Problem with cell2mat "Cannot support cell arrays containing cell arrays or objects."

I am trying to run a pseudocode, which needs to run on a complete dataset of images. Name of the dataset is MICC-F220. The path of the dataset is 'C:\Users\parminder\Downloads\sift-forensic-master\sift-forensic-master\dataset'. I have following lines to process each image of the dataset.

% RUN EXPERIMENT

tstart = tic;

% dataset
DB = 'MICC-F220';
db_dir ='C:\Users\parminder\Downloads\sift-forensic-master\sift-forensic-master\dataset';
file_ground_truth = 'groundtruthDB_220.txt';

% parameters
metric = 'ward';
th = 2.2;
min_pts = 4;

% load ground truth from a file
[ImageName, GT] = textread(fullfile(db_dir,DB,file_ground_truth), '%s %d');
num_images = size(ImageName,1);
fid_gt = fopen(fullfile(db_dir,DB,file_ground_truth));
C = textscan(fid_gt, '%s %u');
fclose(fid_gt);

TP = 0;   % True Positive
TN = 0;   % True Negative
FP = 0;   % False Positive
FN = 0;   % False Negative

for i = 1:num_images
%parfor i = 1:num_images   % use for parallel computation (needs matlabpool)

      loc_file = fullfile(db_dir,DB,cell2mat(ImageName(i)));
      name = cell2mat(ImageName(i)); 

      % process an image
      fprintf('Processing: %s (%d/%d)\n',loc_file,i,num_images);
      countTrasfGeom = process_image(loc_file, metric, th, min_pts, 0);

......and so on

I am getting the following error

   >>run_F220_experiment
  Error using cell2mat (line 53)
  Cannot support cell arrays containing cell arrays or objects.

Error in run_F220_experiment (line 30)
    loc_file = fullfile(db_dir,DB,cell2mat(ImageName(i)));

How can i resolve it.

Answer 1

[Image Analyst]

Maybe ImageName is already a string and you don't need cell2mat. Or maybe you can do char(ImageName{i}) or ImageName{i} (braces instead of parentheses). See the FAQ: http://matlab.wikia.com/wiki/FAQ#What_is_a_cell_array.3F.

[harpreet]

Thank you image analyst Error resolves using 'ImageName{i}'.

[Akshay Koli]

hey..could you solve your problem of running this code ? @harpreet

[Image Analyst]

Apparently so, since he accepted my proposed solution.

Answer 2

[Matt J]

It is complaining that ImageName(i) does not contain a data type that cell2mat can handle. Check the content of ImageName{i} and re-evaluate whether cell2mat is the appropriate tool.

[harpreet]

thanks Matt J

[Faiza Bukenya]

Thanks Matt