[Gimp-user] Image bit depth

2008-01-16 Thread 7willows
Hi, As an in frequent GIMP user since v1.2, GIMP was used just cropping and resizing images. One of the computer magazines I picked up in a locale store had published an article on GIMP showing how to selectively colourise based on Eric R. Jeschke tutorial, which I tried. In another magazine

[Gimp-user] convert tiff image to bitonal

2008-01-16 Thread Alexandru Cabuz
Hello, I have some tiff files which I want to convert to djvu using the bitonal encoder of djvulibre. However, my tiff files are nominally color, even though they just contain BW text. How can I transform these files to be bitonal? Also, is there a way to batch this job? -- Alexandru I. Cabuz

Re: [Gimp-user] Image bit depth

2008-01-16 Thread Thomas Worthington
It's worth remembering that printing is almost universally still 8bit. However, it is clearly very important that any current image package should allow opening and manipulation of greater depth images. My own camera is a long obsolete Fuji S20 but it produces 12bit images. As a result all

Re: [Gimp-user] Image bit depth

2008-01-16 Thread Joao S. O. Bueno
On Wednesday 16 January 2008 07:58, Thomas Worthington wrote: On Wed, 16 Jan 2008 10:25:39 -, 7willows [EMAIL PROTECTED] wrote: As CPUs are now primarily 64bit (I am running Solaris 10 x86 as a 64bit OS) could the design of GIMP be adjusted so that maximum image bit depth becomes user

[Gimp-user] Interactive BW Conversion?

2008-01-16 Thread Paul Waldo
Hi all, I am looking for a plugin that will help me convert a color image to Black and White. I have looked at the Plugin Registry and found a couple that do this, but they are not interactive. I would like to see for example, the difference between a yellow filter and a red filter are, and

Re: [Gimp-user] Image bit depth

2008-01-16 Thread Thomas Worthington
On Wed, 16 Jan 2008 13:49:59 -, Joao S. O. Bueno [EMAIL PROTECTED] wrote: But, answering you both: yes, current gimp trunk is using GEGL for some color operations, which are them performed at 32bit floating point precision. Version 2.6, which will come out this year will implement

Re: [Gimp-user] Interactive BW Conversion?

2008-01-16 Thread Elwin Estle
Would this do what you want? http://www.gimpguru.org/Tutorials/Color2BW/ --- Paul Waldo [EMAIL PROTECTED] wrote: Hi all, I am looking for a plugin that will help me convert a color image to Black and White. I have looked at the Plugin Registry and found a couple that do this, but they

Re: [Gimp-user] Image bit depth

2008-01-16 Thread Joao S. O. Bueno
On Wednesday 16 January 2008 12:01, Thomas Worthington wrote: On Wed, 16 Jan 2008 13:49:59 -, Joao S. O. Bueno [EMAIL PROTECTED] wrote: But, answering you both: yes, current gimp trunk is using GEGL for some color operations, which are them performed at 32bit floating point

Re: [Gimp-user] Interactive BW Conversion?

2008-01-16 Thread Paul Waldo
Thanks for the reply, Elwin. Digikam does a great job of allowing you to pick * Film Type (Agfa Pan 100, Kodak Tri-X, etc.) * Lens Filters (Red, Orange, Blue, etc.) * Tone (Sepia, Selenium, Platinum) It does this by showing a thumbnail of what your image would look like with the parameter

Re: [Gimp-user] convert tiff image to bitonal

2008-01-16 Thread Owen
On Wed, 16 Jan 2008 12:38:29 +0200 Alexandru Cabuz [EMAIL PROTECTED] wrote: Hello, I have some tiff files which I want to convert to djvu using the bitonal encoder of djvulibre. However, my tiff files are nominally color, even though they just contain BW text. How can I transform these

Re: [Gimp-user] convert tiff image to bitonal

2008-01-16 Thread Alexandru Cabuz
Imagemagick does the job. Command I used was this: convert -colors 2 -density 600x600 -colorspace gray -compress group4 pg_0015.pdf pg_0015.tif The tif files generated are bitonal and the djvulibre bitonal algorithm cjb2 works fine on them. Was not able to batch, so I used openoffice

Re: [Gimp-user] convert tiff image to bitonal

2008-01-16 Thread Owen
Imagemagick does the job. Command I used was this: convert -colors 2 -density 600x600 -colorspace gray -compress group4 pg_0015.pdf pg_0015.tif The tif files generated are bitonal and the djvulibre bitonal algorithm cjb2 works fine on them. Was not able to batch, so I used openoffice

Re: [Gimp-user] convert tiff image to bitonal

2008-01-16 Thread Andrew
Owen wrote: Imagemagick does the job. Command I used was this: convert -colors 2 -density 600x600 -colorspace gray -compress group4 pg_0015.pdf pg_0015.tif The tif files generated are bitonal and the djvulibre bitonal algorithm cjb2 works fine on them. Was not able to batch, so I used