how to save the output image

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Frisda Sianipar 2021-2-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/753729-how-to-save-the-output-image

评论： Frisda Sianipar 2021-2-25

citra=imread('ISIC_0024336.jpg');
figure, fig1=imshow(citra);
load mri
V = squeeze(citra);
citra3=montage(reshape(V,size(citra)),map,'Indices',3);
saveas(citra3,'ISIC_0024336coba.jpg');

Would you help me please, How to save the output image in Matlab automatically?

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Walter Roberson 2021-2-23

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citra3=montage(reshape(V,size(citra)),map,'Indices',3);

since V is squeezed citra, reshape of it back to size of citra would just give you back citra... so why bother with the shape change and why not just pass citra into montage?

Frisda Sianipar 2021-2-23

actually I use this code to remove the background from the image only. And after that I want to save the output automatically, but I don't know what to use.

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Answer 1

Walter Roberson 2021-2-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/753729-how-to-save-the-output-image#answer_631184

在 MATLAB Online 中打开

infile = 'ISIC_0024336.jpg';
citra=imread(infile);
figure, fig1=imshow(citra);
load mri
V = squeeze(citra);
citra3=montage(reshape(V,size(citra)),map,'Indices',3);
[folder, basename, ext] = fileparts(infile);
outfile = fullfile(folder, [basename 'coba' ext]);
saveas(citra3, outfile);

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Walter Roberson 2021-2-24

在 MATLAB Online 中打开

infile = 'ISIC_0024336.jpg';

[folder, basename, ext] = fileparts(infile)

folder = 0×0 empty char array

basename = 'ISIC_0024336'

ext = '.jpg'

That is, folder, basename, and ext are output of analyzing the filename. folder will store the folder info extracted from the filename. basename will store the filename without the last extension. ext will store the '.' and content of the extension.

Then once those are known, I put them back together again with 'coba' just before the extension, reflecting that your saveas(citra3,'ISIC_0024336coba.jpg'); has the same name as the file you read from except with 'coba' added.

If you want to write your output to a different folder, then that is no problem:

outfolder = 'F:\kuliah\semester6\TA2\Implemen';
if ~isdir(outfolder); mkdir(outfolder); end
load mri  %I presume it has the variable map in it
infile = 'ISIC_0024336.jpg';
citra=imread(infile);
imshow(citra);
V = squeeze(citra);
citra3=montage(reshape(V,size(citra)),map,'Indices',3);
[~, basename, ext] = fileparts(infile);
outfile = fullfile(outfolder, [basename 'coba' ext]);
saveas(citra3, outfile);

Walter Roberson 2021-2-24

在 MATLAB Online 中打开

image_folder = 'F:\kuliah\semester5\TA\Implementasi';
outfolder = 'F:\kuliah\semester6\TA2\Implemen';
if ~isdir(outfolder); mkdir(outfolder); end
load mri  %I presume it has the variable map in it
fileinfo = dir(fullfile(image_folder, '*.jpg'));
filenames = fullfile({fileinfo.folder}, {fileinfo.name});
total_images = numel(filenames);
for n = 1 : total_images
    thisfile = filenames{n};
    [~, basename, ext] = fileparts(infile);
    citra = imread(thisfile);
    V = squeeze(citra);
    
    fprintf('processing %s\n', basename);
    
    citra3 = montage(reshape(V,size(citra)), map, 'Indices', 3);
    outfile = fullfile(outfolder, [basename 'coba' ext]);
    saveas(citra3, outfile);
end

With a reminder that if you are not doing any processing on V, then you could make this shorter as

image_folder = 'F:\kuliah\semester5\TA\Implementasi';
outfolder = 'F:\kuliah\semester6\TA2\Implemen';
if ~isdir(outfolder); mkdir(outfolder); end
load mri  %I presume it has the variable map in it
fileinfo = dir(fullfile(image_folder, '*.jpg'));
filenames = fullfile({fileinfo.folder}, {fileinfo.name});
total_images = numel(filenames);
for n = 1 : total_images
    thisfile = filenames{n};
    [~, basename, ext] = fileparts(infile);
    citra = imread(thisfile);
    
    fprintf('processing %s\n', basename);
    
    citra3 = montage(citra, map, 'Indices', 3);
    outfile = fullfile(outfolder, [basename 'coba' ext]);
    saveas(citra3, outfile);
end

Walter Roberson 2021-2-24

在 MATLAB Online 中打开

implemencoba.fig is not one of the output files. You need to look inside the Implemen directory of where you are now.

dir('F:\kuliah\semester6\TA2\Implemen')

Frisda Sianipar 2021-2-25

yes, it same. nothing is saved

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how to save the output image

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