The code cannot read it says path not found and

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ASMA MOHAMMAD 2021-6-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/847375-the-code-cannot-read-it-says-path-not-found-and

评论： Steven Lord 2021-6-5

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imgpath{4}= 'D:\MATLAB\Finger_Knuckle_Print_Original_Database\Left_Index_Finger_165\';
fd4=fopen('loglist_Left_Index.txt','rt'); % 294 subjects Train  Total train = 493 
feat1=[];
k=6;
for i=1:165
    txt1=fscanf(fd4,'%s\n',1);
    for j=1:6
       fn1=sprintf('%s/%s index/0%iROI.jpg',imgpath{4},txt1,j);%u01000s0001_fnf1.jpg
       img1= imread (fn1);

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Steven Lord 2021-6-5

You have asked this question 1, 2, 3, and 4 times and received answers and/or comments on three of those questions.

Asking the same thing multiple times is not necessarily likely to get you different answers. It's likely to get you the same answer multiple times.

Please pick one of these questions and continue the discussion in that one question. Please don't ask this a fifth time.

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Answer 1

Walter Roberson 2021-6-3

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https://ww2.mathworks.cn/matlabcentral/answers/847375-the-code-cannot-read-it-says-path-not-found-and#answer_716295

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Does it say that for the fopen() or for the imread()?

fn1=sprintf('%s/%s index/0%iROI.jpg',imgpath{4},txt1,j);%u01000s0001_fnf1.jpg

That sprintf() does not construct a filename that looks like u01000s0001_fnf1.jpg . It constructs a file name that has an initial 0, followed by a variable number of digits, followed by ROI.jpg . So for example 01ROI.jpg, 012.ROI.jpg 0123.ROI.jpg .

Chances are that you should be using at %04d format (or similar) instead of a 0%i format.

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ASMA MOHAMMAD 2021-6-3

Error using imread (line 349)

File "D:\MATLAB\Finger_Knuckle_Print_Original_Database\Left_Index_Finger_165\/ index/0001

iROI.jpg" does not exist.

Error in feat (line 13)

img1= imread (fn1);

Walter Roberson 2021-6-3

在 MATLAB Online 中打开

Your existing code

fn1=sprintf('%s/%s index/0%iROI.jpg',imgpath{4},txt1,j);%u01000s0001_fnf1.jpg

cannot produce 0001iROI.jpg . It would produce 01ROI.jpg instead.

If you are following my suggestion of something like %04d then you accidentally left in the i and would use something like

fn1=sprintf('%s/%s index/%04dROI.jpg',imgpath{4},txt1,j);%u01000s0001_fnf1.jpg

which would produce 0001ROI.jpg

But we are guessing here about the exact filenames that are in your directory. In your directory, what is the filename corresponding to j = 1, and what is the filename corresponding to j = 10 ?

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