HDR Viewer

GUI which displays HDR images, no bullshit.

Features

Opens popular HDR image formats: Radiance PIC (*.pic, *.hdr), PFM (*.pfm, *.ppm), OpenEXR (*.exr)
Exports images in Radiance PIC, PFM or OpenEXR format
Fast zoom, pan and brightness control
Manage multiple image documents in tabs
Compare opened images (absolute difference or side-by-side)
Thumbnails in Windows shell

Build

The only prerequisite is that Qt 5.5 or newer is installed on the system.

Checkout

git clone https://github.com/Acly/hdrv.git hdrv
cd hdrv
git submodule update --init
mkdir build
cd build

Updating submodules will download the required boost modules. You can skip this step and use an existing boost installation by passing "BOOST_ROOT=/path/to/boost/include" to qmake in the next step.

Windows - VC14

qmake -tp vc -r ../hdrv.pro

This generates a Visual Studio solution which can be used to build the application. After building, runtime libraries can be copied with windeployqt --qmldir ../viewer/view viewer/release/hdrv.exe.

Tested using Visual Studio 2015 Update 2 x64.

Thumbnails

A thumbnail shell integration is present for Windows in the subproject thumbnails. On x86 Windows installations the project must be compiled as x86 target and vice versa for x64 Windows installations to be compatible.

You can use the buttons in the UI to (un)install the thumbnail handler. Note that you should not move/delete the thumbnails.dll without uninstalling it beforehand.

To register the extension manually use an elevated shell and type:

regsvr32 thumbnails.dll

Removing the extension works by adding /u to the command:

regsvr32 /u thumbnails.dll

Linux

Building requires a C++14 compiler and OpenEXR 2.2.0 to be installed. Most distributions have precompiled packages available. To build run:

qmake .. && make

Tested using GCC 5.

Use

Load images by supplying them as arguments to the hdrv executable, drag-and-drop them into the viewer or use the Open image button in the tab bar.

Mouse controls

[ Pan ] Hold the left mouse button to view different regions of the image if it does not fit on the screen.
[ Zoom ] Use the mouse wheel to scale the image.
[ Compare ] Hold the right mouse button in comparison mode to move the image comparison separator.

Keyboard shortcuts

[ +/- ] Increase / decrease the image brightness.
[ Left/Right ] Iterate through images in the current folder.
[ 1/2/3/... ] Switch to image tab 1, 2, 3, ...
[ S ] Toggle between the last two image tabs.
[ C ] Open comparison mode for the last two images.
[ R ] Reset positioning and scaling of the image.

TODO

Show more stats (average / maximum / minimum color)
High quality tone mapping
Better support for existing formats (encodings, layouts)

theWayofthecode/hdrv