Search found 15 matches

by ssilk
2011-07-26T07:03:54-07:00
Forum: Digital Image Processing
Topic: Does Image Magick have Tonemapping operators?
Replies: 64
Views: 175704

Re: Does Image Magick have Tonemapping operators?

I'm working with Image Magick under Windows, and I've never been successful using PFStools in Windows. I've tried Cygwin approaches, as well as recompiling the library but there are way too many dependencies for the latter, and the former just didn't work for me. So, your suggestion would only work ...
by ssilk
2011-05-19T17:31:42-07:00
Forum: Digital Image Processing
Topic: Does Image Magick have Tonemapping operators?
Replies: 64
Views: 175704

Re: Does Image Magick have Tonemapping operators?

OK, Sorry, I didn't notice that Q16 part. I was just looking at features. C:\ImageMagick-6.6.7\VisualMagick\bin>convert -version Version: ImageMagick 6.6.7-1 2011-01-07 Q16 http://www.imagemagick.org Copyright: Copyright (C) 1999-2011 ImageMagick Studio LLC Features: HDRI "convert IMG_3133And8more_6...
by ssilk
2011-05-19T16:05:34-07:00
Forum: Digital Image Processing
Topic: Does Image Magick have Tonemapping operators?
Replies: 64
Views: 175704

Re: Does Image Magick have Tonemapping operators?

When I run "convert -version", I just get "HDRI", there's no specific bit-depth. When I try "convert IMG_3133And8more_640x480.hdr -verbose" I just get an error; can you clarify what other arguments that command needs. I also tried the following code: #include<Magick++.h> #include <iostream> using na...
by ssilk
2011-05-18T19:56:08-07:00
Forum: Digital Image Processing
Topic: Does Image Magick have Tonemapping operators?
Replies: 64
Views: 175704

Re: Does Image Magick have Tonemapping operators?

When I run convert -version I get "Features: HDRI" so I guess HDRI mode is on. It's probably a good idea and necessary to get the full range of the data initially. If you think about what you're doing in tonemapping, you're trying to take a floating-point valued image that can easily have 6+ orders ...
by ssilk
2011-05-18T17:50:53-07:00
Forum: Digital Image Processing
Topic: Does Image Magick have Tonemapping operators?
Replies: 64
Views: 175704

Re: Does Image Magick have Tonemapping operators?

Here they are. In some cases, resizing them can reduce the dynamic range somewhat if the high range is due to just a few isolated extreme high-value or low-value pixels that get lost/ averaged out in downsampling. I've listed the dynamic range of each below, and re-posted the original image you were...
by ssilk
2011-05-18T14:05:21-07:00
Forum: Digital Image Processing
Topic: Does Image Magick have Tonemapping operators?
Replies: 64
Views: 175704

Re: Does Image Magick have Tonemapping operators?

Fred, just some quick feedback on your latest results, they're really cool looking. You'll notice though that you're starting to get halos around sharp edges, most noticeable around the Ahmad tea tin on the left. From a tonemapping standpoint, these are considered a defect and a common pitfall of to...
by ssilk
2011-05-16T18:53:05-07:00
Forum: Digital Image Processing
Topic: Does Image Magick have Tonemapping operators?
Replies: 64
Views: 175704

Re: Does Image Magick have Tonemapping operators?

@fmw42: These results look good pretty good for how simple the operators are. I've posted results below from some other tonemappers that I've tested recently. The references for all of these tonemappers are provided in my earlier post in case they interest you, except Larson97 one which is from [1]....
by ssilk
2011-05-15T17:22:28-07:00
Forum: Digital Image Processing
Topic: Does Image Magick have Tonemapping operators?
Replies: 64
Views: 175704

Re: Does Image Magick have Tonemapping operators?

Hi, Regarding the IM mode, I don't know sorry. I remember spending a lot of time enabling HDR modes and installing (or trying to install) dependencies. If you can tell me how to quickly check what mode IM is in on my Windows machine, I'll check. When I actually read/write HDR images in C++ using Mag...
by ssilk
2011-05-15T14:14:40-07:00
Forum: Digital Image Processing
Topic: Does Image Magick have Tonemapping operators?
Replies: 64
Views: 175704

Re: Does Image Magick have Tonemapping operators?

Hi, I've posted two versions of the same image below. I never got Radiance (.hdr) I/O working properly with IM, so I use EXR myself. If you're working in Linux, Radiance should be easy to setup. I've also included two tonemapped versions to give an idea of what they should look like. The simplest to...
by ssilk
2011-05-13T14:13:27-07:00
Forum: Digital Image Processing
Topic: Does Image Magick have Tonemapping operators?
Replies: 64
Views: 175704

Re: Does Image Magick have Tonemapping operators?

Hi, Thanks for the response. Tonemapping, at least in the context of HDR images, refers to a class of algorithms designed to compress the large dynamic range of HDR images (often 6 orders of magnitude or greater) into a range that can be displayed on monitors, which are typically limited to around 5...
by ssilk
2011-05-13T10:57:21-07:00
Forum: Digital Image Processing
Topic: Does Image Magick have Tonemapping operators?
Replies: 64
Views: 175704

Does Image Magick have Tonemapping operators?

Hi, I thought I had read a while back that Image Magick included some tonemapping operators for compressing HDR images into 8-bit range. Am I wrong about this? I can't find any mention of it now, except that the HDRI Info page (http://www.imagemagick.org/script/high-dynamic-range.php) says you can a...
by ssilk
2011-01-21T19:17:24-07:00
Forum: Developers
Topic: Installation problems in Windows 7
Replies: 6
Views: 15603

Re: Installation problems in Windows 7

HI, thanks for the response. I've seen this explanation a few times, but I haven't seen any explanation of what a delegate program means. I downloaded a precompiled version of Radiance and it has a copy of ra_ppm.exe. Do I just need to copy this into the Image Magick folder somewhere? If so, can you...
by ssilk
2011-01-21T11:55:46-07:00
Forum: Developers
Topic: Installation problems in Windows 7
Replies: 6
Views: 15603

Re: Installation problems in Windows 7

OK, I got this working. You can download the Windows distribution (Visual Studio 2005) of OpenEXR from the OpenEXR website, extract it to a folder called "exr" in the main Image Magick folder (not the Visual Magick folder). Then run the configure utility, edit magick-config.h, add the following: #de...
by ssilk
2011-01-20T11:46:09-07:00
Forum: Developers
Topic: Installation problems in Windows 7
Replies: 6
Views: 15603

Re: Installation problems in Windows 7

That seems to have done the job for the most part. However, I'm still having trouble with HDR images. The following is a simple image copying program I made, and it works fine with JPEGs, but with .hdr or .exr images, it still builds fine, but when I run it I get a terminal message that "his applica...
by ssilk
2011-01-19T21:46:40-07:00
Forum: Developers
Topic: Installation problems in Windows 7
Replies: 6
Views: 15603

Installation problems in Windows 7

Hi all, I just want to use Image Magick to load HDR images into a C++ project of mine. I thought the easiest way to do this would be through the Windows Binary distributions, which include developer tools (header files, librarries, etc.). However, when I installed the latest version, I can compile t...