wkjarosz/hdrview

A simple research-oriented image viewer with an emphasis on examining and comparing high-dynamic range (HDR) images, and including minimalistic editing and tonemapping capabilities.

hdrview's Issues

add copy/paste between images

Add right-click menu on side panel to choose solo-mode or not

CMake configure needs to be run twice, otherwise build fails.

Seamless paste buggy when pasted image runs off image boundary

add rudimentary drawing/painting/clone stamp support

Tools which support temporary raster display and then finalized when mouse is released

e.g. a healing brush which shows up as a clone stamp while painting, and then performs the poison reconstruction after letting go of the mouse.

add shift-click to draw straight lines with brush tools

Allow filters to show interactive previews

fix placement of tooltips so they don't run off the right edge of screen

dragging sidebar edge should be disabled while clicking on dialog

Convert Edit panel into a menu bar (or right-click menu)

May require enhancing popupmenu to be hierarchical.

Rectangular selection support

Adding rectangular selection support would be pretty easy, and would be a first step towards some nice additional features:

• report pixel statistics (mean, median, min, max) for a region
• running a filter/image editing operation only on the selection
• cropping to selection
• copy/paste between images

Support arbitrary number of channels

Would likely require:

1. a major restructuring of the HDRImage class to store channels as continuous 2D arrays (instead of each pixel containing fixed RGBA values). Upside: image processing and storage clean and simple; downside: would need to copy/reinterleave pixels when uploading to GPU.
2. HDRImage stays as is, and arbitrary channels get grouped into multiple HDRImages (and XPUimages) each stored as (potentially wasteful) 4 channel images. e.g. stereo depth could use two channels of an HDRImage, hyperspectral images would need to be split into groups of 3 or 4 channels.

Add duplicate image functionality

Add support for "Solo mode" in side panels

Make alphabet sorting use natural sort order

http://www.davekoelle.com/alphanum.html
https://stackoverflow.com/questions/642213/how-to-implement-a-natural-sort-algorithm-in-c

CI build windows binaries seem to crash on windows

Can't easily test without a windows machine. PRs welcome.

Fix reference image UVs and alpha

Images with alpha channels don't view properly in ImageView before a refererence image has been selected. Also, reference images are displayed stretched (likely an issue with UVs).

Upload subregions of GPU texture

If we want to later add paint/airbrushes, then we'll need to be able to upload 2D portions of the image to the GPU instead of the entire image. Will require modifying nanogui's texture interface.

In openGL this would use glTexSubImage2D. In Metal probably replaceRegion.

stale pixel/color info persists after closing images

add free-transform/homography-transform tool

add channel mixer

HDR merging and tonemapping

Add support for filters to produce new images, instead of just modifying selected image

Crash/race condition between histogram and image filters

The lazy histogram computation accesses the HDRImage in an unguarded way, so if an image edit/filtering operation is started this leads to a race condition and a crash.

Suggested fix: histogram computation should take a progress object that can be canceled. Any new image edits/filters should first cancel and wait before starting to edit.

Can also use this to fix the issue that closing an image currently requires waiting for the histogram to finish being computed.

Improved tool overlays

Clonebrush tool could show not just the ellipse of the brush, but the source raster texture overlaid on the image. Similar for paint brush.

Port ImageView shaders to support Metal

ImageView class currently uses glsl shaders. These should be split into separate files and different shaders should be used to support HDRView being compile for Metal support.

store log level in config file

Have pixel info and histogram respect blend/channel modes

Removing Eigen dependency

add measure tool

Improve keyboard shortcuts

• allow moving between reference images using shift + arrows

logging verbosity

Hello,

First, I am a big fan of hdrview. I think it's a really good tool to compare exr/hdr images.

At latest master (3a9689c), the logging seems to become overly verbose if I hold the mouse button down and drag the image around (screenshot):

I am not sure exactly when it started to happen, but should be after the project migrated from bitbucket.
Is it possible to add a flag to adjust the verbosity, or simply remove this kind of spammy logs?

Thanks!

incorporate FLIP image comparison

Image blend modes not working in Metal

Add filter to clear/set alpha to a constant

Add support for visualizing polarization images

As described here: https://cgg.mff.cuni.cz/~wilkie/Website/Home_files/polvis_sccg_2010.pdf

SH irradiance convolution for envmaps

add info/stats panel (mean, median, min, max) for selected region as well as whole image.

Add absolute value visualization mode

Add support to select multiple images and run filters on all selected images

Fix GitHub Actions CI workflow

Create automated releases from GitHub CI workflow

Check here: https://github.com/actions/create-release

add widget focus order (by pressing tab)

probably requires a change at the nanogui level

add greyscale/monochrome filter

Enhance image list view

Some nice features to add:

• support both left and right alignment of filenames
• sort files
• support drag-drop to reorder images (possibly based off a patch to tev)

Allow filters to operate on the GPU and read back image data

gradient domain copy-paste

add eyedropper tool

add line tool