SolStretch v1.1.1 – PCA-based decorrelation stretch for RGB images

SolStretch is a Shiny web application designed to apply decorrelation stretch to RGB raster images (TIFF or JPEG), enhancing visual contrast and improving feature visibility using a PCA-based transformation.

This tool is especially useful for:

• Enhancing faint rock art and cave paintings
• Highlighting subtle color variations in sedimentary profiles and stratigraphy images

This version (v1.1.1) includes:

• Improved layout and design
• Adjustable percentile sliders for custom contrast enhancement
• Brightness and contrast correction
• Reset button for interactive exploration
• Output options: TIFF or JPEG
• Embedded preview and download
• Icons and branding support

Originally developed to assist in the visual enhancement of archaeological and parietal art images.

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🔗 Try locally with R

shiny::runApp("SolStretch_1.1.1")

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📖 Citation:
If you use this tool, please cite:

    Solano García, J. A. (2025). SolStretch: Shiny App for Decorrelation Stretch of Raster Images (1.1.1). Zenodo. https://doi.org/10.5281/zenodo.15202207

🛠️ License: CC BY-NC 4.0 – Academic and personal use only
<img width="1124" alt="SolStretch_Desktop" src="https://github.com/user-attachments/assets/c7883794-4243-4f1f-b2af-5b9ba824ab8f" />