AstroGraph App: A SmartPhone and Desktop Astronomical Image Analysis Tool

Abstract

AstroGraph is a cross-platform astronomical image analysis application designed for both mobile and desktop environments, including iOS, Android, macOS, and Windows systems. Unlike traditional desktop-centred astronomical software, AstroGraph enables real-time astrophotographic image analysis directly from mobile devices attached to telescopes or from uploaded observational datasets. The software integrates advanced analytical features including pixel-level celestial signal decomposition, brightness correction, stellar temperature mapping, and structural morphology detection for nebulae, stars, and galaxies. To evaluate the reliability of the brightness and colour standardisation algorithm implemented in AstroGraph, a dataset of 200 imaging conditions was analysed across 16 colour standards. Statistical analysis was conducted using Microsoft Excel developed by Microsoft Corporation (Redmond, Washington, USA). For a single Red–Violet colour standard imaged under 200 varying conditions, the standardised dataset exhibited a standard deviation of 3.05, compared to 35.46 for non-standardised data, demonstrating substantial improvement in measurement reproducibility. Across all 16 colour standards, the mean standard deviation decreased from 39.44 to 4.45, while the mean error percentage decreased from 69.59% to 44.78% following brightness and colour standardisation. Post-hoc power analysis (α = 0.05) indicated statistical power exceeding 99% (β ≈ 0.01), confirming the robustness of the dataset. The results demonstrate that AstroGraph significantly improves the reproducibility of astrophotographic measurements while enabling real-time celestial signal interpretation in both field and laboratory environments. By combining mobile accessibility with advanced image-analysis functionality, AstroGraph provides a versatile platform for professional astronomers, astrophysicists, and amateur observers engaged in modern astronomical imaging.