How to upload groundTruth?

I have a question regarding my image recognition project.

I downloaded labeled images. I now have a filemap containg .jpg (images) and .txt files (coordinates of the box).

Example 123_456.jpg, and 123_456.txt.

Txt files contain for ex.:

0 0.578964870010237 0.553121683650408 0.130052151238592 0.24380704041721.

Furthermore I have a structure containing the following info:

Name, Folder, Date, Bytses, Isdir and datenum

How can I merge all coordinates and all names into one struct/matrix?

I want to make a groundTruth with the following function:

gTruth = groundTruth(dataSource,labelDefs,labelData);

Answer 1

[Saffan]

Hi Thijs,

You can use “readmatrix” method to extract the coordinates from the text files and “fileparts” method to extract the name of the images and store them in a structure. Here is an example code snippet:

for i = 1:numberOfFiles 
    % Read the .txt file and extract the coordinates 
    coordinates = readmatrix(txtFilePath(i)); 
    
    % Extract the image name from the file path 
    [~, imageName, ~] = fileparts(imageFilePath(i)); 
   
    % Append the name and coordinates to the mergedData struct 
    mergedData(end+1).Name = imageName; 
    mergedData(end).Coordinates = coordinates; 
end 

Please refer this for more information:

• https://www.mathworks.com/help/releases/R2023a/matlab/ref/readmatrix.html
• https://www.mathworks.com/help/releases/R2023a/matlab/ref/fileparts.html