This software registers two images using the transformation of the Cartesian coordinate system (similarity
transformation). The images may have translational, rotational, and scaling differences. The user selects the
images to be registered. The program will then automatically register the images and display the result.
Assumptions: It is assumed that
Satellite images and images obtained at nadir view by an aircraft at different flight paths and possibly from
different altitudes of a scene can be registered by this software. If any of the above assumptions is not
satisfied, the program may register the images inaccurately or incorrectly.
Modes of operation: The program operates at three different modes:
transformation). The images may have translational, rotational, and scaling differences. The user selects the
images to be registered. The program will then automatically register the images and display the result.
Assumptions: It is assumed that
- the images have only translation, rotation, and scaling differences,
- scaling difference between the images is within a factor of 2,
- the images are in the same modality,
- at least 50% overlap exists between the images.
Satellite images and images obtained at nadir view by an aircraft at different flight paths and possibly from
different altitudes of a scene can be registered by this software. If any of the above assumptions is not
satisfied, the program may register the images inaccurately or incorrectly.
Modes of operation: The program operates at three different modes:
- Default mode: This is a fast initial mode used to register the images quickly. For many images, this is
sufficient. - Redo mode: For images with considerable intensity differences, it may be necessary to redo the
registration using a larger number of landmarks. The user presses a Redo button after viewing the
registration result of the default mode. - Refinement mode: In this mode, the positions of the landmarks are more accurately determined by
template matching and the registration is repeated. An example of image registration by this software is
given below.
Fig. 1. (a) A Landsat TM image. (b) A Landsat MSS image. (c) Registration of the images by the similarity
transformation. The original images are courtesy of NASA.
transformation. The original images are courtesy of NASA.
To obtain a license for this registration software, follow this link =>
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| Automatic similarity registration |
| Image Registration and Fusion Systems |
(a)
(b)
(c)
