如何在TiffOutputSet中嵌入ICC_Profile [英] How to embed ICC_Profile in TiffOutputSet
问题描述
我正在尝试使用Commons-Imaging（曾经是Sanselan）来编写一个tiff文件。我正在尝试向标头添加ICC_Profile。这是我的代码：
I am trying to use Commons-Imaging (used to be Sanselan) to write a tiff file. I am trying to add an ICC_Profile to the header. Here is the code I have:
TiffImageMetadata tmeta = (TiffImageMetadata) metadata;
TiffOutputSet outputSet = tmeta.getOutputSet();
TagInfoUndefined TIFF_TAG_ICC = TiffOutputField.EXIF_TAG_CURRENT_ICCPROFILE;
byte[] profileBytes = ICC_Profile.getInstance(pathToFile).getData();
TiffOutputField field = new TiffOutputField(TIFF_TAG_ICC, FieldType.UNDEFINED, 1, profileBytes);
TiffOutputDirectory exifDirectory = outputSet.getOrCreateExifDirectory();
exifDirectory.removeField(TiffOutputField.EXIF_TAG_CURRENT_ICCPROFILE);
exifDirectory.add(field);
TiffImageWriterLossless writerLossless = new TiffImageWriterLossless(bytes);
writerLossless.write(new FileOutputStream(resultingFilePath), outputSet);
我相信使用TiffImageWriterLossless是正确的方法，但我添加的标签不是''认识到了。
I believe that using TiffImageWriterLossless is the correct way to do this, but the tag that I add isn't recognized.
那里有人知道我在哪里出错吗？
Does somebody out there know where I am going wrong here?
我的下次尝试：
TiffImageMetadata tmeta = (TiffImageMetadata) metadata;
TiffOutputSet outputSet = tmeta.getOutputSet();
byte iccBytes[] = ICC_Profile.getInstance(pathToIccFile);
TagInfoUndefined ICC_INFO = TiffConstants.EXIF_TAG_INTER_COLOR_PROFILE;
TiffOutputField field = new TiffOutputField(ICC_INFO, FieldType.UNDEFINED, iccBytes.length, iccBytes);
TiffOutputDirectory exifDirectory = outputSet.getOrCreateExifDirectory();
exifDirectory.add(field);
TiffImageWriterLossless writerLossless = new TiffImageWriterLossless(imageBytes);
writerLossless.write(new FileOutputStream(resultingFilePath), outputSet);
Image Magick识别：
Image Magick identify:
identify: Unknown field with tag 34675 (0x8773) encountered. `TIFFReadCustomDirectory' @ warning/tiff.c/TIFFWarnings/824.
如果有人能指出我正确的方向，我会很高兴做腿部工作。当我查看Commons-Imaging文档时，它被声明：
I'd be happy to do the legwork if somebody can point me in the right direction. When I looked at the Commons-Imaging docs it is stated:
大多数其他库对ICC配置文件提供的支持很少或不完整。 Commons Imaging可以提取并（简单地）解析嵌入的ICC配置文件。此外，它默认应用ICC配置文件，将读取的图像转换为sRGB。这意味着默认情况下图像会进行颜色校正。请参阅： http://en.wikipedia.org/wiki/International_Color_Consortium ， http://en.wikipedia.org/wiki/sRGB
这似乎只是指读ICC_Profiles？
This seems to be referring only to reading ICC_Profiles?
ExifTool似乎拿起了Adobe RGB Profile：
ExifTool seems to pick up the Adobe RGB Profile:
ExifTool Version Number : 9.45
File Name : straw.tif
Directory : .
File Size : 130 kB
File Modification Date/Time : 2014:01:04 09:56:03-06:00
File Access Date/Time : 2014:01:04 10:02:03-06:00
File Inode Change Date/Time : 2014:01:04 09:56:18-06:00
File Permissions : rw-------
File Type : TIFF
MIME Type : image/tiff
Exif Byte Order : Little-endian (Intel, II)
Image Width : 502
Image Height : 564
Bits Per Sample : 8 8 8
Compression : LZW
Photometric Interpretation : RGB
Strip Offsets : (Binary data 765 bytes, use -b option to extract)
Samples Per Pixel : 3
Rows Per Strip : 5
Strip Byte Counts : (Binary data 477 bytes, use -b option to extract)
X Resolution : 300
Y Resolution : 300
Resolution Unit : inches
Profile CMM Type : ADBE
Profile Version : 2.1.0
Profile Class : Display Device Profile
Color Space Data : RGB
Profile Connection Space : XYZ
Profile Date Time : 2000:08:11 19:51:59
Profile File Signature : acsp
Primary Platform : Apple Computer Inc.
CMM Flags : Not Embedded, Independent
Device Manufacturer : none
Device Model :
Device Attributes : Reflective, Glossy, Positive, Color
Rendering Intent : Perceptual
Connection Space Illuminant : 0.9642 1 0.82491
Profile Creator : ADBE
Profile ID : 0
Profile Copyright : Copyright 2000 Adobe Systems Incorporated
Profile Description : Adobe RGB (1998)
Media White Point : 0.95045 1 1.08905
Media Black Point : 0 0 0
Red Tone Reproduction Curve : (Binary data 14 bytes, use -b option to extract)
Green Tone Reproduction Curve : (Binary data 14 bytes, use -b option to extract)
Blue Tone Reproduction Curve : (Binary data 14 bytes, use -b option to extract)
Red Matrix Column : 0.60974 0.31111 0.01947
Green Matrix Column : 0.20528 0.62567 0.06087
Blue Matrix Column : 0.14919 0.06322 0.74457
Image Size : 502x564
但如果我用GIMP打开相同的TIFF文件 - 它只能找到默认的sRGB ColorSpace。
But if I open the same TIFF file with GIMP - it only finds the default sRGB ColorSpace.
令人沮丧。 ExifTool找到配置文件并显然读取它，但GIMP找不到它。如果它不能被流行的图像编辑器拾取它是没用的。
Frustrating. ExifTool finds the profile and apparently reads it, but GIMP doesn't find it. It's useless if it can't be picked up by popular Image Editors.
推荐答案
我得到了它的工作。我犯的错误是当我收到TiffOutputDirectory时，我调用了getOrCreateExifDirectory，但它应该是getOrCreateRootDirectory。
I got it to work. The mistake I made was when I got the TiffOutputDirectory, I called getOrCreateExifDirectory, but it should have been getOrCreateRootDirectory.
这是正确的代码：
TiffImageMetadata tmeta = (TiffImageMetadata) metadata;
TiffOutputSet outputSet = tmeta.getOutputSet();
byte iccBytes[] = Util.getAdobe98ProfileBytes();
TagInfoUndefined ICC_INFO = TiffConstants.EXIF_TAG_INTER_COLOR_PROFILE;
TiffOutputField field = new TiffOutputField(ICC_INFO, FieldType.UNDEFINED, iccBytes.length, iccBytes);
TiffOutputDirectory rootDirectory = outputSet.getOrCreateRootDirectory();
rootDirectory.removeField(ICC_INFO);
rootDirectory.add(field);
TiffImageWriterLossless writerLossless = new TiffImageWriterLossless(imageBytes);
writerLossless.write(new FileOutputStream(resultingFilePath), outputSet);
这是在TiffOutputSet中嵌入ICC_Profile的方法。
This is how you embed an ICC_Profile in TiffOutputSet.
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