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PHASE CORRELATION METHOD FOR THE ALIGNMENT OF TOTAL SOLAR ECLIPSE IMAGES

2009; IOP Publishing; Volume: 706; Issue: 2 Linguagem: Inglês

10.1088/0004-637x/706/2/1605

1538-4357

Miloslav Druckmüller,

Solar Radiation and Photovoltaics

A modified phase correlation method, based on Fourier transform, which enables the alignment of solar coronal images taken during the total solar eclipses, is presented. The method enables the measurement of translation, rotation, and scaling factor between two images. With the application of this technique, pairs of images with different exposure times, different brightness scale, such as linear for CCD and nonlinear for images taken with photographic film, and even images from different emission lines can be aligned with sub-pixel precision.