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|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- (this file generated automatically by Image::ExifTool::BuildTagLookup) -->
<head>
<title>JPEG Tags</title>
<link rel=stylesheet type='text/css' href='style.css' title='Style'>
</head>
<body>
<h2 class=top>JPEG Tags</h2>
<p>This table lists information extracted by ExifTool from JPEG images. See
<a href="https://www.w3.org/Graphics/JPEG/jfif3.pdf">https://www.w3.org/Graphics/JPEG/jfif3.pdf</a> for the JPEG specification.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Tag ID</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td>'APP0'</td>
<td>JFIF
<br>JFXX
<br>CIFF
<br>AVI1
<br>Ocad</td>
<td class=c>-<br>-<br>-<br>-<br>-</td>
<td>--> <a href='JFIF.html'>JFIF Tags</a>
<br>--> <a href='JFIF.html#Extension'>JFIF Extension Tags</a>
<br>--> <a href='CanonRaw.html'>CanonRaw Tags</a>
<br>--> <a href='JPEG.html#AVI1'>JPEG AVI1 Tags</a>
<br>--> <a href='JPEG.html#Ocad'>JPEG Ocad Tags</a></td></tr>
<tr class=b>
<td>'APP1'</td>
<td>EXIF
<br>ExtendedXMP
<br>XMP
<br>QVCI
<br>FLIR
<br>RawThermalImage</td>
<td class=c>-<br>-<br>-<br>-<br>-<br>no</td>
<td>--> <a href='EXIF.html'>EXIF Tags</a>
<br>--> <a href='XMP.html'>XMP Tags</a>
<br>--> <a href='XMP.html'>XMP Tags</a>
<br>--> <a href='Casio.html#QVCI'>Casio QVCI Tags</a>
<br>--> <a href='FLIR.html#FFF'>FLIR FFF Tags</a>
<br><span class=n>(thermal image from Parrot Bebop-Pro Thermal drone)</span></td></tr>
<tr>
<td>'APP2'</td>
<td>ICC_Profile
<br>FPXR
<br>MPF
<br>InfiRayVersion
<br>PreviewImage</td>
<td class=c>-<br>-<br>-<br>-<br>no</td>
<td>--> <a href='ICC_Profile.html'>ICC_Profile Tags</a>
<br>--> <a href='FlashPix.html'>FlashPix Tags</a>
<br>--> <a href='MPF.html'>MPF Tags</a>
<br>--> <a href='InfiRay.html#Version'>InfiRay Version Tags</a>
<br><span class=n>(Samsung APP2 preview image)</span></td></tr>
<tr class=b>
<td>'APP3'</td>
<td>Meta
<br>Stim
<br>JPS
<br>ThermalData
<br>ImagingData
<br>PreviewImage</td>
<td class=c>-<br>-<br>-<br>no<br>no<br>no</td>
<td>--> <a href='Kodak.html#Meta'>Kodak Meta Tags</a>
<br>--> <a href='Stim.html'>Stim Tags</a>
<br>--> <a href='JPEG.html#JPS'>JPEG JPS Tags</a>
<br><span class=n>(DJI raw thermal data)</span>
<br><span class=n>(InfiRay IR+thermal+visible data)</span>
<br><span class=n>(Samsung/HP preview image)</span></td></tr>
<tr>
<td>'APP4'</td>
<td>Scalado
<br>FPXR
<br>InfiRayFactory
<br>ThermalParams
<br>PreviewImage</td>
<td class=c>-<br>-<br>-<br>-<br>no</td>
<td>--> <a href='Scalado.html'>Scalado Tags</a>
<br>--> <a href='FlashPix.html'>FlashPix Tags</a>
<br>--> <a href='InfiRay.html#Factory'>InfiRay Factory Tags</a>
<br>--> <a href='DJI.html#ThermalParams'>DJI ThermalParams Tags</a>
<br><span class=n>(continued from APP3)</span></td></tr>
<tr class=b>
<td>'APP5'</td>
<td>RMETA
<br>SamsungUniqueID
<br>InfiRayPicture
<br>ThermalCalibration
<br>PreviewImage</td>
<td class=c>-<br>-<br>-<br>no<br>no</td>
<td>--> <a href='Ricoh.html#RMETA'>Ricoh RMETA Tags</a>
<br>--> <a href='Samsung.html#APP5'>Samsung APP5 Tags</a>
<br>--> <a href='InfiRay.html#Picture'>InfiRay Picture Tags</a>
<br><span class=n>(DJI thermal calibration data)</span>
<br><span class=n>(continued from APP4)</span></td></tr>
<tr>
<td>'APP6'</td>
<td>EPPIM
<br>NITF
<br>HP_TDHD
<br>GoPro
<br>InfiRayMixMode
<br>DJI_DTAT</td>
<td class=c>-<br>-<br>-<br>-<br>-<br>no</td>
<td>--> <a href='JPEG.html#EPPIM'>JPEG EPPIM Tags</a>
<br>--> <a href='JPEG.html#NITF'>JPEG NITF Tags</a>
<br>--> <a href='HP.html#TDHD'>HP TDHD Tags</a>
<br>--> <a href='GoPro.html#GPMF'>GoPro GPMF Tags</a>
<br>--> <a href='InfiRay.html#MixMode'>InfiRay MixMode Tags</a>
<br><span class=n>(DJI Thermal Analysis Tool record)</span></td></tr>
<tr class=b>
<td>'APP7'</td>
<td>Pentax
<br>Huawei
<br>Qualcomm
<br>InfiRayOpMode</td>
<td class=c>-<br>-<br>-<br>-</td>
<td>--> <a href='Pentax.html'>Pentax Tags</a>
<br>--> <a href='Unknown.html'>Unknown Tags</a>
<br>--> <a href='Qualcomm.html'>Qualcomm Tags</a>
<br>--> <a href='InfiRay.html#OpMode'>InfiRay OpMode Tags</a></td></tr>
<tr>
<td>'APP8'</td>
<td>SPIFF
<br>InfiRayIsothermal</td>
<td class=c>-<br>-</td>
<td>--> <a href='JPEG.html#SPIFF'>JPEG SPIFF Tags</a>
<br>--> <a href='InfiRay.html#Isothermal'>InfiRay Isothermal Tags</a></td></tr>
<tr class=b>
<td>'APP9'</td>
<td>MediaJukebox
<br>InfiRaySensor</td>
<td class=c>-<br>-</td>
<td>--> <a href='JPEG.html#MediaJukebox'>JPEG MediaJukebox Tags</a>
<br>--> <a href='InfiRay.html#Sensor'>InfiRay Sensor Tags</a></td></tr>
<tr>
<td>'APP10'</td>
<td>Comment</td>
<td class=c>no</td>
<td><span class=s><span class=n>(PhotoStudio Unicode comment)</span></span></td></tr>
<tr class=b>
<td>'APP11'</td>
<td>JPEG-HDR
<br>JUMBF</td>
<td class=c>-<br>-</td>
<td>--> <a href='JPEG.html#HDR'>JPEG HDR Tags</a>
<br>--> <a href='Jpeg2000.html'>Jpeg2000 Tags</a></td></tr>
<tr>
<td>'APP12'</td>
<td>PictureInfo
<br>Ducky</td>
<td class=c>-<br>-</td>
<td>--> <a href='APP12.html#PictureInfo'>APP12 PictureInfo Tags</a>
<br>--> <a href='APP12.html#Ducky'>APP12 Ducky Tags</a></td></tr>
<tr class=b>
<td>'APP13'</td>
<td>Photoshop
<br>Adobe_CM</td>
<td class=c>-<br>-</td>
<td>--> <a href='Photoshop.html'>Photoshop Tags</a>
<br>--> <a href='JPEG.html#AdobeCM'>JPEG AdobeCM Tags</a></td></tr>
<tr>
<td>'APP14'</td>
<td>Adobe</td>
<td class=c>yes</td>
<td>--> <a href='JPEG.html#Adobe'>JPEG Adobe Tags</a></td></tr>
<tr class=b>
<td>'APP15'</td>
<td>GraphicConverter</td>
<td class=c>-</td>
<td>--> <a href='JPEG.html#GraphConv'>JPEG GraphConv Tags</a></td></tr>
<tr>
<td>'COM'</td>
<td>Comment</td>
<td class=c>yes</td>
<td> </td></tr>
<tr class=b>
<td>'DQT'</td>
<td>DefineQuantizationTable</td>
<td class=c>no</td>
<td><span class=s><span class=n>(used to calculate the Extra JPEGDigest tag value)</span></span></td></tr>
<tr>
<td>'SOF'</td>
<td>StartOfFrame</td>
<td class=c>-</td>
<td>--> <a href='JPEG.html#SOF'>JPEG SOF Tags</a></td></tr>
<tr class=b>
<td>'Trailer'</td>
<td>AFCP
<br>CanonVRD
<br>FotoStation
<br>PhotoMechanic
<br>MIE
<br>Samsung
<br>EmbeddedVideo
<br>Insta360
<br>NikonApp
<br>PreviewImage</td>
<td class=c>-<br>-<br>-<br>-<br>-<br>-<br>no<br>no<br>no<br>yes</td>
<td>--> <a href='AFCP.html'>AFCP Tags</a>
<br>--> <a href='CanonVRD.html'>CanonVRD Tags</a>
<br>--> <a href='FotoStation.html'>FotoStation Tags</a>
<br>--> <a href='PhotoMechanic.html'>PhotoMechanic Tags</a>
<br>--> <a href='MIE.html'>MIE Tags</a>
<br>--> <a href='Samsung.html#Trailer'>Samsung Trailer Tags</a>
<br><span class=n>(extracted only when ExtractEmbedded option is used)</span>
<br><span class=n>(contains editing information in XMP format)</span></td></tr>
</table></td></tr></table></blockquote>
<h2><a name='AVI1'>JPEG AVI1 Tags</a></h2>
<p>This information may be found in APP0 of JPEG image data from AVI videos.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Index1</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td class=r title='0 = 0x0'>0</td>
<td>InterleavedField</td>
<td class=c>no</td>
<td><span class=s>0 = Not Interleaved
<br>1 = Odd
<br>2 = Even</span></td></tr>
</table></td></tr></table></blockquote>
<h2><a name='Ocad'>JPEG Ocad Tags</a></h2>
<p>Tags extracted from the JPEG APP0 "Ocad" segment (found in Photobucket
images).</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Tag ID</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td>'Rev'</td>
<td>OcadRevision</td>
<td class=c>no</td>
<td> </td></tr>
</table></td></tr></table></blockquote>
<h2><a name='JPS'>JPEG JPS Tags</a></h2>
<p>Tags found in JPEG Stereo (JPS) images.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Index1</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td class=r title='10 = 0xa'>10</td>
<td>JPSSeparation</td>
<td class=c>no</td>
<td><span class=s><span class=n>(stereo only)</span></span></td></tr>
<tr class=b>
<td class=r title='11 = 0xb'>11</td>
<td>JPSFlags</td>
<td class=c>no</td>
<td><span class=s>Bit 0 = Half height
<br>Bit 1 = Half width
<br>Bit 2 = Left field first</span></td></tr>
<tr>
<td class=r title='12 = 0xc'>12</td>
<td>JPSLayout</td>
<td class=c>no</td>
<td><span class=s><span class=n>(mono)</span>
<br>0 = Both Eyes
<br>1 = Left Eye
<br>2 = Right Eye
<br><span class=n>(stereo)</span>
<br>1 = Interleaved
<br>2 = Side By Side
<br>3 = Over Under
<br>4 = Anaglyph</span></td></tr>
<tr class=b>
<td class=r title='13 = 0xd'>13</td>
<td>JPSType</td>
<td class=c>no</td>
<td><span class=s>0 = Mono
<br>1 = Stereo</span></td></tr>
<tr>
<td class=r title='16 = 0x10'>16</td>
<td>JPSComment</td>
<td class=c>no</td>
<td> </td></tr>
</table></td></tr></table></blockquote>
<h2><a name='EPPIM'>JPEG EPPIM Tags</a></h2>
<p>APP6 is used in by the Toshiba PDR-M700 to store a TIFF structure containing
PrintIM information.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Tag ID</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td title='0xc4a5 = 50341'>0xc4a5</td>
<td>PrintIM</td>
<td class=c>-</td>
<td>--> <a href='PrintIM.html'>PrintIM Tags</a></td></tr>
</table></td></tr></table></blockquote>
<h2><a name='NITF'>JPEG NITF Tags</a></h2>
<p>Information in APP6 used by the National Imagery Transmission Format. See
<a href="http://www.gwg.nga.mil/ntb/baseline/docs/n010697/bwcguide25aug98.pdf">http://www.gwg.nga.mil/ntb/baseline/docs/n010697/bwcguide25aug98.pdf</a> for
the official specification.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Index1</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td class=r title='0 = 0x0'>0</td>
<td>NITFVersion</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td class=r title='2 = 0x2'>2</td>
<td>ImageFormat</td>
<td class=c>no</td>
<td><span class=s>'B' = IMode B</span></td></tr>
<tr>
<td class=r title='3 = 0x3'>3</td>
<td>BlocksPerRow</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td class=r title='5 = 0x5'>5</td>
<td>BlocksPerColumn</td>
<td class=c>no</td>
<td> </td></tr>
<tr>
<td class=r title='7 = 0x7'>7</td>
<td>ImageColor</td>
<td class=c>no</td>
<td><span class=s>0 = Monochrome</span></td></tr>
<tr class=b>
<td class=r title='8 = 0x8'>8</td>
<td>BitDepth</td>
<td class=c>no</td>
<td> </td></tr>
<tr>
<td class=r title='9 = 0x9'>9</td>
<td>ImageClass</td>
<td class=c>no</td>
<td><span class=s>0 = General Purpose
<br>4 = Tactical Imagery</span></td></tr>
<tr class=b>
<td class=r title='10 = 0xa'>10</td>
<td>JPEGProcess</td>
<td class=c>no</td>
<td><span class=s>1 = Baseline sequential DCT, Huffman coding, 8-bit samples
<br>4 = Extended sequential DCT, Huffman coding, 12-bit samples</span></td></tr>
<tr>
<td class=r title='11 = 0xb'>11</td>
<td>Quality</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td class=r title='12 = 0xc'>12</td>
<td>StreamColor</td>
<td class=c>no</td>
<td><span class=s>0 = Monochrome</span></td></tr>
<tr>
<td class=r title='13 = 0xd'>13</td>
<td>StreamBitDepth</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td class=r title='14 = 0xe'>14</td>
<td>Flags</td>
<td class=c>no</td>
<td> </td></tr>
</table></td></tr></table></blockquote>
<h2><a name='SPIFF'>JPEG SPIFF Tags</a></h2>
<p>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). See <a href="http://www.jpeg.org/public/spiff.pdf">http://www.jpeg.org/public/spiff.pdf</a> for the official
specification.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Index1</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td class=r title='0 = 0x0'>0</td>
<td>SPIFFVersion</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td class=r title='2 = 0x2'>2</td>
<td>ProfileID</td>
<td class=c>no</td>
<td><span class=s>0 = Not Specified
<br>1 = Continuous-tone Base
<br>2 = Continuous-tone Progressive
<br>3 = Bi-level Facsimile
<br>4 = Continuous-tone Facsimile</span></td></tr>
<tr>
<td class=r title='3 = 0x3'>3</td>
<td>ColorComponents</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td class=r title='6 = 0x6'>6</td>
<td>ImageHeight</td>
<td class=c>no</td>
<td><span class=s><span class=n>(at index 4 in specification, but there are 2 extra bytes here in my only
SPIFF sample, version 1.2)</span></span></td></tr>
<tr>
<td class=r title='10 = 0xa'>10</td>
<td>ImageWidth</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td class=r title='14 = 0xe'>14</td>
<td>ColorSpace</td>
<td class=c>no</td>
<td><table class=cols><tr>
<td>0 = Bi-level
<br>1 = YCbCr, ITU-R BT 709, video
<br>2 = No color space specified
<br>3 = YCbCr, ITU-R BT 601-1, RGB
<br>4 = YCbCr, ITU-R BT 601-1, video
<br>8 = Gray-scale
<br>9 = PhotoYCC
<br>10 = RGB
<br>11 = CMY
<br>12 = CMYK
<br>13 = YCCK
<br>14 = CIELab</td></tr></table>
</td></tr>
<tr>
<td class=r title='15 = 0xf'>15</td>
<td>BitsPerSample</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td class=r title='16 = 0x10'>16</td>
<td>Compression</td>
<td class=c>no</td>
<td><table class=cols><tr>
<td>0 = Uncompressed, interleaved, 8 bits per sample
<br>1 = Modified Huffman
<br>2 = Modified READ
<br>3 = Modified Modified READ
<br>4 = JBIG
<br>5 = JPEG</td></tr></table>
</td></tr>
<tr>
<td class=r title='17 = 0x11'>17</td>
<td>ResolutionUnit</td>
<td class=c>no</td>
<td><span class=s>0 = None
<br>1 = inches
<br>2 = cm</span></td></tr>
<tr class=b>
<td class=r title='18 = 0x12'>18</td>
<td>YResolution</td>
<td class=c>no</td>
<td> </td></tr>
<tr>
<td class=r title='22 = 0x16'>22</td>
<td>XResolution</td>
<td class=c>no</td>
<td> </td></tr>
</table></td></tr></table></blockquote>
<h2><a name='MediaJukebox'>JPEG MediaJukebox Tags</a></h2>
<p>Tags found in the XML metadata of the APP9 "Media Jukebox" segment.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td>Album</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td>Caption</td>
<td class=c>no</td>
<td> </td></tr>
<tr>
<td>Date</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td>Keywords</td>
<td class=c>no</td>
<td> </td></tr>
<tr>
<td>Name</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td>People</td>
<td class=c>no</td>
<td> </td></tr>
<tr>
<td>Places</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td>Tool_Name</td>
<td class=c>no</td>
<td> </td></tr>
<tr>
<td>Tool_Version</td>
<td class=c>no</td>
<td> </td></tr>
</table></td></tr></table></blockquote>
<h2><a name='HDR'>JPEG HDR Tags</a></h2>
<p>Information extracted from APP11 of a JPEG-HDR image.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Tag ID</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td>'RatioImage'</td>
<td>RatioImage</td>
<td class=c>no</td>
<td><span class=s><span class=n>(the embedded JPEG-compressed ratio image)</span></span></td></tr>
<tr class=b>
<td>'alp'</td>
<td>Alpha</td>
<td class=c>no</td>
<td> </td></tr>
<tr>
<td>'bet'</td>
<td>Beta</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td>'cor'</td>
<td>CorrectionMethod</td>
<td class=c>no</td>
<td> </td></tr>
<tr>
<td>'ln0'</td>
<td>Ln0</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td>'ln1'</td>
<td>Ln1</td>
<td class=c>no</td>
<td> </td></tr>
<tr>
<td>'s2n'</td>
<td>S2n</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td>'ver'</td>
<td>JPEG-HDRVersion</td>
<td class=c>no</td>
<td> </td></tr>
</table></td></tr></table></blockquote>
<h2><a name='AdobeCM'>JPEG AdobeCM Tags</a></h2>
<p>The APP13 "Adobe_CM" segment presumably contains color management
information, but the meaning of the data is currently unknown. If anyone
has an idea about what this means, please let me know.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Index2</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td class=r title='0 = 0x0'>0</td>
<td>AdobeCMType</td>
<td class=c>no</td>
<td> </td></tr>
</table></td></tr></table></blockquote>
<h2><a name='Adobe'>JPEG Adobe Tags</a></h2>
<p>The APP14 "Adobe" segment stores image encoding information for DCT filters.
This segment may be copied or deleted as a block using the Extra "Adobe"
tag, but note that it is not deleted by default when deleting all metadata
because it may affect the appearance of the image.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Index2</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td class=r title='0 = 0x0'>0</td>
<td>DCTEncodeVersion</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td class=r title='1 = 0x1'>1</td>
<td>APP14Flags0</td>
<td class=c>no</td>
<td><span class=s>0x0 = (none)
<br>Bit 15 = Encoded with Blend=1 downsampling</span></td></tr>
<tr>
<td class=r title='2 = 0x2'>2</td>
<td>APP14Flags1</td>
<td class=c>no</td>
<td><span class=s>0x0 = (none)</span></td></tr>
<tr class=b>
<td class=r title='3 = 0x3'>3</td>
<td>ColorTransform</td>
<td class=c>no</td>
<td><span class=s>0 = Unknown (RGB or CMYK)
<br>1 = YCbCr
<br>2 = YCCK</span></td></tr>
</table></td></tr></table></blockquote>
<h2><a name='GraphConv'>JPEG GraphConv Tags</a></h2>
<p>APP15 is used by GraphicConverter to store JPEG quality.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Tag ID</th><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td>'Q'</td>
<td>Quality</td>
<td class=c>no</td>
<td> </td></tr>
</table></td></tr></table></blockquote>
<h2><a name='SOF'>JPEG SOF Tags</a></h2>
<p>This information is extracted from the JPEG Start Of Frame segment.</p>
<blockquote>
<table class=frame><tr><td>
<table class=inner cellspacing=1>
<tr class=h><th>Tag Name</th>
<th>Writable</th><th>Values / <span class=n>Notes</span></th></tr>
<tr>
<td>BitsPerSample</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td>ColorComponents</td>
<td class=c>no</td>
<td> </td></tr>
<tr>
<td>EncodingProcess</td>
<td class=c>no</td>
<td><span class=s>0x0 = Baseline DCT, Huffman coding
<br>0x1 = Extended sequential DCT, Huffman coding
<br>0x2 = Progressive DCT, Huffman coding
<br>0x3 = Lossless, Huffman coding
<br>0x5 = Sequential DCT, differential Huffman coding
<br>0x6 = Progressive DCT, differential Huffman coding
<br>0x7 = Lossless, Differential Huffman coding
<br>0x9 = Extended sequential DCT, arithmetic coding
<br>0xa = Progressive DCT, arithmetic coding
<br>0xb = Lossless, arithmetic coding
<br>0xd = Sequential DCT, differential arithmetic coding
<br>0xe = Progressive DCT, differential arithmetic coding
<br>0xf = Lossless, differential arithmetic coding</span></td></tr>
<tr class=b>
<td>ImageHeight</td>
<td class=c>no</td>
<td> </td></tr>
<tr>
<td>ImageWidth</td>
<td class=c>no</td>
<td> </td></tr>
<tr class=b>
<td>YCbCrSubSampling</td>
<td class=c>no</td>
<td><span class=s><span class=n>(calculated from components table)</span></span><table class=cols><tr>
<td>'1 1' = YCbCr4:4:4 (1 1)
<br>'1 2' = YCbCr4:4:0 (1 2)
<br>'1 4' = YCbCr4:4:1 (1 4)
<br>'2 1' = YCbCr4:2:2 (2 1)
<br>'2 2' = YCbCr4:2:0 (2 2)
<br>'2 4' = YCbCr4:2:1 (2 4)
<br>'4 1' = YCbCr4:1:1 (4 1)
<br>'4 2' = YCbCr4:1:0 (4 2)</td></tr></table>
</td></tr>
</table></td></tr></table></blockquote>
<hr>
(This document generated automatically by Image::ExifTool::BuildTagLookup)
<br><i>Last revised Feb 9, 2023</i>
<p class=lf><a href='index.html'><-- ExifTool Tag Names</a></p>
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