Search found 268 matches

by whugemann
2018-12-03T03:34:08-07:00
Forum: Digital Image Processing
Topic: Native CLAHE support
Replies: 15
Views: 2515

Re: Native CLAHE support

OK, I have just verified that it is fixed in the current version 7.0.8-15. But I still cannot see any inluence of the clip-limit parameter. In Fiji/ImageJ its influence is quite drastic, the default value beeing 3.0. In ImageMagick, I cannot see any difference, regardless what value I supply for it....
by whugemann
2018-12-03T02:18:13-07:00
Forum: Users
Topic: Porting Windows batch files to IM version 7
Replies: 2
Views: 256

Re: Porting Windows batch files to IM version 7

My own solution is to install both versions: v7 without legacy, and v6. Then "convert" runs v6, and "magick" (not "magick convert") runs v7.
Well, that sounds like a plan to me. I will take this road too (and report where it has led me ...)
by whugemann
2018-12-01T06:17:23-07:00
Forum: Users
Topic: Porting Windows batch files to IM version 7
Replies: 2
Views: 256

Porting Windows batch files to IM version 7

Is there anywhere a hands-on approach to what I have to do exactly when migrating my batch files to IM version 7? Do I just have to click the checkboxes for legacy support during installation and may I then expect my batch files to run mostly? I read http://www.imagemagick.org/script/porting.php, bu...
by whugemann
2018-11-29T07:36:37-07:00
Forum: Digital Image Processing
Topic: Native CLAHE support
Replies: 15
Views: 2515

Re: Native CLAHE support

OK, got it. It would help if one would know about the default values and the range for the maximum contrast parameter. Usage: magick in.jpg -clahe 4x3+127+3 out.jpg or, basically: magick in.jpg -clahe 4x out.jpg I think there is a bug in the filter, as it produces diagobal stripes if the tiles are n...
by whugemann
2018-11-29T05:31:52-07:00
Forum: Digital Image Processing
Topic: Native CLAHE support
Replies: 15
Views: 2515

Re: Native CLAHE support

OK, I downloaded ImageMagick-7.0.8-14-Q16-x86-dll.exe and verified that is has a -clahe option. But how do I find out about the parameters it expects? I would expect three parameters: block size, histogram bins, maximum slope and, optional, 'fast or detailed mode', i.e. something along the line of m...
by whugemann
2018-11-29T01:32:00-07:00
Forum: Digital Image Processing
Topic: Native CLAHE support
Replies: 15
Views: 2515

Re: Native CLAHE support

This seems to have been fixed: https://github.com/ImageMagick/ImageMagick/issues/1393 But how do I get in reach of the "latest beta"? I tried https://www.imagemagick.org/download/beta and downloaded https://www.imagemagick.org/download/beta/ImageMagick-6.9.10-15~beta20181127-Q16-HDRI-x86-dll.exe, bu...
by whugemann
2018-11-19T13:15:05-07:00
Forum: Developers
Topic: Native CLAHE support
Replies: 1
Views: 637

Native CLAHE support

I would like ImageMagick to have native support for CLAHE, as discussed in viewtopic.php?f=22&t=35058. As is said there, the C code seems to be readily available. My present workaround is using ImageJ in batch mode.
by whugemann
2018-11-19T13:10:52-07:00
Forum: Digital Image Processing
Topic: Native CLAHE support
Replies: 15
Views: 2515

Re: Native CLAHE support

As I said, Karel Zuiderveld published the original C code, which is rather concise. Today I found out that ImageJ has a headless mode in which you can run it from the command line just like ImageMagick and use all its features and even macros and plugins. This sounds like a solution to my problem, a...
by whugemann
2018-11-19T07:43:01-07:00
Forum: Digital Image Processing
Topic: Native CLAHE support
Replies: 15
Views: 2515

Native CLAHE support

I have been using Fiji's/ImageJ's built-in CLAHE filter a lot in recent years, and I have always wondered whether ImageMagick could provide a native CLAHE filter. The problem with Fiji is, that you have to apply the filter to each image individually (or write a yourself a script that does so for ima...
by whugemann
2018-09-10T06:38:44-07:00
Forum: Users
Topic: JPEG-turbo and arithmetic coding
Replies: 1
Views: 1200

JPEG-turbo and arithmetic coding

I have just installed my first 7.x version of IM (i.e. with magick.exe) as a precompiled windows binary. How do i found out whether it uses jpeg-turbo and if so, how can I use arithmetic coding? magick -list format yields JPEG* JPEG rw- Joint Photographic Experts Group JFIF format (62) I think that ...
by whugemann
2018-06-22T00:21:28-07:00
Forum: Users
Topic: Hint: Sorting filenames for Montage under Windows
Replies: 0
Views: 3469

Hint: Sorting filenames for Montage under Windows

Problem: A lot of PDF printers cut photos into horizontal stripes or even tiles. You can extract these sniplets with the help of the xpdf tools and re-combine them with Montage, preferably sending their filenames to a batch file via SendTo. However, the filenames are not sorted by name when sent. S...
by whugemann
2015-06-06T15:25:26-07:00
Forum: Users
Topic: pdf portrait-format via right-click convert to lanscape-format in same folder by adding a filename extension _landscape
Replies: 1
Views: 2382

Re: pdf portrait-format via right-click convert to lanscape-format in same folder by adding a filename extension _landsc

As I understand, you are working under Windows, so your question is more about Windows than about ImageMagick. The easiest way to establish this functionality would be to place the batch file in the SendTo folder, see http://www.imagemagick.org/Usage/windows/#scripts . You then have to refer to the ...
by whugemann
2015-03-13T06:27:45-07:00
Forum: Users
Topic: Ack! IM Tiffs turn bright green when dropped into Word
Replies: 37
Views: 17272

Re: Ack! IM Tiffs turn bright green when dropped into Word

This problem has been annoying me for years now. (I think, I also mentioned it on this board.) Today I found out that the instertion of a simple "-colorspace gray" does the trick, i.e. something along the lines of (Windows batch file): convert -density 300 %1 -trim -colorspace gray -compress group4 ...
by whugemann
2015-03-10T03:19:07-07:00
Forum: Developers
Topic: CMS for the Usage section of the IM website
Replies: 10
Views: 7795

Re: CMS for the Usage section of the IM website

Hi all, today I took the time and drew two mindmaps http://www.unfallrekonstruktion.de/imagemagick/Current.html http://www.unfallrekonstruktion.de/imagemagick/Future.html what the logical structure of a to-be CMS could look like. The single pages must definitively become shorter to keep them maintai...
by whugemann
2015-02-10T09:04:50-07:00
Forum: Users
Topic: Resolution set to 170 dpi, but Windows Explorer insits on 72 dpi
Replies: 2
Views: 3067

Re: Resolution set to 170 dpi, but Windows Explorer insits on 72 dpi

The problem seems to be solved in current versions of IM. I have just installed the current version, and now even the JPEGs exported by Photoshop are recognised with the correct resolution -- both by the Windows Explorer and Microsoft Word. Up to now I still ran IM 6.8.0-1, dating from 2012: This wa...