imwrite "the filename must be provided issue"

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Jishnu Murali Thampan 2020-1-25

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回答： Image Analyst 2020-1-25

Hi ,

I am trying to read a video file and store the frames in a folder . The imwrite is giving me a "a filename must be provided error".This is my program:

filename = [sprintf("%03d L",ii) '.jpg'];

fullname = fullfile(workingDir,'images',filename);

imwrite(leftone,fullname) ;

Please help

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Mohammad Sami 2020-1-25

your filename assignment is creating two strings.

you can replace it with the following

filename = sprintf('%03d L.jpg',ii);

Image Analyst 2020-1-25

Can you make this an answer? That way you can earn reputation points for it, unlike up here in the section which is used to ask posters for additional information.

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Answer 1

Image Analyst 2020-1-25

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The problem is you used double quotes in the first part and single quotes in the second part which make two strings. Try this corrected code:

% Initialize some variables.
leftone = imread('cameraman.tif');
ii = 1
workingDir = pwd; % The current folder.
% Now Jishnu's code, corrected and made more robust.
outputFolder = fullfile(workingDir, '/images');
if ~isfolder(outputFolder)
	mkdir(outputFolder);
end
baseFileName = sprintf('%03d L.jpg',ii)
fullFileName = fullfile(outputFolder,baseFileName)
imwrite(leftone, fullFileName);