java - 如何在 TiffOutputSet 中嵌入 ICC_Profile

Question

我正在尝试使用 Commons-Imaging(以前是 Sanselan)来编写 tiff 文件。我正在尝试将 ICC_Profile 添加到 header 。这是我的代码:

    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 是执行此操作的正确方法，但我添加的标签无法识别。

有人知道我哪里出了问题吗？

我的下一次尝试:

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:

identify: Unknown field with tag 34675 (0x8773) encountered. `TIFFReadCustomDirectory' @ warning/tiff.c/TIFFWarnings/824.

如果有人能给我指明正确的方向，我很乐意做这些工作。当我查看 Commons-Imaging 文档时，它指出:

Most other libraries offer little or incomplete support for ICC Profiles. Commons Imaging can extract and (simply) parse embedded ICC Profiles. Moreover, it applies the ICC profile by default, coverting read images to sRGB. This means images are color-corrected by default. see: http://en.wikipedia.org/wiki/International_Color_Consortium, http://en.wikipedia.org/wiki/sRGB

这似乎仅指读取 ICC_Profiles？

ExifTool 似乎支持 Adob​​e RGB 配置文件:

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

但是如果我使用 GIMP 打开相同的 TIFF 文件 - 它只会找到默认的 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。如果流行的图像编辑器无法使用它，它就毫无用处。

Answer 1

我让它工作了。我犯的错误是当我获取TiffOutputDirectory时，我调用了getOrCreateExifDirectory，但它应该是getOrCreateRootDirectory。

正确的代码如下:

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);

这就是在 TiffOutputSet 中嵌入 ICC_Profile 的方法。