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Daguerreotype Registration
The daguerreotype, the first commercially viable photographic/imaging system, had a short life span beginning in 1839 and coming to a close in the late 1850s. During this period millions of daguerreotypes were made. The images recorded by daguerreotypes are generally the first of any event, people and/or place.

Figure 1
Fig. 1 Typical daguerreotypes.

The George Eastman House is home of one of the largest daguerreotype collections. The George Eastman House, under the direction of researchers Patrick Ravines and Ralph Wiegandt, has been committing resources to developing conservation techniques and understanding the causes of specimen degradation.

Part of the effort involves imaging the daguerreotypes using multiple modalities including high resolution RGB scans, the use of beam splitters to capture images with axial specular illumination, ultraviolet illuminated images, and high dynamic range imaging. The Biomedical and Materials Multimodal Imaging Laboratory at RIT has supported this research effort by developing techniques for the registration of these multimodal data sets.

Image Registration
A software tool was developed which uses a point based affine registration technique to warp one image into spatial alignment with another. Two images are presented side-by-side on a display and a researcher identifies corresponding points between them. These user-defined control point pairs provide reference points describing the displacements between two images. A transform is found which maps the points in the second image (moving image) to the first image (target image). This transform is subsequently used to interpolate the moving image to create a new image which is registered with the target image at a pixel level.

Figure 2
Fig. 2 Corresponding points on the two images are identified by the user.

Figure 3
Fig. 3 The moving image is processed to register it with the target image. The now are spatially aligned and have the same resolution.

The registration tool is available to the research community for free and can be downloaded by following the links below.
Windows Installation Package OR Mac Installation Package - Extract the archive and follow the instructions provided in instructions.pdf.
Installation Videos - Two video installation guides are available to help you get up and running.