SolarZip: An efficient and adaptive compression framework for Solar EUV imaging data - Application to Solar Orbiter/EUI data

Open Access

Table 1.

Comparison of four compressors on FSI and HRI_EUV datasets under three error bounds.

Error-bound	Compressor	FSI dataset				HRI_EUV dataset

		Comp ratio	PSNR	Coefficient	SSIM	Comp ratio	PSNR	Coefficient	SSIM
1e − 4	SPERR	44.36	91.74	1.00000	0.74	5.69	90.78	1.00000	0.99
	ZFP	33.21	100.84	1.00000	0.84	5.83	103.2	1.00000	1.00
	SZ3	42.47	89.29	1.00000	0.76	5.14	85.33	1.00000	0.99
	SZ2	45.86	90.07	1.00000	0.77	4.83	84.79	1.00000	1.00
	*SolarZip*	57.62	92.88	1.00000	0.76	5.71	90.14	1.00000	0.99

1e − 3	SPERR	151.98	77.23	0.99999	0.45	10.51	65.57	0.99997	0.96
	ZFP	63.42	82.33	0.99999	0.58	10.75	73.08	0.99999	0.99
	SZ3	149.55	73.99	0.99998	0.46	10.40	65.04	0.99997	0.96
	SZ2	142.32	74.91	0.99998	0.56	10.28	64.79	0.99996	0.96
	*SolarZip*	155.82	76.54	0.99999	0.46	11.04	69.75	0.99998	0.97

1e − 2	SPERR	660.23	61.72	0.99981	0.39	112.53	49.98	0.99928	0.39
	ZFP	221.82	68.20	0.99987	0.46	16.17	61.12	0.99993	0.816
	SZ3	685.96	57.17	0.99952	0.42	79.56	48.37	0.99869	0.38
	SZ2	560.12	57.87	0.99947	0.39	82.26	46.08	0.99897	0.35
	*SolarZip*	698.34	60.92	0.99984	0.41	115.78	57.80	0.99974	0.34

Notes. Key metrics include compression ratio (higher=better), PSNR (higher=better), correlation coefficient (1.0=perfect), and SSIM (1.0=perfect).

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