LibTiff Mailing List
TIFF and LibTiff Mailing List Archive
April 2005
Previous Thread
Next Thread
Previous by Thread
Next by Thread
Previous by Date
Next by Date
Contact
The TIFF Mailing List Homepage
This list is run by Frank Warmerdam
Archive maintained by AWare Systems
Thread
2005.05.02 19:11 "Re: Color TIFF/JPEG compression questions", by Andrey Kiselev
Joris, On Mon, May 02, 2005 at 08:43:33PM +0200, Joris wrote: > We should check that we are talking about the exact same quad-jpeg.tif. quad-jpeg.tif does not contain the YCbCRSubsampling tag, but the one created with tiff2rgba does. > I know for a fact that AsTiffTagViewer shows exactly what is there, > and, unlike LibTiff, that stuff isn't burdoned with an actual image > decoder part and a subsampling-fixup scheme and such... That is the way how tiffdump works. > So if AsTiffTagViewer doesn't mention the tag, and tiffinfo does, I > know for a fact that tiffinfo must be wrong. tiffdump shows the TIFF structures how they will be visible for a top level application. Subsampling fixing logic works here, so we can see the tag which is not set in the original TIFF file. Regards, Andrey -- Andrey V. Kiselev Home phone: +7 812 5970603 ICQ# 26871517