Dirty RTI

Introduction

This tutorial explores the concept and application of Reflectance Transformation Imaging (RTI) as presented in the "Dirty RTI" video by Recording Archaeology. RTI is a powerful technique used to capture the surface details of objects, revealing hidden narratives and complexities. This guide will walk you through the process of using RTI, highlighting its relevance in the fields of archaeology and experimental art.

Step 1: Understanding RTI

• RTI is a method that utilizes multiple images of an object taken from different light angles.
• The technique allows for the visualization of surface details that may not be immediately visible to the naked eye.
• This method is particularly useful for analyzing artifacts, revealing information about their history and production.

Practical Tips

• Familiarize yourself with the basics of photography and lighting.
• Consider the materials and equipment needed for capturing high-quality images.

Step 2: Setting Up the RTI Process

• Choose the object you want to document.
• Prepare your workspace, ensuring adequate lighting and a stable setup.
• Use a consistent background to avoid distractions in your images.

Equipment Needed

• A camera with manual settings.
• A tripod to stabilize your shots.
• A light source that can be moved around the object to capture different angles.

Step 3: Capturing Images

• Take a series of photos while varying the angle of your light source.
• Aim for at least 24 images from different angles to ensure comprehensive coverage.
• Keep consistent camera settings for each shot to maintain uniformity.

Common Pitfalls to Avoid

• Don’t change camera settings between shots.
• Avoid reflections or shadows that may obscure detail.

Step 4: Processing RTI Images

• Use RTI software to compile your images into a single interactive model.
• The software will analyze the light variations from your photos to create a 3D representation of the object’s surface.

Software Recommendations

• Consider using software like RTI Builder or similar tools designed for RTI processing.

Step 5: Analyzing the RTI Output

• Once processed, examine the interactive model for details that were previously hidden.
• Look for signs of wear, reworking, or other features that provide insight into the object's history.

Real-World Applications

• Use RTI in archaeological research to study artifacts.
• Implement the technique in art projects to explore concepts of space and time.

Conclusion

Reflectance Transformation Imaging is a valuable tool for uncovering the hidden narratives of objects. By following these steps, you can effectively capture and analyze artifacts, enhancing your understanding of their significance. As you gain experience with RTI, consider exploring its applications in both archaeological research and experimental art to further enrich your projects.