PTGui

PTGui is a commercial panoramic image stitching program for Windows and macOS. PTGui stands for Panorama Tools Graphical User Interface, and it provides an interface to the Panorama Tools stitching engine to assemble multiple photographs into high-resolution panoramas. The software is designed for professional and enthusiast photographers who need to stitch wide-angle or multi-row panoramas with control over alignment and projection.

Workflow: Users import overlapping images, then PTGui estimates alignment automatically using feature matching and control points, or the user can place manual control points to improve accuracy. The program supports various input formats, including RAW images from many cameras, and can apply lens corrections during stitching. It can handle different camera positions and lens distortion, with options to align and blend images and to detect and reduce ghosting caused by moving subjects.

Pro features: PTGui Pro adds HDR stitching and exposure fusion to merge bracketed exposures, advanced masking, seam blending, and ghost reduction; batch stitching and scripting for automated workflows; support for panorama projections such as equirectangular, cylindrical, fisheye, and cubemaps.

Outputs: stitched panoramas can be exported as high-resolution images or as multi-resolution web-ready panoramas. The software includes preview tools for checking seams and projection before export and supports exporting to formats suitable for virtual tours and 3D viewers.