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2026-10-09 APP 2.0.0-beta48 has been released !

This is mainly a bug fix release for the reported bugs in beta47. In addition it has a significant User Interface performance improvement noticable when you need to process 1000s of images in APP.

2026-10-03 APP 2.0.0-beta47 has been released !

This is a very big release... many code optimizations/rewrites, many parts of APP are much faster and more precise, especially star analysis and registration are much faster ! Big mosaics will go much faster 🙂

And we introduce a new preview filter, which includes the new Adaptive Deep Sky Stretch and a General Levels Stretch, this has been long over due. The old preview filter (the panel on the right side to stretch and preview your data) has not been updated for a couple of years and it is a critical part of any APP session.

Adaptive Deep Sky Stretch or ADSS is a much more intuitive stretch algorithm. It is also color preserving (which is a great new addition in itself ! ) which means that the highlights are no longer bleached, color is maintained from the linear data while stretching. You can simply stretch your data using the sky background level and signal width sliders which work much easier and more intuitive. You no longer need to fiddle with the old complicated sliders with zoom buttons. All the zoom buttons for the sliders are made redundant. And you can enter slider values in the slider value fields yourself. I will make a youtube video in the coming days to explain and fully introduce ADSS. Once the video is ready, it will be highlighted on the forum.

RGB Combine upgrade !. The RGB Combine Tool has been rewritten mostly. The tool is faster and easier to use and most importantly, the Luminance slider to inject a luminance channel or channels into the RGB composite is now working correctly. It no longer bleaches the RGB colors. Combined with the new ADSS preview, you will get much better and easier great composites with great color! I will also explain this in a new youtube video.

Tutorials & Workflows

forum with specific tutorials and workflows
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LRGB processing

First post and replies  | Last post by Mabula-Admin, 5 months ago

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Combining R, G, B with Ha & OIII data using an Optolong L-eNhance filter (2 viewing)

First post and replies  | Last post by Michael Becker, 1 year ago

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Light integration settings with large number of subs

First post and replies  | Last post by Mabula-Admin, 1 year ago

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Ha + OIII Dual Narrowband Workflow

First post and replies  | Last post by Mabula-Admin, 3 years ago

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APP Quick Start Guide - Charles Bracken

First post and replies  | Last post by Mike Lockwood, 4 years ago

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Data calibration principles/rules - must read ! (2 viewing)

First post and replies  | Last post by Nick West, 4 years ago

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Creating a Bad Pixel Map (4 viewing)

First post and replies  | Last post by Anonymous 174, 4 years ago

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What is Drizzle and when can I benefit from it ? (1 viewing)

First post and replies  | Last post by selsky_lekar, 5 years ago

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Astro Pixel Processor – Podstawy / Polish Basic tutorial

First post and replies  | Last post by pekdar, 5 years ago

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Combining subs with multiple exposure time

First post and replies  | Last post by Anonymous 174, 6 years ago

13699
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RGB Combine tool: a LHaRGB example using H-alpha as both Luminance and Red.

First post and replies  | Last post by Anonymous 174, 6 years ago

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Creating an artificial flat

First post and replies  | Last post by Michael Auton, 6 years ago

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HaRGB and LHaRGB workflow and star color calibration (1 viewing)

First post and replies  | Last post by Anonymous 174, 6 years ago

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Tricky Mosaic workflow, alignment problem

First post and replies  | Last post by kajouman, 6 years ago

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Tutorial (Linux): How to run APP on a powerful server remotely

First post and replies  | Last post by kecsap, 6 years ago

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Fully Automatic Multi-Channel Processing with Trifid Nebula R,G,B data from Diego Colonnello (1 viewing)

First post and replies  | Last post by Mabula-Admin, 8 years ago

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Calibrating data with a Sony BSI IMX183 C/M sensor - ASI183, Altair Hypercam 183, QHY183 - removing the severe Amp-Glow patterns

First post and replies  | Last post by rcfmitch, 8 years ago

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How can I save the originally loaded data, or the stretched data, as shown in the image viewer ?

First post and replies  | Last post by Mabula-Admin, 9 years ago

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Star Color Calibration 1.58 - an example using Frank Schmitz's M101 composite with complete explanation of the tool

First post and replies  | Last post by elgol, 9 years ago

20049
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How to correct a stack/integration for vignetting

First post and replies  | Last post by Mabula-Admin, 9 years ago

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Interpolation artifacts with Lanczos, Catmull-Rom Spline, Mitchell-Netravali, Cubic B-Spline

First post and replies  | Last post by Mabula-Admin, 9 years ago

18837
3

What is the bias pedestal and why does it matter?

First post and replies  | Last post by Mabula-Admin, 9 years ago

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LRGB is not working in RGB Combine

First post and replies  | Last post by Mabula-Admin, 5 months ago

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Combining "yesterdays" RGB images LRGB

First post and replies  | Last post by Mabula-Admin, 7 months ago

863
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Two panel M31 (first mosaic attempt)

First post and replies  | Last post by InFINNity Deck, 7 months ago

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White balance doesn't work for ASI585MC

First post and replies  | Last post by Mabula-Admin, 7 months ago

872
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Narrowband Osc Workflow Tutorial Or Video

First post and replies  | Last post by Mabula-Admin, 9 months ago

1082
5

Using the Optolong L-Synergy with L-Extreme

First post and replies  | Last post by Mabula-Admin, 10 months ago

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Using the Optolong L-Synergy with L-Extreme

First post and replies  | Last post by Gilles Naud, 12 months ago

886
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Ha -OIII OSC Combine issue

First post and replies  | Last post by Michael Becker, 1 year ago

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