Abstract
Abstract. This work presents a novel image accumulation filter technique that reveals small-scale features and details from intense luminosity or high dynamic range (HDR) video recordings. It was discovered and developed from the analyses of the Norwegian Broadcasting Corporation (NRK) film of the total solar eclipse that occurred Friday 20 March 2015 in Longyearbyen (78° N, 15° E) on Svalbard, Norway. The result of the filter is fused with a HDR image of the corona and the Solar Dynamic Observatory (SDO) image of the solar disk.
Highlights
Stacking or accumulating camera frames is a well-known technique in astrophysics
The result of the filter is fused with a high dynamic range (HDR) image of the corona and the Solar Dynamic Observatory (SDO) image of the solar disk
It should be noted that our technique could be improved by applying a Fourier transform-based low-pass filter to reduce sharp intensity edge effects
Summary
Stacking or accumulating camera frames is a well-known technique in astrophysics (see Berry and Burnell, 2005). The track-and-stack technique is an effective method to obtain long exposures from many short ones of faint deep-sky objects while tracking. An inexpensive web camera sensor is capable of capturing a large number of faint and noisy exposures that can be stacked into sharp and clear images of deep-sky objects. Is widely used to align, stack, and process astronomical images Another benefit of high frame rate and short exposures is that it can be used to minimize atmospheric effects such as seeing (Law et al, 2006; Baldwin et al, 2008)
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