The PTGui application was designed to be panoramic stitching software for Windows and Mac OSX. Originally developed as a Graphical User Interface for Panorama Tools (hence the name), PTGui now is a full featured photo stitching application.
PTGui comes in two versions: PTGui and PTGui Pro. The main difference between the two versions is support for HDR stitching, viewpoint correction and vignetting, exposure and white balance correction in PTGui Pro.

· Automatic stitching: create panoramas with just a few mouse clicks
· Manual mode: full control over the final result
· Live preview: instantly see the effect of different settings, without the need to stitch first
· Multi row panoramas: images can be stacked both horizontally and vertically
· Many panoramic projections
· Stitch rotated and tilted images
· Create HUGE panoramas: stitch hundreds of images into multi gigapixel panoramas
· Support for jpeg, tiff and png source images
· Support for many camera RAW source images (through dcraw)
· Create panoramas in jpeg, tiff or Photoshop format
· Photoshop large document (.psb) support (output only)
· Layered Photoshop output, ideal for retouching
· Full support for 16 bit images, for the best image quality
· Panorama editor: interactive adjustment of the panorama perspective
· QTVR ouput: directly create interactive QuickTime VR panoramas, or convert an existing panorama into QTVR format
· Support for multiple processors / multiple core computers
· Create templates with frequently used settings
· Batch stitcher: prepare your projects and send them to the batch stitcher for stitching when you are away from your computer
· Batch Stitcher can generate control points and set up a panorama
· Batch Builder: scan folders for panoramic source images and automatically create projects based on a template
· Support for Batch Lists (save and load a list of jobs for the Batch Stitcher)
· Stitch and blend HDR source images into an HDR panorama
· Stitch and blend bracketed LDR source images into an HDR panorama
· Calculate camera response curve from bracketed LDR source images
· Built in tone mapper
· Support for OpenEXR (.exr) and HDR Radiance (.hdr) source images
· Blend Priority parameter (useful for blending the nadir image in a spherical panorama)
· Viewpoint correction
· Vignetting, exposure and white balance correction
· Global adjustment of exposure and white balance
· Exposure Fusion
· Configurable Project Settings: control the behaviour of templates, custom default file names and more

Requirements:
· 1 GB of RAM
· At least 1 GB free disk space (for temporary files) is recommended

Limitations:
· Stitched panoramas will have a visible watermark
· Saves only the first 2 images of panorama
· The Panorama Tools stitcher and optimizer are not supported (only the built-in PTGui stitcher and optimizer)
· The trial version expires. Updates will be downloadable from this website
· Nag screen

What's New in This Release:
· Fix: inaccurate automatic control point placement for circular fisheye images
· Undo is now possible after saving the project. Previously saving the project would clear the Undo stack.
· Help button added to the Batch Builder
· PTGui Viewer: Fix: improved responsiveness in WebGL mode for large panoramas
· PTGui Viewer: Fix: on iPhone4 and iPad2 the viewer would only work properly after reloading the panorama
· PTGui Viewer: Fix: viewer could incorrectly register a drag as a double click and switch to full screen mode
· PTGui Viewer: On iPad/iPhone switching to full screen may take a second or two. Viewer now displays 'please wait' while switching to full screen