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Get an image export with plot hold on

조회 수: 16(최근 30일)
Alejandro Fernández
Alejandro Fernández 2020년 5월 20일
댓글: Alejandro Fernández 2020년 5월 22일
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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Ameer Hamza
Ameer Hamza 2020년 5월 20일
편집: Ameer Hamza 2020년 5월 20일
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
  댓글 수: 7
Alejandro Fernández
Alejandro Fernández 2020년 5월 22일
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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