I don't need to add a path if the picture file is in the same directory as my matlab file right?

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I am in a directory with project1.m and guitar.jpg. But when I try to run this line in the command window I get "File "guitar.jpg" does not exist."
>> guitar = imread('guitar.jpg');
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Walter Roberson
Walter Roberson 2021 年 9 月 10 日
What shows up if you do
if ispc()
projectdir = '.';
else
projectdir = fullfile(matlabroot, 'toolbox', 'images', 'imdata');
end
cd(projectdir)
dinfo = dir('*.jpg');
filenames = {dinfo.name};
n = length(filenames);
fprintf('%d files found:\n\n', n);
38 files found:
for K = 1 : n
fprintf('|%s| which is character codes: %s\n', filenames{K}, mat2str(double(filenames{K})));
end
|baby.jpg| which is character codes: [98 97 98 121 46 106 112 103] |car1.jpg| which is character codes: [99 97 114 49 46 106 112 103] |car2.jpg| which is character codes: [99 97 114 50 46 106 112 103] |car_1.jpg| which is character codes: [99 97 114 95 49 46 106 112 103] |car_2.jpg| which is character codes: [99 97 114 95 50 46 106 112 103] |car_3.jpg| which is character codes: [99 97 114 95 51 46 106 112 103] |car_4.jpg| which is character codes: [99 97 114 95 52 46 106 112 103] |colorCheckerTestImage.jpg| which is character codes: [99 111 108 111 114 67 104 101 99 107 101 114 84 101 115 116 73 109 97 103 101 46 106 112 103] |eSFRTestImage.jpg| which is character codes: [101 83 70 82 84 101 115 116 73 109 97 103 101 46 106 112 103] |flamingos.jpg| which is character codes: [102 108 97 109 105 110 103 111 115 46 106 112 103] |foggyroad.jpg| which is character codes: [102 111 103 103 121 114 111 97 100 46 106 112 103] |foggysf1.jpg| which is character codes: [102 111 103 103 121 115 102 49 46 106 112 103] |foggysf2.jpg| which is character codes: [102 111 103 103 121 115 102 50 46 106 112 103] |foosball.jpg| which is character codes: [102 111 111 115 98 97 108 108 46 106 112 103] |football.jpg| which is character codes: [102 111 111 116 98 97 108 108 46 106 112 103] |greens.jpg| which is character codes: [103 114 101 101 110 115 46 106 112 103] |hallway.jpg| which is character codes: [104 97 108 108 119 97 121 46 106 112 103] |hands1.jpg| which is character codes: [104 97 110 100 115 49 46 106 112 103] |hands2.jpg| which is character codes: [104 97 110 100 115 50 46 106 112 103] |indiancorn.jpg| which is character codes: [105 110 100 105 97 110 99 111 114 110 46 106 112 103] |llama.jpg| which is character codes: [108 108 97 109 97 46 106 112 103] |lowlight_1.jpg| which is character codes: [108 111 119 108 105 103 104 116 95 49 46 106 112 103] |lowlight_2.jpg| which is character codes: [108 111 119 108 105 103 104 116 95 50 46 106 112 103] |micromarket.jpg| which is character codes: [109 105 99 114 111 109 97 114 107 101 116 46 106 112 103] |office_1.jpg| which is character codes: [111 102 102 105 99 101 95 49 46 106 112 103] |office_2.jpg| which is character codes: [111 102 102 105 99 101 95 50 46 106 112 103] |office_3.jpg| which is character codes: [111 102 102 105 99 101 95 51 46 106 112 103] |office_4.jpg| which is character codes: [111 102 102 105 99 101 95 52 46 106 112 103] |office_5.jpg| which is character codes: [111 102 102 105 99 101 95 53 46 106 112 103] |office_6.jpg| which is character codes: [111 102 102 105 99 101 95 54 46 106 112 103] |parkavenue.jpg| which is character codes: [112 97 114 107 97 118 101 110 117 101 46 106 112 103] |peacock.jpg| which is character codes: [112 101 97 99 111 99 107 46 106 112 103] |sevilla.jpg| which is character codes: [115 101 118 105 108 108 97 46 106 112 103] |sherlock.jpg| which is character codes: [115 104 101 114 108 111 99 107 46 106 112 103] |strawberries.jpg| which is character codes: [115 116 114 97 119 98 101 114 114 105 101 115 46 106 112 103] |trailer.jpg| which is character codes: [116 114 97 105 108 101 114 46 106 112 103] |wagon.jpg| which is character codes: [119 97 103 111 110 46 106 112 103] |yellowlily.jpg| which is character codes: [121 101 108 108 111 119 108 105 108 121 46 106 112 103]
The character codes allow you to check what character codes are really in the file name. For example there might be a space in the file name, which would show up as code 32. Or there might be a non-breaking zero-width whitespace character, which would show up as a code 8203 https://en.wikipedia.org/wiki/Zero-width_space

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回答 (1 件)

Image Analyst
Image Analyst 2021 年 9 月 10 日
It should work. Check the spelling. Are you on a mac? Maybe it's guitar.jpeg. Try this:
fileList = dir('g*.*') % Listing of all files starting with g.
fileNames = {fileList.name} % Extract all names from structure into cell array.
What do you see in the command window?
  1 件のコメント
Image Analyst
Image Analyst 2021 年 9 月 10 日
Oops - basically the same as Walter's comment above.

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