Edit metadata in .tif file

Hello all,

I'm pretty new to matlab and am still learning, but I have encountered a problem with imwrite. I have a stacked tif file generated in the software metamorph. The images are of cells. The stack often drifts in x-y and another student wrote an alignment script that uses imwrite to create a new aligned stack. The problem is that the new stack has no metadata associated with it. I've tried to use imfinfo to create a variable with the correct info and apply it to the new stack. I've only succeeded to change the ImageDescription with a short word. For example ImageDescription: 'ainfo'.

 Filename: [1x30 char]
                      FileModDate: '15-Jul-2013 13:03:53'
                         FileSize: 2019425
                           Format: 'tif'
                    FormatVersion: []
                            Width: 1004
                           Height: 1002
                         BitDepth: 16
                        ColorType: 'grayscale'
                  FormatSignature: [73 73 42 0]
                        ByteOrder: 'little-endian'
                   NewSubFileType: 2
                    BitsPerSample: 16
                      Compression: 'Uncompressed'
        PhotometricInterpretation: 'BlackIsZero'
                     StripOffsets: [251x1 double]
                  SamplesPerPixel: 1
                     RowsPerStrip: 4
                  StripByteCounts: [251x1 double]
                      XResolution: []
                      YResolution: []
                   ResolutionUnit: 'None'
                         Colormap: []
              PlanarConfiguration: 'Chunky'
                        TileWidth: []
                       TileLength: []
                      TileOffsets: []
                   TileByteCounts: []
                      Orientation: 1
                        FillOrder: 1
                 GrayResponseUnit: 0.0100
                   MaxSampleValue: 65535
                   MinSampleValue: 0
                     Thresholding: 1
                           Offset: 2012024
                 ImageDescription: [1x5137 char]
                         Software: 'MetaSeries'
                         DateTime: '20130626 20:00:31.67'

    To: 

    Filename: [1x31 char]
                      FileModDate: '15-Jul-2013 12:53:37'
                       FileSize: 525226
                         Format: 'tif'
                  FormatVersion: []
                          Width: 512
                         Height: 512
                       BitDepth: 16
                      ColorType: 'grayscale'
                FormatSignature: [73 73 42 0]
                      ByteOrder: 'little-endian'
                 NewSubFileType: 0
                  BitsPerSample: 16
                    Compression: 'Uncompressed'
      PhotometricInterpretation: 'BlackIsZero'
                   StripOffsets: [32x1 double]
                SamplesPerPixel: 1
                   RowsPerStrip: 16
                StripByteCounts: [32x1 double]
                    XResolution: 72
                    YResolution: 72
                 ResolutionUnit: 'Inch'
                       Colormap: []
            PlanarConfiguration: 'Chunky'
                      TileWidth: []
                     TileLength: []
                    TileOffsets: []
                 TileByteCounts: []
                    Orientation: 1
                      FillOrder: 1
               GrayResponseUnit: 0.0100
                 MaxSampleValue: 65535
                 MinSampleValue: 0
                   Thresholding: 1
                         Offset: 524762
               ImageDescription: 'ainfo'

What I'd like to is take the imfinfo from the orginal stack (or to start an original single frame image) and apply it to the new image/stack. I've tried things like:

ainfo = imfinfo('a.tif'); t = Tiff('a.tif', 'r+'); tagStruct.ImageDescription = ainfo ; t.setTag(tagStruct)

But I seem to be doing something wrong.

Any help is much appreciate and if more info is needed to help me out please let me know.

Thanks

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