How to save multiple images by using saveas command?

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Baisseyev Miram
Baisseyev Miram 2018-6-7
评论： Image Analyst 2019-10-18
Hi, i am using stl file reader (https://www.mathworks.com/matlabcentral/fileexchange/22409-stl-file-reader?s_tid=srchtitle) to read stl model and made some changes to obtain multiple images with differen views, so i want save them all. i tried saveas command by wasnt able to save, so can somebody help me? There is a code
fv = stlread('cameraleft.stl');
%%Render
% The model is rendered with a PATCH graphics object. We also add some dynamic
% lighting, and adjust the material properties to change the specular
% highlighting.
for i=0:5:90
k=1:20;
patch(fv,'FaceColor', [0.8 0.8 1.0], ...
'EdgeColor', 'none', ...
'FaceLighting', 'gouraud', ...
'AmbientStrength', 0.15);
% Add a camera light, and tone down the specular highlighting
camlight('headlight');
material('dull');
% Fix the axes scaling, and set a nice view angle
axis('image');
figure
v1=view([i -180]);
axis off
temp=['',num2str(k),'.jpg'];
saveas(gca,temp);
end
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Baisseyev Miram
Baisseyev Miram 2018-6-7
wasnt able to save multiple images, it only saved last one and give name 1 2 3 4...20.jpg
Image Analyst
Image Analyst 2018-6-7
That's because you used k instead of i. You should have done
fileName = sprintf('%d.jpg', i); % Create filename.
saveas(gca, fileName);
See KSSV's code below.

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回答（2 个）

Image Analyst
Image Analyst 2018-6-7
You used k instead of i. You should have done
fileName = sprintf('%d.PNG', i); % Create filename from i.
saveas(gca, fileName);
I don't even know what the point of k is. Why did you even create it?
Don't use JPG format - use PNG for higher quality. With the code you'll get 0.PNG, 5.PNG, 10.PNG, ..... 90.PNG.
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Image Analyst
Image Analyst 2018-6-7
编辑：Image Analyst 2018-6-7
If you want to save images, try using getframe() and then saving that with imwrite(). Set an image counter to zero before the loop:
imageCounter = 0;
Then, in the loop, get the image and save it with the right name:
rgbImage = getframe(gca);
imageCounter = imageCounter + 1;
fileName = sprintf('%d.PNG', imageCounter); % Create filename from imageCounter.
imwrite(rgbImage, fileName);
Baisseyev Miram
Baisseyev Miram 2018-6-7
Again same problem, firstly rgbImage was struct data type so i made last row like this imwrite(rgbImage.cdata, fileName); and again in saved image was only background i mean without object, when i tried manually(from figure save command) save evething was ok.

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KSSV
KSSV 2018-6-7
Check the below demo code:
N = 10 ;
for i = 1:N
plot(rand(N,1)) ;
saveas(gcf,[num2str(i),'.jpg'])
end
  2 个评论
Image Analyst
Image Analyst 2019-10-18
You'd do
folder = 'c:\whatever'; % Change this to whatever you want.
for k = 1 : N
baseFileName = sprintf('%d.png', k);
fullFileName = fullfile(folder, baseFileName);
saveas(gca, fullFileName); % Save current axes (not the whole figure).
end

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