I have written simple debug code for printing out PropertyItems in System.Drawing.Image object.
The key part of the code:
- mapping between Id property of PropertyItem and description of associated to the property item.
- decode PropertyItem value (byte array) to human readable format string
The code itself will be shown at the bottom of this post.
Below is a sample image which will be passed to the program and the corresponding output generated by the program.
Property Item 1 Id: 0x10e Type: 2 Length: 17 bytes Type String: ASCII Descriotion: PropertyTagImageDescription Value : MetaData Example Property Item 2 Id: 0x131 Type: 2 Length: 7 bytes Type String: ASCII Descriotion: PropertyTagSoftwareUsed Value : Picasa Property Item 3 Id: 0x9000 Type: 7 Length: 4 bytes Type String: Undefined Descriotion: PropertyTagExifVer Value : Property Item 4 Id: 0xa002 Type: 4 Length: 4 bytes Type String: Long (32 bit int) Descriotion: PropertyTagExifPixXDim Value : 1440 Property Item 5 Id: 0xa003 Type: 4 Length: 4 bytes Type String: Long (32 bit int) Descriotion: PropertyTagExifPixYDim Value : 1440 Property Item 6 Id: 0xa420 Type: 2 Length: 33 bytes Type String: ASCII Descriotion: Unknown Value : 199e785efd74401dff564baa559c2f25 Property Item 7 Id: 0x9c9b Type: 1 Length: 34 bytes Type String: Array of bytes Descriotion: Unknown Value : 77,0,101,0,116,0,97,0,68,0,97,0,116,0,97,0,32,0,69,0,120,0,97,0,109,0,112,0,108,0,101,0,0,0 Property Item 8 Id: 0x9c9c Type: 1 Length: 28 bytes Type String: Array of bytes Descriotion: Unknown Value : 84,0,101,0,115,0,116,0,32,0,67,0,111,0,109,0,109,0,101,0,110,0,116,0,115,0,0,0 Property Item 9 Id: 0x501b Type: 1 Length: 6780 bytes Type String: Array of bytes Descriotion: PropertyTagThumbnailData Value : 255,216,255,219,0,67,0,8,6,6,7,6,5,8,7,7,7,9,9,8,10,12,20,13,12,11,11,12,25,18,19,15,20,29,26,31,30,... Property Item 10 Id: 0x5023 Type: 3 Length: 2 bytes Type String: Short (16 bit int) Descriotion: PropertyTagThumbnailCompression Value : 6 Property Item 11 Id: 0x502d Type: 5 Length: 8 bytes Type String: Rational Descriotion: PropertyTagThumbnailResolutionX Value : 72,1 Property Item 12 Id: 0x502e Type: 5 Length: 8 bytes Type String: Rational Descriotion: PropertyTagThumbnailResolutionY Value : 72,1 Property Item 13 Id: 0x5030 Type: 3 Length: 2 bytes Type String: Short (16 bit int) Descriotion: PropertyTagThumbnailResolutionUnit Value : 2 Property Item 14 Id: 0x201 Type: 4 Length: 4 bytes Type String: Long (32 bit int) Descriotion: PropertyTagJPEGInterFormat Value : 4488 Property Item 15 Id: 0x202 Type: 4 Length: 4 bytes Type String: Long (32 bit int) Descriotion: PropertyTagJPEGInterLength Value : 6780 Property Item 16 Id: 0x5091 Type: 3 Length: 128 bytes Type String: Short (16 bit int) Descriotion: PropertyTagChrominanceTable Value : 5,5,7,14,30,30,30,30,5,6,8,20,30,30,30,30,7,8,17,30,30,30,30,30,14,20,30,30,30,30,30,30,30,30,30,30,... Property Item 17 Id: 0x5090 Type: 3 Length: 128 bytes Type String: Short (16 bit int) Descriotion: PropertyTagLuminanceTableThe thread 'vshost.RunParkingWindow' (0x8a0) has exited with code 0 (0x0). Value : 5,3,3,5,7,12,15,18,4,4,4,6,8,17,18,17,4,4,5,7,12,17,21,17,4,5,7,9,15,26,24,19,5,7,11,17,20,33,31,23,...
Code for Printing Out PropertyItem
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
namespace Utility
{
public static class ImagePropertyUtils
{
/// <summary>
/// http://msdn.microsoft.com/en-us/library/xddt0dz7%28v=vs.110%29.aspx
/// </summary>
public static void PrintProperties(this Image image)
{
// Get the PropertyItems property from image.
var propItems = image.PropertyItems;
// For each PropertyItem in the array, display the ID, type, and length.
int count = 0;
foreach (var propItem in propItems)
{
count++;
// raw data
Console.WriteLine("Property Item " + count.ToString());
Console.WriteLine(" Id: 0x" + propItem.Id.ToString("x"));
Console.WriteLine(" Type: " + propItem.Type.ToString());
Console.WriteLine(" Length: " + propItem.Len.ToString() + " bytes");
// human readable string
Console.WriteLine(" Type String: " + PropItemToTypeString[propItem.Type]);
Console.WriteLine(" Descriotion: " + (PropItemIdToDescriotionString.ContainsKey(propItem.Id) ? PropItemIdToDescriotionString[propItem.Id]: "Unknown"));
Console.WriteLine(" Value : " + propItem.ReadPropertValueAsString().Trim(100));
}
}
const int BYTES = 1;
const int ASCII = 2;
const int SHORT = 3;
const int LONG = 4;
const int RATIONAL = 5;
const int SLONG = 9;
const int SRATIONAL = 10;
/// <summary>
/// According to http://msdn.microsoft.com/en-us/library/system.drawing.imaging.propertyitem.type(v=vs.110).aspx
/// </summary>
private readonly static Dictionary<int, string> PropItemToTypeString = new Dictionary<int, string>()
{
{BYTES, "Array of bytes"},
{ASCII, "ASCII"},
{SHORT, "Short (16 bit int)"},
{LONG, "Long (32 bit int)"},
{RATIONAL, "Rational"},
{6, "Not Used"},
{7, "Undefined"},
{8, "Not Used"},
{SLONG, "SLong"},
{SRATIONAL, "SRational"}
};
/// <summary>
/// According to http://msdn.microsoft.com/de-de/library/ms534416.aspx
/// </summary>
private readonly static Dictionary<int, string> PropItemIdToDescriotionString = new Dictionary<int, string>()
{
{0x013B, "PropertyTagArtist"},
{0x0102, "PropertyTagBitsPerSample"},
{0x0109, "PropertyTagCellHeight"},
{0x0108, "PropertyTagCellWidth"},
{0x5091, "PropertyTagChrominanceTable"},
{0x0140, "PropertyTagColorMap"},
{0x501A, "PropertyTagColorTransferFunction"},
{0x0103, "PropertyTagCompression"},
{0x8298, "PropertyTagCopyright"},
{0x0132, "PropertyTagDateTime"},
{0x010D, "PropertyTagDocumentName"},
{0x0150, "PropertyTagDotRange"},
{0x010F, "PropertyTagEquipMake"},
{0x0110, "PropertyTagEquipModel"},
{0x9202, "PropertyTagExifAperture"},
{0x9203, "PropertyTagExifBrightness"},
{0xA302, "PropertyTagExifCfaPattern"},
{0xA001, "PropertyTagExifColorSpace"},
{0x9102, "PropertyTagExifCompBPP"},
{0x9101, "PropertyTagExifCompConfig"},
{0x9004, "PropertyTagExifDTDigitized"},
{0x9292, "PropertyTagExifDTDigSS"},
{0x9003, "PropertyTagExifDTOrig"},
{0x9291, "PropertyTagExifDTOrigSS"},
{0x9290, "PropertyTagExifDTSubsec"},
{0x9204, "PropertyTagExifExposureBias"},
{0xA215, "PropertyTagExifExposureIndex"},
{0x8822, "PropertyTagExifExposureProg"},
{0x829A, "PropertyTagExifExposureTime"},
{0xA300, "PropertyTagExifFileSource"},
{0x9209, "PropertyTagExifFlash"},
{0xA20B, "PropertyTagExifFlashEnergy"},
{0x829D, "PropertyTagExifFNumber"},
{0x920A, "PropertyTagExifFocalLength"},
{0xA210, "PropertyTagExifFocalResUnit"},
{0xA20E, "PropertyTagExifFocalXRes"},
{0xA20F, "PropertyTagExifFocalYRes"},
{0xA000, "PropertyTagExifFPXVer"},
{0x8769, "PropertyTagExifIFD"},
{0xA005, "PropertyTagExifInterop"},
{0x8827, "PropertyTagExifISOSpeed"},
{0x9208, "PropertyTagExifLightSource"},
{0x927C, "PropertyTagExifMakerNote"},
{0x9205, "PropertyTagExifMaxAperture"},
{0x9207, "PropertyTagExifMeteringMode"},
{0x8828, "PropertyTagExifOECF"},
{0xA002, "PropertyTagExifPixXDim"},
{0xA003, "PropertyTagExifPixYDim"},
{0xA004, "PropertyTagExifRelatedWav"},
{0xA301, "PropertyTagExifSceneType"},
{0xA217, "PropertyTagExifSensingMethod"},
{0x9201, "PropertyTagExifShutterSpeed"},
{0xA20C, "PropertyTagExifSpatialFR"},
{0x8824, "PropertyTagExifSpectralSense"},
{0x9206, "PropertyTagExifSubjectDist"},
{0xA214, "PropertyTagExifSubjectLoc"},
{0x9286, "PropertyTagExifUserComment"},
{0x9000, "PropertyTagExifVer"},
{0x0152, "PropertyTagExtraSamples"},
{0x010A, "PropertyTagFillOrder"},
{0x5100, "PropertyTagFrameDelay"},
{0x0121, "PropertyTagFreeByteCounts"},
{0x0120, "PropertyTagFreeOffset"},
{0x0301, "PropertyTagGamma"},
{0x5102, "PropertyTagGlobalPalette"},
{0x0006, "PropertyTagGpsAltitude"},
{0x0005, "PropertyTagGpsAltitudeRef"},
{0x0018, "PropertyTagGpsDestBear"},
{0x0017, "PropertyTagGpsDestBearRef"},
{0x001A, "PropertyTagGpsDestDist"},
{0x0019, "PropertyTagGpsDestDistRef"},
{0x0014, "PropertyTagGpsDestLat"},
{0x0013, "PropertyTagGpsDestLatRef"},
{0x0016, "PropertyTagGpsDestLong"},
{0x0015, "PropertyTagGpsDestLongRef"},
{0x000B, "PropertyTagGpsGpsDop"},
{0x000A, "PropertyTagGpsGpsMeasureMode"},
{0x0008, "PropertyTagGpsGpsSatellites"},
{0x0009, "PropertyTagGpsGpsStatus"},
{0x0007, "PropertyTagGpsGpsTime"},
{0x8825, "PropertyTagGpsIFD"},
{0x0011, "PropertyTagGpsImgDir"},
{0x0010, "PropertyTagGpsImgDirRef"},
{0x0002, "PropertyTagGpsLatitude"},
{0x0001, "PropertyTagGpsLatitudeRef"},
{0x0004, "PropertyTagGpsLongitude"},
{0x0003, "PropertyTagGpsLongitudeRef"},
{0x0012, "PropertyTagGpsMapDatum"},
{0x000D, "PropertyTagGpsSpeed"},
{0x000C, "PropertyTagGpsSpeedRef"},
{0x000F, "PropertyTagGpsTrack"},
{0x000E, "PropertyTagGpsTrackRef"},
{0x0000, "PropertyTagGpsVer"},
{0x0123, "PropertyTagGrayResponseCurve"},
{0x0122, "PropertyTagGrayResponseUnit"},
{0x5011, "PropertyTagGridSize"},
{0x500C, "PropertyTagHalftoneDegree"},
{0x0141, "PropertyTagHalftoneHints"},
{0x500A, "PropertyTagHalftoneLPI"},
{0x500B, "PropertyTagHalftoneLPIUnit"},
{0x500E, "PropertyTagHalftoneMisc"},
{0x500F, "PropertyTagHalftoneScreen"},
{0x500D, "PropertyTagHalftoneShape"},
{0x013C, "PropertyTagHostComputer"},
{0x8773, "PropertyTagICCProfile"},
{0x0302, "PropertyTagICCProfileDescriptor"},
{0x010E, "PropertyTagImageDescription"},
{0x0101, "PropertyTagImageHeight"},
{0x0320, "PropertyTagImageTitle"},
{0x0100, "PropertyTagImageWidth"},
{0x5103, "PropertyTagIndexBackground"},
{0x5104, "PropertyTagIndexTransparent"},
{0x014D, "PropertyTagInkNames"},
{0x014C, "PropertyTagInkSet"},
{0x0209, "PropertyTagJPEGACTables"},
{0x0208, "PropertyTagJPEGDCTables"},
{0x0201, "PropertyTagJPEGInterFormat"},
{0x0202, "PropertyTagJPEGInterLength"},
{0x0205, "PropertyTagJPEGLosslessPredictors"},
{0x0206, "PropertyTagJPEGPointTransforms"},
{0x0200, "PropertyTagJPEGProc"},
{0x0207, "PropertyTagJPEGQTables"},
{0x5010, "PropertyTagJPEGQuality"},
{0x0203, "PropertyTagJPEGRestartInterval"},
{0x5101, "PropertyTagLoopCount"},
{0x5090, "PropertyTagLuminanceTable"},
{0x0119, "PropertyTagMaxSampleValue"},
{0x0118, "PropertyTagMinSampleValue"},
{0x00FE, "PropertyTagNewSubfileType"},
{0x014E, "PropertyTagNumberOfInks"},
{0x0112, "PropertyTagOrientation"},
{0x011D, "PropertyTagPageName"},
{0x0129, "PropertyTagPageNumber"},
{0x5113, "PropertyTagPaletteHistogram"},
{0x0106, "PropertyTagPhotometricInterp"},
{0x5111, "PropertyTagPixelPerUnitX"},
{0x5112, "PropertyTagPixelPerUnitY"},
{0x5110, "PropertyTagPixelUnit"},
{0x011C, "PropertyTagPlanarConfig"},
{0x013D, "PropertyTagPredictor"},
{0x013F, "PropertyTagPrimaryChromaticities"},
{0x5005, "PropertyTagPrintFlags"},
{0x5008, "PropertyTagPrintFlagsBleedWidth"},
{0x5009, "PropertyTagPrintFlagsBleedWidthScale"},
{0x5007, "PropertyTagPrintFlagsCrop"},
{0x5006, "PropertyTagPrintFlagsVersion"},
{0x0214, "PropertyTagREFBlackWhite"},
{0x0128, "PropertyTagResolutionUnit"},
{0x5003, "PropertyTagResolutionXLengthUnit"},
{0x5001, "PropertyTagResolutionXUnit"},
{0x5004, "PropertyTagResolutionYLengthUnit"},
{0x5002, "PropertyTagResolutionYUnit"},
{0x0116, "PropertyTagRowsPerStrip"},
{0x0153, "PropertyTagSampleFormat"},
{0x0115, "PropertyTagSamplesPerPixel"},
{0x0155, "PropertyTagSMaxSampleValue"},
{0x0154, "PropertyTagSMinSampleValue"},
{0x0131, "PropertyTagSoftwareUsed"},
{0x0303, "PropertyTagSRGBRenderingIntent"},
{0x0117, "PropertyTagStripBytesCount"},
{0x0111, "PropertyTagStripOffsets"},
{0x00FF, "PropertyTagSubfileType"},
{0x0124, "PropertyTagT4Option"},
{0x0125, "PropertyTagT6Option"},
{0x0151, "PropertyTagTargetPrinter"},
{0x0107, "PropertyTagThreshHolding"},
{0x5034, "PropertyTagThumbnailArtist"},
{0x5022, "PropertyTagThumbnailBitsPerSample"},
{0x5015, "PropertyTagThumbnailColorDepth"},
{0x5019, "PropertyTagThumbnailCompressedSize"},
{0x5023, "PropertyTagThumbnailCompression"},
{0x503B, "PropertyTagThumbnailCopyRight"},
{0x501B, "PropertyTagThumbnailData"},
{0x5033, "PropertyTagThumbnailDateTime"},
{0x5026, "PropertyTagThumbnailEquipMake"},
{0x5027, "PropertyTagThumbnailEquipModel"},
{0x5012, "PropertyTagThumbnailFormat"},
{0x5014, "PropertyTagThumbnailHeight"},
{0x5025, "PropertyTagThumbnailImageDescription"},
{0x5021, "PropertyTagThumbnailImageHeight"},
{0x5020, "PropertyTagThumbnailImageWidth"},
{0x5029, "PropertyTagThumbnailOrientation"},
{0x5024, "PropertyTagThumbnailPhotometricInterp"},
{0x502F, "PropertyTagThumbnailPlanarConfig"},
{0x5016, "PropertyTagThumbnailPlanes"},
{0x5036, "PropertyTagThumbnailPrimaryChromaticities"},
{0x5017, "PropertyTagThumbnailRawBytes"},
{0x503A, "PropertyTagThumbnailRefBlackWhite"},
{0x5030, "PropertyTagThumbnailResolutionUnit"},
{0x502D, "PropertyTagThumbnailResolutionX"},
{0x502E, "PropertyTagThumbnailResolutionY"},
{0x502B, "PropertyTagThumbnailRowsPerStrip"},
{0x502A, "PropertyTagThumbnailSamplesPerPixel"},
{0x5018, "PropertyTagThumbnailSize"},
{0x5032, "PropertyTagThumbnailSoftwareUsed"},
{0x502C, "PropertyTagThumbnailStripBytesCount"},
{0x5028, "PropertyTagThumbnailStripOffsets"},
{0x5031, "PropertyTagThumbnailTransferFunction"},
{0x5035, "PropertyTagThumbnailWhitePoint"},
{0x5013, "PropertyTagThumbnailWidth"},
{0x5037, "PropertyTagThumbnailYCbCrCoefficients"},
{0x5039, "PropertyTagThumbnailYCbCrPositioning"},
{0x5038, "PropertyTagThumbnailYCbCrSubsampling"},
{0x0145, "PropertyTagTileByteCounts"},
{0x0143, "PropertyTagTileLength"},
{0x0144, "PropertyTagTileOffset"},
{0x0142, "PropertyTagTileWidth"},
{0x012D, "PropertyTagTransferFunction"},
{0x0156, "PropertyTagTransferRange"},
{0x013E, "PropertyTagWhitePoint"},
{0x011E, "PropertyTagXPosition"},
{0x011A, "PropertyTagXResolution"},
{0x0211, "PropertyTagYCbCrCoefficients"},
{0x0213, "PropertyTagYCbCrPositioning"},
{0x0212, "PropertyTagYCbCrSubsampling"},
{0x011F, "PropertyTagYPosition"},
{0x011B, "PropertyTagYResolution"},
};
public static string ReadPropertValueAsString(this PropertyItem propItem)
{
switch (propItem.Type)
{
case BYTES:
{
return propItem.Value.ToCommaSeparatedString();
}
case ASCII:
{
return System.Text.Encoding.ASCII.GetString(propItem.Value).TrimEnd('\0');
}
case SHORT:
{
var value = propItem.Value;
var ret = new ushort[propItem.Len / 2];
for (int i = 0; i < propItem.Len; i += 2)
{
ret[i / 2] = (ushort)(value[i + 1] << 8 | value[i]);
}
return ret.ToCommaSeparatedString();
}
case LONG:
case RATIONAL:
{
var value = propItem.Value;
var ret = new uint[propItem.Len / 4];
for (int i = 0; i < propItem.Len; i += 4)
{
ret[i / 4] = (uint)(value[i + 3] << 24 | value[i + 2] << 16 | value[i + 1] << 8 | value[i]);
}
return ret.ToCommaSeparatedString();
}
case SLONG:
case SRATIONAL:
{
var value = propItem.Value;
var ret = new int[propItem.Len / 4];
for (int i = 0; i < propItem.Len; i += 4)
{
ret[i / 4] = value[i + 3] << 24 | value[i + 2] << 16 | value[i + 1] << 8 | value[i];
}
return ret.ToCommaSeparatedString();
}
default:
return "";
}
}
private static string ToCommaSeparatedString<T>(this ICollection<T> collection)
{
return collection != null ? string.Join(",", collection.ToArray()) : null;
}
private static string Trim(this string text, int limit, string suffix="...")
{
if (text.Length > limit)
{
return text.Substring(0, limit) + suffix;
}
return text;
}
}
}
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