JPEG Tags

This table lists information extracted by ExifTool from JPEG images.

Tag ID Tag Name Writable Values / Notes 'APP0' JFIF JFXX CIFF - - - --> JFIF Tags --> JFIF Extension Tags --> CanonRaw Tags 'APP1' EXIF XMP - - --> EXIF Tags --> XMP Tags 'APP2' ICC_Profile FPXR - - --> ICC_Profile Tags --> FlashPix Tags 'APP3' Meta - --> Kodak Meta Tags 'APP5' RMETA - --> Ricoh RMETA Tags 'APP6' EPPIM - --> JPEG APP6 Tags 'APP8' SPIFF - --> JPEG APP8 Tags 'APP10' Comment N (PhotoStudio Unicode comment) 'APP12' PictureInfo Ducky - - --> APP12 Tags --> APP12 Ducky Tags 'APP13' Photoshop - --> Photoshop Tags 'APP14' Adobe - --> JPEG APP14 Tags 'APP15' GraphicConverter - --> JPEG APP15 Tags 'COM' Comment Y   'SOF' StartOfFrame - --> JPEG SOF Tags 'Trailer' AFCP CanonVRD FotoStation PhotoMechanic MIE PreviewImage - - - - - Y --> AFCP Tags --> CanonVRD Tags --> FotoStation Tags --> PhotoMechanic Tags --> MIE Tags

JPEG APP6 Tags

APP6 is used in by the Toshiba PDR-M700 to store a TIFF structure containing PrintIM information.

Tag ID Tag Name Writable Values / Notes 0xc4a5 PrintIM undef --> PrintIM Tags

JPEG APP8 Tags

This information is found in APP8 of SPIFF-style JPEG images (the "official" yet rarely used JPEG file format standard: Still Picture Interchange File Format).

Index Tag Name Writable Values / Notes 0 SPIFFVersion N   2 ProfileID N 0 = Not Specified 1 = Continuous-tone Base 2 = Continuous-tone Progressive 3 = Bi-level Facsimile 4 = Continuous-tone Facsimile 3 ColorComponents N   6 ImageHeight N (at index 4 in specification, but there are 2 extra bytes here in my only SPIFF sample, version 1.2) 10 ImageWidth N   14 ColorSpace N 0 = Bi-level 1 = YCbCr, ITU-R BT 709, video 2 = No color space specified 3 = YCbCr, ITU-R BT 601-1, RGB 4 = YCbCr, ITU-R BT 601-1, video 8 = Gray-scale 9 = PhotoYCC 10 = RGB 11 = CMY 12 = CMYK 13 = YCCK 14 = CIELab 15 BitsPerSample N   16 Compression N 0 = Uncompressed, interleaved, 8 bits per sample 1 = Modified Huffman 2 = Modified READ 3 = Modified Modified READ 4 = JBIG 5 = JPEG 17 ResolutionUnit N 0 = None 1 = inches 2 = cm 18 YResolution N   22 XResolution N

JPEG APP14 Tags

The "Adobe" APP14 segment stores image encoding information for DCT filters.

Index Tag Name Writable Values / Notes 0 DCTEncodeVersion N   1 APP14Flags0 N Bit 15 = Encoded with Blend=1 downsampling 2 APP14Flags1 N   3 ColorTransform N 0 = Unknown (RGB or CMYK) 1 = YCbCr 2 = YCCK

JPEG APP15 Tags

APP15 is used by GraphicConverter to store JPEG quality.

Tag ID Tag Name Writable Values / Notes 'Q' Quality N

JPEG SOF Tags

This information is extracted from the JPEG Start Of Frame segment.

Tag Name Writable Values / Notes BitsPerSample N   ColorComponents N   EncodingProcess N 0x0 = Baseline DCT, Huffman coding 0x1 = Extended sequential DCT, Huffman coding 0x2 = Progressive DCT, Huffman coding 0x3 = Lossless, Huffman coding 0x5 = Sequential DCT, differential Huffman coding 0x6 = Progressive DCT, differential Huffman coding 0x7 = Lossless, Differential Huffman coding 0x9 = Extended sequential DCT, arithmetic coding 0xa = Progressive DCT, arithmetic coding 0xb = Lossless, arithmetic coding 0xd = Sequential DCT, differential arithmetic coding 0xe = Progressive DCT, differential arithmetic coding 0xf = Lossless, differential arithmetic coding ImageHeight N   ImageWidth N   YCbCrSubSampling N (calculated from components table) '1 1' = YCbCr4:4:4 (1 1) '1 2' = YCbCr4:4:0 (1 2) '2 1' = YCbCr4:2:2 (2 1) '2 2' = YCbCr4:2:0 (2 2) '4 1' = YCbCr4:1:1 (4 1) '4 2' = YCbCr4:1:0 (4 2)

<-- ExifTool Tag Names