Reading RAW camera file

I am trying to import camera raw file in the Matlab and do further processing.

I read the article: http://blogs.mathworks.com/steve/2011/03/08/tips-for-reading-a-camera-raw-file-into-matlab/#comments. But something is going wrong.

A piece of my code, where I read the file information:

fdir='C:\Users\gilpinheiro\Documents\AmScope'; fname='20161209122048.dng'; imgname = sprintf('%s\\%s',fdir,fname); meta_info = imfinfo(imgname);

The meta_info variable follows. There is no SubIFDs structure, referenced in the Steve blog:

                     Filename: 'C:\Users\gilpinheiro\Documents\AmScope\201612091220…'
                  FileModDate: '09-dez-2016 14:20:50'
                     FileSize: 6577874
                       Format: 'tif'
                FormatVersion: []
                        Width: 4096
                       Height: 3286
                     BitDepth: 8
                    ColorType: 'CFA'
              FormatSignature: [73 73 42 0]
                    ByteOrder: 'little-endian'
               NewSubFileType: 0
                BitsPerSample: 8
                  Compression: 'JPEG'
    PhotometricInterpretation: 'CFA'
                 StripOffsets: []
              SamplesPerPixel: 1
                 RowsPerStrip: 4.2950e+09
              StripByteCounts: []
                  XResolution: []
                  YResolution: []
               ResolutionUnit: 'Inch'
                     Colormap: []
          PlanarConfiguration: 'Chunky'
                    TileWidth: 352
                   TileLength: 368
                  TileOffsets: [1x108 double]
               TileByteCounts: [1x108 double]
                  Orientation: 1
                    FillOrder: 1
             GrayResponseUnit: 0.0100
               MaxSampleValue: 255
               MinSampleValue: 0
                 Thresholding: 1
                       Offset: 8
                        Model: 'MU1403(USB2.0)'
                     DateTime: '2016:12:09 12:20:48'
                          XMP: '<?xpacket begin="￯ﾻ﾿" id="W5M0MpCehiHzreSzNTczkc9d"…'
                DigitalCamera: [1x1 struct]
                   DNGVersion: [1 4 0 0]
           DNGBackwardVersion: [1 1 0 0]
            UniqueCameraModel: 'MU1403(USB2.0)'
                CFAPlaneColor: [0 1 2]
                    CFALayout: 1
          BlackLevelRepeatDim: [1 1]
                   BlackLevel: 0
                   WhiteLevel: 255
                 DefaultScale: [1 1]
            DefaultCropOrigin: [0 0]
              DefaultCropSize: [4096 3286]
                 ColorMatrix1: [1 0 0 0 1 0 0 0 1]
                AnalogBalance: [1 1 1]
                AsShotNeutral: [1 1 1]
             BaselineExposure: -1
                BaselineNoise: 1
            BaselineSharpness: 1
              BayerGreenSplit: 0
           LinearResponseUnit: 1
            AntiAliasStrength: 1
                  ShadowScale: 1
       CalibrationIlluminant1: 21
             BestQualityScale: 1
           AliasLayerMetadata: [1x16 double]
                  UnknownTags: [9x1 struct]