Error in reading image files from folder before cropping them

Hi

i am getting an error while reading the image(.png) files from folder before cropping it.

code:

imageDir = ('/Users/apple/Documents/MSCPROJ/database/savedimages/*.ng');
ssss = imageSet(imageDir);
for k = 5 : ssss.Count
  theImage = imread(ssss);
  croppedImage = imcrop(theImage,[646, 1291, 481, 600]);
  baseFileName = sprintf('Image #%d.png', k);
  fullFileName = fullfile(imageDir, baseFileName);
  imwrite(croppedImage, fullFileName);
end

Errors:

>> cropimage

Error using imageSet/parseDirInput (line 131)

Input, imageLocation, must be a valid folder name or a cell array of image file locations.

Error in imageSet/parseInput (line 101)

this = this.parseDirInput(varargin{:});

Answer 1

[Walter Roberson]

You cannot specify a wildcard when using imageSet() . You can only specify a directory name, or an exact list of files. If you specify the directory name, you have no control over the file extension.

imageSet() is not recommended; imageDatastore is recommended instead. imageDatastore has a 'FileExtensions' option that permits you to specify the file extensions.