hdr panoramic photography

HDR Panoramic HDR Panoramic PhotographyPhotography

Introduction

• Houston• Texas A&M University– Studied Architecture and Visualization

Sciences

• IT Consultant• Architectural Photographer• @dvmorris• dvmorris@gmail.com • http://dave.showviz.net/• http://topmod3d.org/

HDR Photography

• Set of Techniques with origins dating back to 1850s

• Allows greater ranges of luminance between light and dark areas of an image

• Achieve details in the highlights and shadows of an image at the same time

Under and Overexposed Images

Viewing Problem

• Traditional screens (CRTs, LCDs) and printers display a low dynamic range (LDR) of luminance (300 levels)

• Human eyes have a high dynamic range of luminance detection (50,000 levels)

• We don’t have a good way to view real HDR images (yet)

Tone Mapping

• Until display and print technology catches up we have to map HDR images to LDR images

• Global and local algorithms

• Tries to balance strong contrast reduction and image details in shadows/highlights

Tone Mapping Demo

Panoramic Photography

• Elongated field of view (160° x 75° or greater)

• Techniques dating back to 1850s

• Rotate camera about the nodal point – the optical point from which the focal

length is measured

• Eliminate parallax

Panoramic Photography

• Gigapan.org

Panoramic Photography

• Xrez.com

Panoramic Photography

• Me

Panoramic Photography

• Me

Panoramic Photography

• Me

HDR Panorama Demo

• Stuff– DSLR Camera with manual settings (and

AEB!)– IR Remote Control– Tripod– Nodal Ninja

• Software– Autodesk (REALViz) Stitcher– Photomatix HDRSoft– Bulk Rename Utility

Other Tools• Paid HDR Software

– Photomatix, Dynamic Photo HDR, Enfuse for Lightroom

• Open Source HDR Software– Qtpfsgui, Picturenaut, FDRTools Basic, Essential

HDR

• Paid Panoramic Software– Autodesk Stitcher, PTGui, Photoshop

• Open Source Panoramic Software– Panotools, PTStitcher

Questions?