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我有一个包含多个图像的单个 tiff 文件。我想提取每个图像的图像描述值。我不知道为什么，但是当我使用 时ImageMetaDataReader，它只返回第一个和最后一个图像描述。我已经使用 exiftool 验证了数据是否存在并转储到 xml 树。任何建议为什么这不起作用？

Metadata metadata = ImageMetadataReader.readMetadata(createInputFile());
            for (Directory directory : metadata.getDirectories())
            {
                for (Tag tag : directory.getTags())
                {
                        fileWriter.write(String.format(tag + "%n"));
                }
            }

使用元数据提取器的所有标签

[Exif IFD0] New Subfile Type - Full-resolution image
[Exif IFD0] Image Width - 1254 pixels
[Exif IFD0] Image Height - 558 pixels
[Exif IFD0] Bits Per Sample - 1 bits/component/pixel
[Exif IFD0] Compression - T6/Group 4 Fax
[Exif IFD0] Photometric Interpretation - WhiteIsZero
[Exif IFD0] Fill Order - Normal
[Exif IFD0] Image Description - 12345                         
[Exif IFD0] Strip Offsets - 399
[Exif IFD0] Orientation - Top, left side (Horizontal / normal)
[Exif IFD0] Samples Per Pixel - 1 samples/pixel
[Exif IFD0] Rows Per Strip - 558 rows/strip
[Exif IFD0] Strip Byte Counts - 7899 bytes
[Exif IFD0] Minimum Sample Value - 0
[Exif IFD0] Maximum Sample Value - 1
[Exif IFD0] X Resolution - 200 dots per inch
[Exif IFD0] Y Resolution - 200 dots per inch
[Exif IFD0] Planar Configuration - Chunky (contiguous for each subsampling pixel)
[Exif IFD0] Unknown tag (0x0125) - 0
[Exif IFD0] Resolution Unit - Inch
[Exif Thumbnail] New Subfile Type - Full-resolution image
[Exif Thumbnail] Image Width - 1253 pixels
[Exif Thumbnail] Image Height - 558 pixels
[Exif Thumbnail] Bits Per Sample - 1 bits/component/pixel
[Exif Thumbnail] Compression - T6/Group 4 Fax
[Exif Thumbnail] Photometric Interpretation - WhiteIsZero
[Exif Thumbnail] Fill Order - Normal
[Exif Thumbnail] Image Description - 12345                         
[Exif Thumbnail] Strip Offsets - 38596
[Exif Thumbnail] Orientation - Top, left side (Horizontal / normal)
[Exif Thumbnail] Samples Per Pixel - 1 samples/pixel
[Exif Thumbnail] Rows Per Strip - 558 rows/strip
[Exif Thumbnail] Strip Byte Counts - 1288 bytes
[Exif Thumbnail] Minimum Sample Value - 0
[Exif Thumbnail] Maximum Sample Value - 1
[Exif Thumbnail] X Resolution - 200 dots per inch
[Exif Thumbnail] Y Resolution - 200 dots per inch
[Exif Thumbnail] Planar Configuration - Chunky (contiguous for each subsampling pixel)
[Exif Thumbnail] Unknown tag (0x0125) - 0
[Exif Thumbnail] Resolution Unit - Inch
[File Type] Detected File Type Name - ARW
[File Type] Detected File Type Long Name - Sony Camera Raw
[File Type] Expected File Name Extension - arw
[File] File Name - test_images.tif
[File] File Size - 39884 bytes
[File] File Modified Date - Wed Apr 10 08:51:24 -02:30 2019


All tags using Exiftool.

ExifTool Version Number         : 11.44
File Name                       : test_images.tif
Directory                       : .
File Size                       : 39 kB
File Modification Date/Time     : 2019:04:10 08:51:24-02:30
File Access Date/Time           : 2019:06:17 16:04:44-02:30
File Inode Change Date/Time     : 2019:06:17 15:16:47-02:30
File Permissions                : rwxr-xr-x
File Type                       : TIFF
File Type Extension             : tif
MIME Type                       : image/tiff
Exif Byte Order                 : Little-endian (Intel, II)
Subfile Type                    : Full-resolution Image
Image Width                     : 1254
Image Height                    : 558
Bits Per Sample                 : 1
Compression                     : T6/Group 4 Fax
Photometric Interpretation      : WhiteIsZero
Fill Order                      : Normal
Image Description               : 12345
Strip Offsets                   : 399
Orientation                     : Horizontal (normal)
Samples Per Pixel               : 1
Rows Per Strip                  : 558
Strip Byte Counts               : 7899
Min Sample Value                : 0
Max Sample Value                : 1
X Resolution                    : 200
Y Resolution                    : 200
Planar Configuration            : Chunky
T6 Options                      : (none)
Resolution Unit                 : inches
Subfile Type                    : Full-resolution Image
Image Width                     : 1253
Image Height                    : 558
Bits Per Sample                 : 1
Compression                     : T6/Group 4 Fax
Photometric Interpretation      : WhiteIsZero
Fill Order                      : Normal
Image Description               : 12345
Strip Offsets                   : 8689
Orientation                     : Horizontal (normal)
Samples Per Pixel               : 1
Rows Per Strip                  : 558
Strip Byte Counts               : 1288
Min Sample Value                : 0
Max Sample Value                : 1
X Resolution                    : 200
Y Resolution                    : 200
Planar Configuration            : Chunky
T6 Options                      : (none)
Resolution Unit                 : inches
Subfile Type                    : Full-resolution Image
Image Width                     : 1254
Image Height                    : 558
Bits Per Sample                 : 1
Compression                     : T6/Group 4 Fax
Photometric Interpretation      : WhiteIsZero
Fill Order                      : Normal
Image Description               : 12345
Strip Offsets                   : 10368
Orientation                     : Horizontal (normal)
Samples Per Pixel               : 1
Rows Per Strip                  : 558
Strip Byte Counts               : 7899
Min Sample Value                : 0
Max Sample Value                : 1
X Resolution                    : 200
Y Resolution                    : 200
Planar Configuration            : Chunky
T6 Options                      : (none)
Resolution Unit                 : inches
Subfile Type                    : Full-resolution Image
Image Width                     : 1253
Image Height                    : 558
Bits Per Sample                 : 1
Compression                     : T6/Group 4 Fax
Photometric Interpretation      : WhiteIsZero
Fill Order                      : Normal
Image Description               : 12345
Strip Offsets                   : 18658
Orientation                     : Horizontal (normal)
Samples Per Pixel               : 1
Rows Per Strip                  : 558
Strip Byte Counts               : 1288
Min Sample Value                : 0
Max Sample Value                : 1
X Resolution                    : 200
Y Resolution                    : 200
Planar Configuration            : Chunky
T6 Options                      : (none)
Resolution Unit                 : inches
Subfile Type                    : Full-resolution Image
Image Width                     : 1254
Image Height                    : 558
Bits Per Sample                 : 1
Compression                     : T6/Group 4 Fax
Photometric Interpretation      : WhiteIsZero
Fill Order                      : Normal
Image Description               : 12345
Strip Offsets                   : 20337
Orientation                     : Horizontal (normal)
Samples Per Pixel               : 1
Rows Per Strip                  : 558
Strip Byte Counts               : 7899
Min Sample Value                : 0
Max Sample Value                : 1
X Resolution                    : 200
Y Resolution                    : 200
Planar Configuration            : Chunky
T6 Options                      : (none)
Resolution Unit                 : inches
Subfile Type                    : Full-resolution Image
Image Width                     : 1253
Image Height                    : 558
Bits Per Sample                 : 1
Compression                     : T6/Group 4 Fax
Photometric Interpretation      : WhiteIsZero
Fill Order                      : Normal
Image Description               : 12345
Strip Offsets                   : 28627
Orientation                     : Horizontal (normal)
Samples Per Pixel               : 1
Rows Per Strip                  : 558
Strip Byte Counts               : 1288
Min Sample Value                : 0
Max Sample Value                : 1
X Resolution                    : 200
Y Resolution                    : 200
Planar Configuration            : Chunky
T6 Options                      : (none)
Resolution Unit                 : inches
Subfile Type                    : Full-resolution Image
Image Width                     : 1254
Image Height                    : 558
Bits Per Sample                 : 1
Compression                     : T6/Group 4 Fax
Photometric Interpretation      : WhiteIsZero
Fill Order                      : Normal
Image Description               : 12345
Strip Offsets                   : 30306
Orientation                     : Horizontal (normal)
Samples Per Pixel               : 1
Rows Per Strip                  : 558
Strip Byte Counts               : 7899
Min Sample Value                : 0
Max Sample Value                : 1
X Resolution                    : 200
Y Resolution                    : 200
Planar Configuration            : Chunky
T6 Options                      : (none)
Resolution Unit                 : inches
Subfile Type                    : Full-resolution Image
Image Width                     : 1253
Image Height                    : 558
Bits Per Sample                 : 1
Compression                     : T6/Group 4 Fax
Photometric Interpretation      : WhiteIsZero
Fill Order                      : Normal
Image Description               : 12345
Strip Offsets                   : 38596
Orientation                     : Horizontal (normal)
Samples Per Pixel               : 1
Rows Per Strip                  : 558
Strip Byte Counts               : 1288
Min Sample Value                : 0
Max Sample Value                : 1
X Resolution                    : 200
Y Resolution                    : 200
Planar Configuration            : Chunky
T6 Options                      : (none)
Resolution Unit                 : inches
Image Size                      : 1254x558
Megapixels                      : 0.700
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1 回答 1

0

如果要从 Android 项目中的图像中检索元数据。然后你可以在 https://github.com/drewnoakes/metadata-extractor的帮助下 使用 implementation 'com.drewnoakes:metadata-extractor:2.12.0' 在 Gradle 中实现它

完整代码如下

private static String getImageMetaData(Uri image1) {

    try {
        InputStream inputStream = FILE_CONTEXT.getContentResolver().openInputStream(image1);
        try {
            image1.getEncodedUserInfo();
            Metadata metadata = ImageMetadataReader.readMetadata(inputStream);
            for (Directory directory1 : metadata.getDirectories()) {
                if (directory1.getName().equals("Exif IFD0")) {
                    for (Tag tag : directory1.getTags()) {
                        if (tag.getTagName().equals("Date/Time")) {
                            return tag.getDescription();
                        }
                    }
                }
            }
        } catch (ImageProcessingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
    return null;
}
于 2019-10-22T16:31:12.877 回答