TIFFReadDirectory當使用QPixmap :: load（）讀取GeoTiff時發出警告

Question

我有一個geotiff文件，我正在用QPixmap :: load（）加載到QPixmap中。我多次向控制檯顯示以下警告。然而，直接使用libtiff會在沒有警告的情況下打開它。

有關如何減輕QT中這些難看警告的想法？

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. 

謝謝！

Answer 1

這些都是可以用的libtiff庫中定義的自定義標籤：
http://www.remotesensing.org/libtiff/addingtags.html

他們可能EXIF標籤：
http://www.awaresystems.be/imaging/tiff/tifftags/privateifd/exif.html

這些都是已知的標籤的libtiff：
http://trac.imagemagick.org/browser/tiff/trunk/libtiff/tiff.h#L148

由於新的定義包括類型和數量，您可能會猜到，這些標籤的含義。您也可以運行exiftool來檢查未知的TIFF標籤：
$ exiftool -htmldump sample.tif> /tmp/dump.html; firefox /tmp/dump.html