Programming

Getting Information About Graphics Files

If you have a file in a standard graphics format, use the imfinfo function to get information about its contents. The imfinfo function returns a structure containing information about the file. The fields in the structure vary with the file format but imfinfo always returns some basic information including filename, last modification date, file size, and format.

This example returns information about a file in Joint Photographic Experts Group (JPEG) format:

• info = imfinfo('ngc6543a.jpg')
  
  info = 
  
             Filename: [1x57 char]
          FileModDate: '01-Oct-1996 16:19:44'
             FileSize: 27387
               Format: 'jpg'
        FormatVersion: ''
                Width: 600
               Height: 650
             BitDepth: 24
            ColorType: 'truecolor'
      FormatSignature: ''
      NumberOfSamples: 3
         CodingMethod: 'Huffman'
        CodingProcess: 'Sequential'
              Comment: {[1x69 char]}
  

Working with Graphics Files

Importing Graphics Data

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