更改 TIFF 图像压缩类型，同时保留所有标签

Question

是否有命令行工具可以更改 TIFF 图像中使用的压缩类型而不丢弃未知标签？当我执行以下操作时，Imagemagick 7.1.1-36 会丢弃 GeoTIFF 标签，尽管这个post暗示了其他情况。

% magick USGS_13_n35w119_20240207.tif -compress Zip USGS_13_n35w119_20240207zip.tif

这是一个示例图像。我正在尝试在 macOS 上执行此操作。

Answer 1

我从此处下载了带有 GeoTIFF 标签的文件。然后我用 LZW 压缩它 ImageMagick:

magick SP27GTIF.TIF -compress LZW new.tif

magick: Unknown field with tag 33550 (0x830e) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/945.
magick: Unknown field with tag 33922 (0x8482) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/945.
magick: Unknown field with tag 34735 (0x87af) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/945.
magick: Unknown field with tag 34737 (0x87b1) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/945.

然后我检查了文件

new.tif

，发现标签丢失了。我通过使用

exiftoool

:

从原始文件中向前复制来放回标签

exiftool -TagsFromFile SP27GTIF.TIF new.tif

并且，再次检查时，原始 GeoTIFF 标签（来自

SP27GTIF.TIF

）出现在 LZW 压缩图像中

new.tif

.

identify -verbose new.tif | grep -Ei "tag|LZW"

  Format: TIFF (Tagged Image File Format)
identify: Unknown field with tag 33550 (0x830e) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/945.
identify: Unknown field with tag 33922 (0x8482) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/945.
identify: Unknown field with tag 34735 (0x87af) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/945.
identify: Unknown field with tag 34737 (0x87b1) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/945.
  Compression: LZW