1. 彩色图像
>>aa=imfinfo('0000-c1.jpg')
aa =
           Filename: 'C：\matlab程序\ 201101002 \ 0000-c1.jpg'
        FileModDate: '03-Nov-2012 18:14:23'
           FileSize: 50138
             Format: 'jpg'
      FormatVersion: ''
              Width: 640
             Height: 480
           BitDepth: 24
          ColorType: 'truecolor'
    FormatSignature: ''
    NumberOfSamples: 3
       CodingMethod: 'Huffman'
      CodingProcess: 'Sequential'
            Comment: {}
>> Name=aa.Filename
Name =
C:\matlab程序\ 201101002 \ 0000-c1.jpg'

2. 黑白图像
>>  aa=imfinfo('0002-c1.jpg')
aa =
           Filename: 'C:\201101002\0002-c1.jpg'
        FileModDate: '03-Nov-2012 18:42:51'
           FileSize: 40832
             Format: 'jpg'
      FormatVersion: ''
              Width: 640
             Height: 480
           BitDepth: 8
          ColorType: 'grayscale'
    FormatSignature: ''
    NumberOfSamples: 1
       CodingMethod: 'Huffman'
      CodingProcess: 'Sequential'
            Comment: {}