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AOI: Atmospheric Optical Image Enhancer

AOI logo

>日本語

'AOI' is an image processing application, mainly for enhancing photographs of atmosphric optical phenomena like halos. Dropping or pasting an image onto window and selecting a recipe, then please push the 'start' button to process the image. The result image can output to file or copy-and-paste to other applications.

> Download

AOI Window Snapshot 1 AOI Window Snapshot 2

Available Processes

autoBR / autoBR+U / autoBRv2 / autoBRv2+U / SCR (Sky-Color Regression) / SCR+U / B-R / B-R(+U) / B-G / B-G(+U) / autoRG / autoRG+U / autoRGv2 / autoRGv2+U / Unsharp Mask / UnsharpEX

original image autoBR Sky-Color Regression (SCR) SCR+U unsharpEX'ed
Original autoBR SCR SCR+U UnsharpEX
original image autoBR Sky-Color Regression (SCR) SCR+U unsharpEX'ed

autoBR

(Tuned) B-R processing with automatic adjustment of the 'constant' parameter. The ratio parameters for R, G, B are pre-defined, which values exceed the value you can set on Photoshop/Paint Shop Pro. Approximately, it is "Blue channel minus Red channel" process. This process reduces contrast of clouds and enhance (colored) halos in a photo.

Sky-Color Regression (SCR)

Refined algorithm based on autoBR. The ratio parameters are automatically configured. More details are described in a preprint.

autoBRv2

A newer version of autoBR. In this version, the 'constant' parameter is locally adjusted.

autoRG

A variation of autoBR. Approximately, it is "Red channel minus Green channel" process. Try it for an image for which the 'autoBR' seem not to work well.

autoRGv2

A newer version of autoRG. In this version, the 'constant' parameter is locally adjusted.

B - R

A normal B - R processing, but the 'constant' parameter is adjusted automatically.

B - G

A normal B - G processing (introduced in this page), but the 'constant' parameter is adjusted automatically.

*+U (*U)

UnsharpEX after autoBR/SCR/... . The target image will be shrinked

Unsharp Mask

Unsharp mask with bigger parameters (well-known method to enhance minute difference of halo colors and/or intensities). The weak point is that it also enhances edge of silhouettes of objects hiding the light source. The target image will be shrinked.

UnsharpEX

A revised unsharp mask to defeat the weak point, which is less sensitive for larger difference of colors and intensities. The target image will be shrinked.


Reference:
Yuji Ayatsuka, "Revealing Halos Concealed by Cirrus Clouds" EGUsphere [preprint], doi:10.5194/egusphere-2023-456, 2023

Download and Try AOI

AOI Version 0.3 beta1 (2023/09/20)
Download: AOI_v0.3b1.zip (40,156,193 byte)

Extract the ZIP and invoke AOI.exe to go. Please read readme_EN.txt for more details.

Required Environments

  • Windows (64bit OS)
    • I've checked the application on Windows10/11. It will work on Windows 8 or earlier 64bit Windows.
    • If you have installed JDK (Java 8 or later) on your PC, the application can run without jre-desktop/.
    • The .exe file is made by applying exewrap to application written in Java.

Notices

  • NO WARRANTY
  • This application is under development (as my hobby project) and this is a kind of beta version. Please try to process many images and report the result to the author will help the revision of the application.
  • You can upload/publish processed images freely to an SNS or other medias. (A mention like "processed by AOI/autoBR" "processed by AOI/SCR" "#AOI_SCR" "#AOI_autoBR" "#AOI_autoBRU" will make the author happier :-)
  • If you have some questions or comments, please contact via mail or Twitter (@ayatsuka_yuji).
Contact: aya@star.email.ne.jp.cut_off_here Copyright 1998-2023, AYATSUKA Yuji