Legacy ImageMagick Discussions Archive

I've searched through the forum but haven't seen someone having the same problem and that the proposed solution solves my problem. I've also posted to the mail list but I haven't had much luck either. If I've missed something, please point it out!

I'm trying to redact (cover sensitive information with a big black box) a TIF image and save into a new TIF image. One of the proposed solutions was to specify a compression scheme. (i.e. -compression lzw) This doesn't work for me.

Here's the command I'm trying to use:

Code: Select all

convert white.tif -fill black -draw "rectangle 15,15 210,45" -compress lzw white2.tif

If I change the type of white2.tif to white2.jpg, it works. I ran the command with -verbose, but nothing seemed out of place.

More info:

Code: Select all

convert -version
Version: ImageMagick 6.2.8 06/30/06 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2006 ImageMagick Studio LLC

This is all on Windows XP. Also, here's the image I was working with: http://www.eng.utoledo.edu/~aneiman/white.tif

Your command worked for us. We're using the very latest 6.2.8 Windows binaries dated just a few days ago.

I redownloaded & reinstalled the latest Windows binary off of the site and it didn't fix anything with my original command.

Thanks, mckuehl. I tried running your command, but this produced some interesting results. First off, the TIF isn't editable using Paint, nor am I able to preview using the Windows Picture & Fax Viewer. I am able to open it using the IMDisplay program. I can view the TIF in a browser, but that's through the Quicktime plugin. (I've tried unchecking the option to display TIFs through the plugin but that didn't make it display without the plugin. That's a different matter altogether, so don't worry about it.) Any ideas?

Here's the output if I run mckuehl's command. http://www.eng.utoledo.edu/~aneiman/white-8bitdepth.tif

Many TIFF applications only handle a restricted set of TIFF image types. Try adding

+matte -depth 8 -compress none

to your command line to create a TIFF image type that most applications can deal with.

Thank you both a thousand times over. I was able to get a valid TIF with the extra options you gave me magick. I narrowed it down to the +matte, which seems to fix it all.

Legacy ImageMagick Discussions Archive

Problems Outputting to TIF

Problems Outputting to TIF