Search found 294 matches

by whugemann
2018-11-29T05:31:52-07:00
Forum: Digital Image Processing
Topic: Native CLAHE support
Replies: 16
Views: 19818

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: 16
Views: 19818

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: 4181

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: 16
Views: 19818

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: 16
Views: 19818

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: 2380

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: 5550

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: 2988

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: 22363

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: 9560

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: 4040

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...
by whugemann
2015-02-04T08:39:30-07:00
Forum: Users
Topic: Resolution set to 170 dpi, but Windows Explorer insits on 72 dpi
Replies: 2
Views: 4040

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

I often rescale photos in order to embed them in a Microsoft Word document and print them. My batch code is basically convert %1 -resize 1024x1024">" -quality 80%% -units PixelsPerInch -density 170 "%~dpn1_small.jpg" This works fine with most JPEGs, i.e. photos and JPEGs exported by Gimp, but fails ...
by whugemann
2015-01-01T12:07:52-07:00
Forum: Bugs
Topic: Montage's file name globbing under Windows
Replies: 6
Views: 10751

Re: Montage's file name globbing under Windows

I have just had another check on this subject after quite a while –- and found the issue solved in the current IM version. The batch script now works again like it did before the problem occured. No more problems with German umlauts in Montage's filename globbing.
by whugemann
2014-11-12T10:03:10-07:00
Forum: Users
Topic: Specify maximum JPEG quality
Replies: 2
Views: 4486

Specify maximum JPEG quality

I see no way to specify the maximum (or minimal) JPEG quality. I often do bulk conversions of JPEG photographs, reducing their size in order to embed them in a Word document. The JPEG quality of normal photographs is something like 95%, so if I specify '-quality 90%', the bulk-converted photographs ...
by whugemann
2014-10-22T13:17:58-07:00
Forum: Developers
Topic: CMS for the Usage section of the IM website
Replies: 10
Views: 9560

Re: CMS for the Usage section of the IM website

OK, I'll try to produce a small demo, i.e. transfer a small amount of the Usage section into WordPress or alike and see where this will lead me. And in a few weeks we may have something to discuss about. You are probably right: Theoretical discussions are of limited use, one has to try to make thing...