Search found 42 matches

by mikmach
2018-12-30T03:29:04-07:00
Forum: Users
Topic: unrecognized color error
Replies: 5
Views: 2476

Re: unrecognized color error

Thank you all so much. Just removing " solved case and when testing on series of images it confirmed my impression. Getting info from histogram gives better results (for me) than use of simple color reduction.
by mikmach
2018-12-30T03:26:41-07:00
Forum: Users
Topic: Downsizing large JPEGS and maintaining quality
Replies: 6
Views: 2804

Re: Downsizing large JPEGS and maintaining quality

If you want to keep quality to 100 option `-sampling-factor 1x1` doesn't matter much but is always good thing to include it when dealing with JPGs. Simple `-unsharp` will do miracles when downsizing. Parameters you have to choose according to your taste. For me `1x1` is good enough although some may...
by mikmach
2018-12-29T15:01:53-07:00
Forum: Users
Topic: unrecognized color error
Replies: 5
Views: 2476

Re: unrecognized color error

I've found alternative:

Code: Select all

magick convert IMG_20181112_055511.jpg +dither -colors 10 -unique-colors -filter box -resize 3000% pdither.png
But I'd like to solve original problem - going through histogram gives some more options for color choosing.

TIA
by mikmach
2018-12-29T14:31:48-07:00
Forum: Users
Topic: unrecognized color error
Replies: 5
Views: 2476

unrecognized color error

Hello, ImageMagick: Version: ImageMagick 7.0.8-8 Q16 x64 2018-07-23 (for MS-Windows) Windows 8.1 cygwin - zsh 5.5.1 I'd like to create most color pallette for image and following some examples I've got to: magick convert -size 100x100 $(magick convert IMG_20181112_055511.jpg -format %c -colorspace H...
by mikmach
2017-02-02T12:33:24-07:00
Forum: Users
Topic: Auto WB correction
Replies: 20
Views: 13853

Re: Auto WB correction

I've found your scripts but instead study them dismissed them because they didn't have auto option :)
by mikmach
2017-01-29T09:34:32-07:00
Forum: Users
Topic: Auto WB correction
Replies: 20
Views: 13853

Re: Auto WB correction

First of all - thank you very much, mask is working. Second - sorry i was copying links to images and mislabeled one of them. Third - these are not my photos, just among first examples when you put 'bad white balance' in Google Images Fourth - 'my' method is variation on use of Photo filter adjustme...
by mikmach
2017-01-28T15:59:33-07:00
Forum: Users
Topic: Auto WB correction
Replies: 20
Views: 13853

Re: Auto WB correction

Here is another example, this time with cold image. Original: http://www.witkacy.hg.pl/badwb/cold.jpg Your method: http://www.witkacy.hg.pl/badwb/c1.png Your method: http://www.witkacy.hg.pl/badwb/cold_corr.png As you see your method with Blend compositing overshoots. In case of warm images it makes...
by mikmach
2017-01-28T15:53:58-07:00
Forum: Users
Topic: Auto WB correction
Replies: 20
Views: 13853

Re: Auto WB correction

Ups sorry. Between 5 and 6 - use PS Color layer blending mode Color (in IM jargon: compositing mode - Colorize) to blend two layers. In this particular case complete invert/negate is almost undistinguishable from invert of just Hue channel so posted only one example. But difference is there and in o...
by mikmach
2017-01-28T15:27:12-07:00
Forum: Users
Topic: Auto WB correction
Replies: 20
Views: 13853

Re: Auto WB correction

Thank you for your help but blend mode doesn't cut it (already tried). In this case it is working because example is in so bad state that any correction is improvement. But look here: Original image: http://www.witkacy.hg.pl/badwb/warm.jpg Your method: http://www.witkacy.hg.pl/badwb/w1.png My method...
by mikmach
2017-01-26T14:32:40-07:00
Forum: Users
Topic: Auto WB correction
Replies: 20
Views: 13853

Re: Auto WB correction

I cannot create in IM multi-layer TIFF files which would be readable by PS. Found post on forum by one of IM developers that they don't plan to introduce this feature (note that this post was few years old). Cannot find on the web exact copy of this but here is slightly different version: https://ww...
by mikmach
2017-01-26T08:10:26-07:00
Forum: Users
Topic: Auto WB correction
Replies: 20
Views: 13853

Re: Auto WB correction

Tested with (script with minor corrections due to changes in HSB values reporting): Version: ImageMagick 7.0.4-5 Q16 x64 2017-01-21 http://www.imagemagick.org Copyright: Copyright (C) 1999-2015 ImageMagick Studio LLC License: http://www.imagemagick.org/script/license.php Visual C++: 180040629 Featur...
by mikmach
2017-01-26T07:06:50-07:00
Forum: Users
Topic: Auto WB correction
Replies: 20
Views: 13853

Re: Auto WB correction

As usual forgot: Version: ImageMagick 6.9.3-5 Q8 x64 2016-02-20 http://www.imagemagick.org Copyright: Copyright (C) 1999-2015 ImageMagick Studio LLC License: http://www.imagemagick.org/script/license.php Visual C++: 180040629 Features: Cipher DPC Modules OpenMP Delegates (built-in): bzlib cairo free...
by mikmach
2017-01-26T03:04:46-07:00
Forum: Users
Topic: Auto WB correction
Replies: 20
Views: 13853

Auto WB correction

Hello, I tried to create auto color correction according to well known PS method: duplicate layer, blur to average, invert H value, set opacity to please, blend in color mode. I hit to obstacles in ImageMagick: 1) best solution would be create automatically two separate layers with appropriate setti...
by mikmach
2016-10-31T08:10:52-07:00
Forum: Bugs
Topic: profile conversion incomplete w/o metadata update
Replies: 0
Views: 7292

profile conversion incomplete w/o metadata update

Profile conversion is incomplete without updating of relevant metadata fields. Note: for proper review of problem you may need to download all files into your disk and use program like Windows Photography Viewer (built-in Windows app) which are understanding color management partially. Lets take int...
by mikmach
2016-10-31T06:43:52-07:00
Forum: Bugs
Topic: metadata lost in operation
Replies: 8
Views: 8150

Re: metadata lost in operation

Returning to this problem. Narrowed problem a bit. Below are Exif fields affected, they are not changed/updated but removed completely. Their counterparts in IIM (IPTC) and XMP are preserved: [EXIF] Artist [EXIF] Color Space [EXIF] Components Configuration [EXIF] Copyright [EXIF] Date/Time Original ...