how to open the filename in thisstatement "filename = 'output.bmp'"

filename = 'output.bmp'

[Image Analyst]

This is really basic stuff. If you want a tutorial of other basic stuff you'll need to do image processing, see my image segmentation tutorial "BlobsDemo": http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862 It does basic blob detection and measurement.

Answer 1

[Wayne King]

With imread?

im = imread(filename);

The folder containing output.bmp has to be on the MATLAB path.

[Image Analyst]

Vinayak, it's good practice to use exist and fullfile

fullFileName = fullfile(folder, 'output.bmp');
if exist(fullFileName, 'file')
  % File exists, read it in.
  imageArray = imread(fullFileName);
else
  % Not there - alert the user.
  warningMessage = sprintf('Image file not found:\n%s', fullFileName);
  uiwait(warndlg(warningMessage));
  imageArray  = [];  % Create a null array (avoids certain other errors).
end

folder obviously holds a string that is the folder name where your image file lives.

Answer 2

[Thomas]

Do you want to read it or display it..

to read it put it into a variable, (make sure output.bmp is on the path or in current directory)

 filename = 'output.bmp'

 ii=imread(filename);

 %to display after being read

 imshow(ii)