Adobe Photoshop TIFF

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showImageTags: Identify file AdobeTgt_Lab.tif:
AdobeTgt_Lab.tif Size{3030524) is TIFF format, littleEndian, version(42)
Parse TIFF Head: [littleEndian], base(0). position(8), entries(25), level(0)
tiff ISO NewSubFileType Primary Image IFD found (raw image?)
tiff ISO ImageWidth: (800)
tiff ISO ImageHeight: (548)
tiff ISO Bits Per Sample: (3) 8, 8, 8
tiff ISO Compression: (1): NONE
tiff ISO PhotoMetric Interpretation: (8) CIELAB
tiff ISO Strip Offsets(image data): N(1) 20510
tiff ISO Samples Per Pixel: (3) RGB or YCbCr
tiff ISO Rows Per Strip: (548)
tiff ISO Strip Byte Counts(image data): N(1) 1315200
tiff ISO PlanerConfig (1): Chunky format
tiff ISO Date Time: 2005:04:16 09:45:45
TIFF --- Unknown Type(13) Tag: 330
Parse TIFF Head: [littleEndian], base(0). position(2619132), entries(14), level(1)
tiff ISO NewSubFileType Alternate Image IFD found
tiff ISO ImageWidth: (400)
tiff ISO ImageHeight: (274)
tiff ISO Bits Per Sample: (3) 8, 8, 8
tiff ISO Compression: (1): NONE
tiff ISO PhotoMetric Interpretation: (8) CIELAB
tiff ISO Strip Offsets(image data): N(1) 2619328
tiff ISO Samples Per Pixel: (3) RGB or YCbCr
tiff ISO Rows Per Strip: (274)
tiff ISO Strip Byte Counts(image data): N(1) 328800
tiff ISO PlanerConfig (1): Chunky format
tiff Adobe XMP data: Size(7782)
tiff ISO Copyright: .. Rags Int., Inc. 2005
tiff --- ISO IPTC DataType(ulong), Lth(77), position(540) Invalid
iptc 2:120 Caption: Type[string], Lth(14), Value No Camera Data
iptc 2:122 WriterEditor: Type[string], Lth(15), Value UpdatePsInfo.js
iptc 2:105 Headline: Type[string], Lth(67), Value Rags Int., Inc. 204 Trailwood Drive Euless, TX 76039 (817) 267-2554
iptc 2:080 Byline: Type[string], Lth(12), Value Rags Gardner
iptc 2:110 Credit: Type[string], Lth(12), Value Rags Gardner
iptc 2:115 Source: Type[string], Lth(26), Value MacbethTarget_Gray_Lab.psd
iptc 2:005 ObjectName: Type[string], Lth(20), Value Rags Inc Photography
iptc 2:055 DateCreated: Type[date], Lth(8), Value 20050416
iptc 2:090 City: Type[string], Lth(6), Value Euless
iptc 2:095 State: Type[string], Lth(5), Value Texas
iptc 2:101 CountryName: Type[string], Lth(3), Value USA
iptc 2:025 Keywords: Type[string], Lth(7), Value ragsinc
iptc 2:025 Keywords: Type[string], Lth(12), Value unclassified
iptc 2:116 CopyrightNotice: Type[string], Lth(22), Value  Rags Int., Inc. 2005
tiff EXIF IFD Pointer Lth(1) position(1335712)
Parse EXIF Head: [littleEndian], base(0). position(1335712), entries(3)
exif Color Space: (65535) Uncalibrated
TIFF --- Unknown Tag: 37724, type(7), len(1283372)
AdobeTgt_Lab.tif, unknown camera image created on 2005:04:16 09:45:45
Format[TIFF 6.0], ByteOrder[littleEndian], Pixels/Sensors(548x800), BitDepth(8)
TiffTags(39), TiffIfdCount(2), ExifTags(3), MakerNoteTags(0), IptcTags(14), XmpTags(1), CiffTags(0)
Unknown Tags: TIFF(1), EXIF(0)
Count of valid Tags with invalid  type or value(2)

This image did not come from any camera.   It was created from a new document in Adobe Photoshop CS.   It is simply a color checker chart in the CIE Lab color space.

The unknown/invalid type (13) is in the SubIFD pointer for the primary image.   If this tag was ignored, there would be no image data.

The TIFF/IPTC tag is a long dataType instead of byte or undefined.   Since the data is actually a block of bytes, the length must be multiplied by four to parse the data correctly.   The IPTC data shown here came from the Photoshop Information panels.   Note that the copyright symbol does not display correctly in this parser.

This image also contains Adobe XMP metadata.   I am not parsing this yet, but it is on my list of enhancements.

There one unknown TIFF tag and there are two with invalid types.   And this is from Adobe, the owner of this TIFF standard.


Rags Gardner
Rags Int., Inc.
204 Trailwood Drive
Euless, TX 76039
(817) 267-2554
Send Email
www.rags-int-inc.com
July 15, 2005

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