ANALISIS TERHADAP KOMPONEN MULTIMEDIA

Sekarang saya akan melakukan uji coba analisis terhadap salah satu komponen multimedia. Dengan membandingkan 2 foto yang sama, yang di dapat di ketahui mana yang asli dan mana foto yang sudah di ubah.

Gambar 1

Gambar 2

 

Pertama kita lakukan uji coba secara sederhana pada gambar 1. Cara sederhana untuk mengetahui properties gambar pertama adalah “klik kanan – properties – details” dan akan di temukan info gambar seperti ini

Untuk lebih meyakinkan jika gambar 1 asli, kita lakukan uji coba dengan menggunakan tools JPEGSnoop. Ini hasil dari gambar 1

EXIF IFD0 @ Absolute 0x00000014

    Dir Length = 0x000B

    [Make                                ] = "Canon"

    [Model                               ] = "Canon EOS 600D"

    [Orientation                         ] = Row 0: top, Col 0: left

    [XResolution                         ] = 72/1

    [YResolution                         ] = 72/1

    [ResolutionUnit                      ] = Inch

    [DateTime                            ] = "2013:11:24 09:45:21"

    [Artist                              ] = ""

    [YCbCrPositioning                    ] = Co-sited

    [Copyright                           ] = ""

    [ExifOffset                          ] = @ 0x015C

    Offset to Next IFD = 0x00002276

  EXIF IFD1 @ Absolute 0x00002282

    Dir Length = 0x0006

    [Compression                         ] = JPEG

    [XResolution                         ] = 72/1

    [YResolution                         ] = 72/1

    [ResolutionUnit                      ] = Inch

    [JpegIFOffset                        ] = @ +0x22D4 = @ 0x22E0

    [JpegIFByteCount                     ] = 10608

    Offset to Next IFD = 0x00000000

  EXIF SubIFD @ Absolute 0x00000168

    Dir Length = 0x0026

    [ExposureTime                        ] = 1/250 s

    [FNumber                             ] = F10.0

    [ExposureProgram                     ] = Not defined

    [ISOSpeedRatings                     ] = 100

    [ExifVersion                         ] = 02.30

    [DateTimeOriginal                    ] = "2013:11:24 09:45:21"

    [DateTimeDigitized                   ] = "2013:11:24 09:45:21"

    [ComponentsConfiguration             ] = [Y Cb Cr .]

    [ShutterSpeedValue                   ] = 524288/65536

    [ApertureValue                       ] = 434176/65536

    [ExposureBiasValue                   ] = 0.00 eV

    [MeteringMode                        ] = Pattern

    [Flash                               ] = Flash did not fire

    [FocalLength                         ] = 42 mm

      Excessive # components (7436). Limiting to first 4000.

    [MakerNote                           ] = @ 0x0382

    [UserComment                         ] = ""

    [SubSecTime                          ] = "43"

    [SubSecTimeOriginal                  ] = "43"

    [SubSecTimeDigitized                 ] = "43"

    [FlashPixVersion                     ] = 01.00

    [ColorSpace                          ] = sRGB

    [ExifImageWidth                      ] = 5184

    [ExifImageHeight                     ] = 3456

    [ExifInteroperabilityOffset          ] = @ 0x2196

    [FocalPlaneXResolution               ] = 5184000/905

    [FocalPlaneYResolution               ] = 3456000/595

    [FocalPlaneResolutionUnit            ] = Inch

    [CustomRendered                      ] = Normal process

    [ExposureMode                        ] = Auto exposure

    [WhiteBalance                        ] = Auto white balance

    [SceneCaptureType                    ] = Standard

Untuk pengujian gambar 2 juga bisa dilakukan dengan cara sederhana. Gambar 2 telah diedit menggunakan photoscape. Cara sederhana untuk mengetahui properties gambar pertama adalah “klik kanan – properties – details” dan akan di temukan info gambar seperti ini

Untuk meyakinkan jika gambar 2 telah di edit menggunakan photoscape, dilakukan pengujian menggunakan JPEGSnoop. Ini hasil dari gambar 2

EXIF IFD0 @ Absolute 0x00000026

    Dir Length = 0x000B

    [Make                                ] = "Canon"

    [Model                               ] = "Canon EOS 600D"

    [XResolution                         ] = 72/1

    [YResolution                         ] = 72/1

    [ResolutionUnit                      ] = Inch

    [Software                            ] = "PhotoScape"

    [DateTime                            ] = "2013:11:24 09:45:21"

    [Artist                              ] = ""

    [YCbCrPositioning                    ] = Co-sited

    [Copyright                           ] = ""

    [ExifOffset                          ] = @ 0x00D8

    Offset to Next IFD = 0x00000000

  EXIF SubIFD @ Absolute 0x000000F6

    Dir Length = 0x0026

    [ExposureTime                        ] = 1/250 s

    [FNumber                             ] = F10.0

    [ExposureProgram                     ] = Not defined

    [ISOSpeedRatings                     ] = 100

    [ExifVersion                         ] = 02.30

    [DateTimeOriginal                    ] = "2013:11:24 09:45:21"

    [DateTimeDigitized                   ] = "2013:11:24 09:45:21"

    [ComponentsConfiguration             ] = [Y Cb Cr .]

    [ShutterSpeedValue                   ] = 524288/65536

    [ApertureValue                       ] = 434176/65536

    [ExposureBiasValue                   ] = 0.00 eV

    [MeteringMode                        ] = Pattern

    [Flash                               ] = Flash did not fire

    [FocalLength                         ] = 42 mm

      Excessive # components (6896). Limiting to first 4000.

    [MakerNote                           ] = @ 0x02FE

    [UserComment                         ] = ""

    [SubSecTime                          ] = "43"

    [SubSecTimeOriginal                  ] = "43"

    [SubSecTimeDigitized                 ] = "43"

    [FlashPixVersion                     ] = 01.00

    [ColorSpace                          ] = sRGB

    [ExifImageWidth                      ] = 5184

    [ExifImageHeight                     ] = 3456

    [ExifInteroperabilityOffset          ] = @ 0x1FA6

    [FocalPlaneXResolution               ] = 5184000/905

    [FocalPlaneYResolution               ] = 3456000/595

    [FocalPlaneResolutionUnit            ] = Inch

    [CustomRendered                      ] = Normal process

    [ExposureMode                        ] = Auto exposure

    [WhiteBalance                        ] = Auto white balance

    [SceneCaptureType                    ] = Standard