align_image_stack − Align overlapping images for HDR or focus stack creation
align_image_stack [options] input files
align_image_stack is used for the alignment of slightly misaligned images or for the registration of a stereo images pair. When several differently exposed images are taken in the process of creating a High Dynamic Range image, the images are not perfectly aligned, and the quality of the HDR image created will suffer from this. align_image_stack uses the tools available to hugin to optimize the roll, pitch and yaw, as well as some parameters of the lens geometry, to align the images.
Modes of
operation:
−p file
Output .pto file (useful for debugging, or further refinement)
−a prefix
Output aligned images as prefix_xxxx.tif
−o output
Align images and merge them to HDR, generate output.hdr
Modifiers:
−v |
Verbose, print progress messages. Repeat for higher verbosity | ||
−e |
Assume input images are full frame fish eye (default: rectilinear) |
−t num
Remove all control points with an error higher than num pixels (default: 3)
−f HFOV
Approximate horizontal field of view of input images, use if EXIF info not complete
−m |
Optimize field of view for all images, except for first. Useful for aligning focus stacks with slightly different magnification. | ||
−d |
Optimize radial distortion for all images, except for first. | ||
−i |
Optimize image center shift for all images, except for first. | ||
−S |
Assume stereo images − allow horizontal shift of control points. | ||
−A |
Align stereo window − assumes −S | ||
−P |
Align stereo window with pop-out effect − assumes −S | ||
−C |
Auto crop the image to the area covered by all images |
−c num
Number of control points (per grid) to create between adjacent images (default: 8)
−l |
Assume linear input files |
−s scale
Scale down image by 2^scale (default: 1 [2x down−sampling])
−g gsize
Break image into a rectangular grid (gsize x gsize) and attempt to find num control points in each section (default: 5 [5x5 grid])
−h |
Display help summary. |
Written by Pablo d’Angelo. Also contains contributions from Douglas Wilkins, Ippei Ukai, Ed Halley, Bruno Postle, Gerry Patterson and Brent Townshend. Stereo functionality added by Vladimir Nadvornik.
This man page was written by Cyril Brulebois <cyril.brulebois@enst−bretagne.fr> and is licensed under the same terms as the hugin package itself.
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.