Converting tif files with -type truecolor corrupts output.
Posted: 2009-10-01T04:43:59-07:00
Hi.
I have been trying to find a solution to Seemingly random negative images. and I think I've found a bug in the process.
Using a TIF file from our fax server (GFI FaxMaker). I add a banner to the top and bottom and output the file as a TIF file.
My initial problem was random negative images.
The testing I used played around with using different combinations of -type.
If the last type for the tif file (which is always a black/white 2 colour 1 bit monochrome tif file) is -type truecolor, then the resultant image is corrupt.
No thumbnail is displayed in Windows Explorer. Windows Picture and Fax Viewer doesn't display the image. Paint Shop Pro shows a very strange image. ImageMagick's imdisplay has a good go at showing the image, but only about a third the image is shown. The rest is black. The odd thing is that it is the left third that is shown.
No other parameters are required to see the problem.
Using normal_aaa.tif from http://ee-stuff.com/Problem20090930084506.rar like will show the problem.
Regards,
Richard Quadling.
I have been trying to find a solution to Seemingly random negative images. and I think I've found a bug in the process.
Using a TIF file from our fax server (GFI FaxMaker). I add a banner to the top and bottom and output the file as a TIF file.
My initial problem was random negative images.
The testing I used played around with using different combinations of -type.
If the last type for the tif file (which is always a black/white 2 colour 1 bit monochrome tif file) is -type truecolor, then the resultant image is corrupt.
No thumbnail is displayed in Windows Explorer. Windows Picture and Fax Viewer doesn't display the image. Paint Shop Pro shows a very strange image. ImageMagick's imdisplay has a good go at showing the image, but only about a third the image is shown. The rest is black. The odd thing is that it is the left third that is shown.
No other parameters are required to see the problem.
Using normal_aaa.tif from http://ee-stuff.com/Problem20090930084506.rar like
Code: Select all
convert normal_aaa.tif -type truecolor normal_duff.tifRegards,
Richard Quadling.