Full Dynamic Range Tools

Copyright © 2002-2020 Andreas Schömann


FDRTools 2.7.0 released

02 Aug 2020

This release is essentially a technical update with improvements to the internal structure of the program. A few bugs were discovered and fixed.


  • Version 2.7.0 is available for Windows 10 only. (An OS X version will be released once more new functionality is available.)

New or changed functionality:
  • Preferences section simplified, "File Formats" tab removed as it is not needed any more.
  • Several third party libraries have been updated.
  • A couple of bugs have been fixed.

Direct download link:

FDRTools 2.6.2 released

20 Mar 2012

This is a bugfix release (applies to OS X only).

Bugs fixed:

Direct download link:

FDRTools 2.6.1 released

19 Mar 2012

This is a bugfix release.

Bugs fixed:

Direct download link:

FDRTools 2.6.0 released

13 Mar 2012

FDRTools Advanced is now also available as 64 bit version. It utilizes all the system memory and hence can process much larger images than was possible with the previous 32 bit versions.

Note that version 2.6.0 does not introduce new functionality.

Bugs fixed:

  • GUI: loading/saving zip compressed images failed, see http://tech.groups.yahoo.com/group/fdrtools/message/72.
  • GUI: progress text was not correctly cleared after ending a task.
  • GUI: Unicode paths did not work on Windows.
  • GUI: create default projects/templates folder only if necessary.
  • GUI: add "All" to list of file formats of input file chooser again.
  • Preferences: passing output profile (-o) to dcraw did not work.
  • GUI: crash while loading image, see http://tech.groups.yahoo.com/group/fdrtools/message/80
  • OS X: some color profiles were not detected correctly and caused the program to crash.

Direct download link:

FDRTools 2.5.2 released

28 Jan 2012

This is a bugfix release.

Bugs fixed:

  • HDR Creation: Creative: when dragging one of the global weighting curves the resulting HDR image could become (and stay) black.
  • HDR Creation: Creative: when deselecting all layers the resulting HDR image is (and stays) black.
  • HDR Creation: switch off exposure value adjustment via dragging the mouse.

Direct download link:

This update is free of charge for registered users.

FDRTools 2.5.1 released

29 Dec 2011

This is a bugfix release.

Bugs fixed:

  • Tone Mapping: quick adjustments to tone mapping sliders resulted in false parameter values.

Direct download link:

This update is free of charge for registered users.

FDRTools 2.5.0 released

19 Dec 2011

Version 2.5.0 adds important usability features like "Undo/Redo" and fixes several stability issues.

New or changed functionality:

  • Make the source images directory the default for the output file chooser.
  • Tone Mapping: Compressor: redesign of "History" functionality. Using "Tabs" for branches it is now easier (and faster) to switch among branches.
  • Tone Mapping: Compressor: "History" resp. "Undo/Redo" functionality added.
  • Tone Mapping: Compressor: "Save/Load module state" feature added, also known as "Save/Load settings".
  • GUI: improve responsiveness of scrolling in Preview mode.
  • GUI: the Preview can now be zoomed via the mousewheel.
  • GUI: make selection in the "small" Navigator within Preview moveable by dragging via left mouse button.
  • GUI: hide (evtl. visible) Preview when closing a project.
  • Projects: derive project name and output file name from input images.
  • Preferences: option to configure the program language added.
  • Preferences: add "output color space" parameter to "Raw Conversion" tab.
  • System: add entry to the Windows registry so that FDRTools executable can be found from other applications.
  • External software: "dcraw" updated to v9.10 and "ExifTool" updated to v8.65.

Bugs fixed:

  • Calling FDRTools with images as arguments resulted in a small black stripe at the bottom of the Navigator.
  • OS X: calling FDRTools from the outside (Finder, Photo managing apps etc.) with images as arguments sometimes failed.
  • OS X: HDR Creation: Separation: possible crash, e.g. when using many source images (reported by Richard Sisk).
  • HDR Creation: Creative: ease a memory allocation peak possibly slowing down machines with little RAM.
  • GUI: several redrawing issues with Progress indicator and Navigator/Preview window.
  • HDR Creation: Creative: produced visible tiles in the saved image.
  • GUI: Navigator: pressing the Panorama buttons repeatedly could crash the application.
  • While loading images more memory than necessary was allocated.
  • Fixed the bug reported in http://tech.groups.yahoo.com/group/fdrtools/message/55.
  • Tone Mapping: Compressor: Contrast: Luminance failed to work for certain image types.
  • Fixed the bug reported in http://tech.groups.yahoo.com/group/fdrtools/message/53.
  • GUI: application may crash while resizing/scrolling the image preview.
  • Windows: program could not be started after installation.
  • Preferences were not saved when quitting the program.
  • HDR Creation: Separation: strange colors may occur in regions with moving objects (multithreading related).
  • HDR Creation: Separation: color shifts can occur when switching from Exif to Auto and back to Exif.
  • HDR Creation: Separation: choosing all color channels as separators causes grain in regions with strong colors.
  • HDR Creation: Separation: pressing the 'Defaults' button does not switch off separation mask and does not deselect layers.
  • HDR Creation: Separation: with active Separation module the program could crash during image saving.
  • HDR Creation: Separation: active separation mask caused crash when switching between tonemapping modules.
  • Projects: thumbnails from .dng's were not recognized.
  • Projects: project settings are lost if the "Save" dialog is active while the project settings are being saved.
  • Tone Mapping: Compressor: Postprocessing curve: changing dynamic range and collapsing the curve caused problems.
  • Tone Mapping: Compressor: the label text of slider "Smoothing" is not always redrawn if the tooltip of the "Compressor" slider is being displayed.
  • GUI: improve behaviour of the main window Close button.

Direct download link:

  • With version 2.5.0 support for the Mac Power PC platform is abandoned.

This update is free of charge for registered users.

FDRCompressor Plug-In 3.0.3 released

23 May 2011

This release fixes a bug in the Windows OS installer.

Bugs fixed:

  • Detection of installed Photoshop versions does not recognize the latest Photoshop version CS5.
Direct download link:
This update is free of charge for registered users.

FDRTools 2.4.0 released

24 Jan 2011

Version 2.4.0 brings new features and many improvements to the "innards". It is now possible to process large images. Introduction of multithreading utilizes the power of multicore processors. Moreover new options allow for more control over the tone mapping process.

New or changed functionality:

  • Tone Mapping: added slider "Color Contrast" to the Compressor module. Color Contrast allows to adapt the contrast of colored regions.
Bugs fixed:
  • OS X: Navigator/Preview: scrolling the image in Preview mode can crash the program.
  • Navigator/Preview: dragging the image in Preview mode is sluggish.
  • Navigator/Preview: correct Preview scale slider range so that zoom value increases from left to right.
  • Projects: exiting FDRTools after modifying the project name without leaving the name text field looses the modifications.
  • Tone Mapping: curve control has a problem drawing first and last knot under certain conditions.
  • Tone Mapping: correct Receptor Compression range.
  • Gui: opening the Save Image dialog via the "Images->Save as..." menu entry crashes the program.

Direct download link:
This update is free of charge for registered users.

Changes Beta6:

New or changed functionality:
  • Make "Simplex" the default tonemapper (because of computational requirements of "Compressor").
Bugs fixed:
  • Save file dialog: delete file name when closing the project.
  • Tone Mapping: modified the value range of Black and White Point sliders in order to avoid possible display problems.
  • OS X: Tone Mapping: locking problem caused crashes when handling curve points.
  • Application could crash when pressing the main window "Close" button while processing is going on.
  • Disable curve control function to change axis ranges via first/last curve point. While this functionality is handy it puts restrictions to the first/last curve points.

Changes Beta5:

New or changed functionality:
  • Integrate HDR and LDR save dialogs.
  • Create replacement for former HDR Inspector view. Consider HDR as a special case of tone mapping, i.e. identity mapping.
  • Augment curve control capabilities by allowing to change y-axis range interactively.
  • Add new controls to tone mapping dialogs (Exposure, Dynamic Range, Black Point, White Point).
  • Add possibility to modify "image resolution" metadata fields prior to saving the resulting image.
  • Color space of HDR image is now configurable.
  • Preview zoom range extended to 400%.
  • Module xDOF temporarily removed. xDOF makes real sense only with comprehensive image alignment which is not there yet. I'm sorry.
Bugs fixed:
  • Zoomed view could crash when dragging the scrollbars (related to multi threading changes).
  • Make controls in alignment and HDR creation modules responsive.
  • Remove blockade between push and drag events in curve widgets.
  • Pink highlight problem of some Canon 50D cameras fixed.
  • Problem reading project files of future FDRTools versions fixed.
  • Program crashed when pressing the Close button of the main window during a computation.
  • Various issues of the White Balance tool solved. The issues are mostly related to multithreading support introduced with v2.4.0.

Changes Beta4:

New or changed functionality:
  • Integration of former 'Navigator' and 'Preview' windows.
  • Integration of former 'Progress' window with the Main window.
  • Make controls "responsive". E.g. when dragging a slider the screen is updated without the need to release the slider.
  • Performance: reduced memory usage, especially when working with many source images.
  • Performance: optimisations in tone mapping modules.
Bugs fixed:
  • Reading 16 bit TIFF images could crash the program.
  • Memory leaks fixed.
  • Fixed potential crash situations caused by introducing multithreading.

Changes Beta3:

New or changed functionality:
  • Performance: several optimizations in order to speed up algorithmic calculations and image loading.
  • Preferences: added feature to detect system display profile. If enabled the detected profile is used instead of the manually configured profile.
Bugs fixed:
  • "Out of memory" message close button showed no reaction hence application couldn't terminate.
  • Quick repeated use of the white balance tool pipette freezes the program.
  • Receptor tone mapper had a bug introduced in the course of the modifications for v2.4.0.
  • Projects: added missing parameters and repaired unsaved check.
  • Switching among HDR generators could cause a crash in certain situations.

Changes Beta2:

Bugs fixed:
  • Program crashed when trying to read project files from versions earlier than 2.3
  • Once in a while crash on cancelling project changes.
  • Coordinates and RGB value within Preview were not displayed correctly.
  • Resulting images of integer formats were always scaled to the maximum integer value thereby foiling deliberate downscaling by the user.
  • Images were not correctly "prepared". When reading prepared images histograms were missing alongside other side effects.
  • Histograms were not always drawn correctly - missing histograms or flickering.
  • Redraw behaviour of Preview had a few shortcomings.
  • Drawing of tabs has been slightly modified.
  • "Color Plus" button was activated when pressing "Defaults" with only one image loaded.

Changes Beta1:

New or changed functionality:
  • Ability to process large images.
  • Support for multicore processors / multiprocessor systems.
  • New controls broaden the tone mapping options and allow for more precise adjustments.

FDRTools 2.3.3 released

11 Jan 2011

This release fixes a critical bug in version 2.3.2.

Bugs fixed:

  • Reading project files of future FDRTools versions (e.g. the 2.4.0 Beta versions) crashes the program.
Direct download link: This update is free of charge for registered users.

Change to Support

15 Dec 2010

Important: support for FDRTools is undergoing a change at the end of this year.

For several years this Forum was the main source of support for FDRTools - in addition to personal email. I chose this form mainly because the forum software provided an easy way to archive discussions and to find them again at a later time and hence find answers to your question fast, provided the topic was discussed some time in the past.

However forum solutions have drawbacks:

  1. First and foremost there is spam. It is hard work to keep a forum free from spam messages and almost impossible to keep spammers from registering to the forum.
  2. Secondly the web only interface to the forum software is not convenient. Writing messages works but it is a lot less comfortable compared to writing messages with an email client. What's more: you have to visit the website or use feeds to get the latest messages. That is not convenient when compared to the simple pushing mechanism of mailing lists.
  3. Finally personal email was not communicated to other users even if the topic was of common interest. Some users simply refused to use the forum software.

I won't complain too much. The forum worked ok and did it's job. But now is the point to switch to a mailing list. Hopefully this step eliminates the problems mentioned above. So I have decided to open a FDRTools Yahoo Group and close the forum at the end of this year. More officially:

On 31/12/2010 the FDRTools forum will be switched to read only access. This means: registering to the forum will be disabled. Moreover posting messages will not be allowed any more, neither new ones nor replies. However, the forum will be further available as a read only resource for a transitional period. This means you can still search the forum and read earlier postings. The forum will ultimately be closed on 30/06/2011.

Starting with today the following Yahoo Group will serve as a replacement for the forum: http://tech.groups.yahoo.com/group/fdrtools

You can join the group now and start posting messages.

Current forum users: there will be NO automated migration of existing accounts to the Yahoo Group. If you have further interest in FDRTools please join the Yahoo Group. Thank you.

Concerning current forum message base: there will be NO automated migration of forum messages to the FDRTools Yahoo Group. If questions arise that have been discussed in the forums earlier we will discuss them again in the FDRTools Yahoo Group. There is no problem with that.

Andreas Schömann

PS: please do not try to get support via personal email any more. Instead post your concern to the FDRTools Yahoo Group. Thank you.

FDRCompressor Plug-In 3.0.2 released

20 Apr 2010

This release fixes an OS X specific critical bug.

Note: the Windows version is not affected and stays at 3.0.1.

Bugs fixed:

  • OS X: it looks like with OS X system upgrade to 10.6.3 one of the API functions related to color management has ceased to work. This function was used by FDRCompressor which in turn could cause Photoshop to hang/crash when calling the plug-in.
The user documentation can be found at http://www.fdrtools.com/documentation/compress_dynamic_range_e.php

Direct download link:

This update is free of charge for registered users.

FDRTools 2.7.0 released
02 Aug 2020
This release is essentially a technical update with improvements to the internal structure of the program. A few bugs were discovered and fixed.
[read more]
FDRTools 2.6.2 released
20 Mar 2012
This is a bugfix release (applies to OS X only).
[read more]
FDRTools 2.6.1 released
19 Mar 2012
This is a bugfix release.
[read more]
news history