c – 使用QPixmap :: load()读取GeoTiff时的TIFFReadDirectory警告

2019年8月4日 441次阅读

我有一个geotiff文件,我用QPixmap :: load()加载到QPixmap中.我多次向控制台打印以下警告.但是,直接使用libtiff会在没有警告的情况下打开它.

关于如何在QT中缓解这些难看的警告的任何想法？

TIFFReadDirectory: Warning, foo: unknown field with tag 33550 (0x830e) encountered.
TIFFReadDirectory: Warning, foo: unknown field with tag 33922 (0x8482) encountered.
TIFFReadDirectory: Warning, foo: unknown field with tag 34735 (0x87af) encountered.
TIFFReadDirectory: Warning, foo: unknown field with tag 34736 (0x87b0) encountered.
TIFFReadDirectory: Warning, foo: unknown field with tag 34737 (0x87b1) encountered.
TIFFReadDirectory: Warning, foo: unknown field with tag 33550 (0x830e) encountered.
TIFFReadDirectory: Warning, foo: unknown field with tag 33922 (0x8482) encountered.
TIFFReadDirectory: Warning, foo: unknown field with tag 34735 (0x87af) encountered.
TIFFReadDirectory: Warning, foo: unknown field with tag 34736 (0x87b0) encountered.
TIFFReadDirectory: Warning, foo: unknown field with tag 34737 (0x87b1) encountered.

谢谢！

最佳答案 这些是可以使用libtiff库定义的自定义标记：

http://www.remotesensing.org/libtiff/addingtags.html

它们可能是EXIF标签：
http://www.awaresystems.be/imaging/tiff/tifftags/privateifd/exif.html

这些是libtiff的已知标签：
http://trac.imagemagick.org/browser/tiff/trunk/libtiff/tiff.h#L148

由于新定义包括类型和计数,您可能会猜测这些标记的含义.您还可以运行exiftool来检查未知的TIFF标记：
 $exiftool -htmldump sample.tif> /tmp/dump.html; firefox /tmp/dump.html

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