2. Check How the Image Appears in the Workspace :: Getting Started (Image Processing Toolbox User's Guide)

Image Processing Toolbox User's Guide

2. Check How the Image Appears in the Workspace

To see how the imread function stores the image data in the workspace, check the Workspace browser in the MATLAB desktop. The Workspace browser displays information about all the variables you create during a MATLAB session. The imread function returned the image data in the variable I, which is a 291-by-240 element array of uint8 data. MATLAB can store images as uint8, uint16, or double arrays.

You can also get information about variables in the workspace by calling the whos command.

whos
Name      Size         Bytes  Class

  I       291x240        69840  uint8 array

Grand total is 69840 elements using 69840 bytes

For more information about image storage classes, see Reading a Graphics Image.

Example 1 -- Some Basic Concepts 3. Improve Image Contrast