
What I want to achieve is that the image I export allows me to zoom in as Matlab does, I tried the getframe option but the result was the same. Thanks in advance

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Accepted Answer

Ameer Hamza
Ameer Hamza on 20 May 2020
Edited: Ameer Hamza on 20 May 2020
If you want to zoom on the image, than you may try to save it in a vector format, e.g., eps file format. Try this
clear all; clc; close all
I = rgb2gray(imread('tumor_091R.tif'));
BW = edge(I,'Canny',100/255);
[r,c] = find(BW == 1);
fig = figure;
imshow(I)
hold on
plot(c,r,'.')
fig.Renderer = 'painters'; % render the points as vector
exportgraphics(gcf,'11.eps')
Alternatively, you can also use this excellent FEX package to save in high-res raster format: https://www.mathworks.com/matlabcentral/fileexchange/23629-export_fig
clear all; clc; close all
I = rgb2gray(imread('tumor_091R.tif'));
BW = edge(I,'Canny',100/255);
[r,c] = find(BW == 1);
fig = figure;
imshow(I)
hold on
plot(c,r,'.')
export_fig(gcf,'11.tif', '-r500'); % 500 is PPI of the image

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Show 4 older comments
Alejandro Fernández
Alejandro Fernández on 21 May 2020
It still doesn't work but that's okay, I still thank you very much for all your help.
Ameer Hamza
Ameer Hamza on 21 May 2020
If possible, you may try to install R2018b and try to export eps in that version. I have already noticed that saving a complex graphic in vector format have greatly degraded after that version. That is why I keep an installation of R2018b just for this purpose. If this is extremely important, you may give it a try, although I am not sure that it will still work. It is just a guess.
Alejandro Fernández
Alejandro Fernández on 22 May 2020
I'm sorry it took me a while to answer you, I tried to do it with the 2018b version but nothing, I'm afraid the result is still the same.
Thank you very much for everything anyway.

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