Fig. 5: Evaluation of ITI translations of SDO/HMI continuum observations using simultaneous observations of SDO/HMI and Hinode/BFI continuum from 2013-11-18 17:46:20 and 2013-11-18 17:46:28, respectively.
From: A deep learning framework for instrument-to-instrument translation of solar observation data
a Original HMI (top left) and ITI enhanced (bottom right) full-disk observation. b Comparison of a 222″ × 222″ region and corresponding Hinode/BFI observation with full field-of-view and resolution. c Matched features of the original HMI, ITI enhanced and Hinode/BFI observation with 13″ × 13″ spatial extent. The penumbral features of ITI match the real observation. The small scale separation of the individual fibrils is beyond the resolution limit of HMI, but are largely reconstructed in the ITI observation. The coarse shape of the granulation pattern and the solar pore match the Hinode/BFI observation, while smaller intergranular lanes show deviations. d Example of the comparison between ITI and the deconvolution approach (2014-12-19 22:33). We show the original HMI image, the enhanced images and the absolute error maps to the original Hinode/BFI image. The ITI image shows a better agreement with the high-resolution reference, as can be seen from the reduced errors in the penumbra and sharper boundaries of the pores. An animation of the temporal evaluation from 2014-11-22 is provided in Supplementary Movies 1 and 2.
