Imread list image from file text

Dear everyone,

I'm new MM, i have code would like read list image from file txt .

my txt file as :

0010\0010_01_05_03_115.jpg 85.680000 90.720000 158.760000 95.760000 118.440000 128.520000

0010\0010_01_05_03_121.jpg 60.480000 98.280000 163.800000 93.240000 126.000000 123.480000

0010\0010_01_05_03_125.jpg 63.000000 88.200000 161.280000 85.680000 123.480000 115.920000

my code as below:

CTrain = importdata('./database/AA/ctrain.txt');

CTrainNo = size(CTrain, 1);

for i = 1 : CTrainNo

ClTrain = imread(['./database/AA/Client/' CTrain{i}]);

imwrite(ClTrain, ['.\database\AA\train\bb\' num2str(i-1, '%05d') '.png']);

end

But have error :

" Brace indexing is not supported for variables of this type." . From " ClTrain = imread(['./database/AA/Client/' CTrain{i}]);"

Pls help me,

thankyou so much!

Answer 1

[Akhilesh Yadav]

Hi Jacky,

It is my understanding that you are new to MATLAB and trying to read text file using ‘importdata’ function. As per your ‘ctrain.txt’ file content your first column contains text data(file name and location) and when you are reading this file using ‘importdata’ function, CTrain object of type struct is created with three fields(data,textdata,rowheaders). Where your file name stored in rowheaders and textdata of CTrain object and you can access those values using dot notation.

The following solution fix issue in your code

CTrain = importdata('./database/AA/ctrain.txt');
CTrainNo = size(CTrain.textdata, 1);
for i = 1 : CTrainNo
    ClTrain = imread(['./database/AA/Client/' CTrain.textdata{i}]);
    imwrite(ClTrain, ['.\database\AA\train\bb\' num2str(i-1, '%05d') '.png']);
end

Please refer to the importdata, readtable documentation for more information on how to work with text file.

Hope this will help you.