Fast colorization based image coding algorithm using multiple resolution images

Uruma, Kazunori; Konishi, Katsumi; Takahashi, Tomohiro; Furukawa, Toshihiro

doi:10.1186/s13640-016-0107-8

EURASIP Journal on Image and Video Processing

Table 2 Numerical results for several (N,K)s

From: Fast colorization based image coding algorithm using multiple resolution images

Milkdrop	N	N-K				Airplane	N	N-K
		0	1	2	3			0	1	2	3
PSNR [dB]	4	38.0759	37.5711	37.1943	34.3947	PSNR [dB]	4	38.2035	33.2393	32.3945	32.0054
	5	37.6920	37.2186	36.8684	34.2402		5	38.1185	33.2027	32.3641	31.9780
	6	37.6314	37.1643	36.8181	34.2058		6	37.7937	33.1094	32.2888	31.9157
	7	37.6244	37.1576	36.8116	34.2006		7	37.7754	33.1061	32.2874	31.9159
Encoding Time [s]	4	14.1671	2.3608	0.6417	0.2239	Encoding Time [s]	4	14.6127	2.3328	0.6553	0.2307
	5	13.9903	2.4329	0.7173	0.2841		5	14.3815	2.3910	0.7077	0.2871
	6	13.9673	2.4428	0.7311	0.3021		6	14.6817	2.4039	0.7209	0.3002
	7	14.0246	2.4431	0.7268	0.3098		7	14.7841	2.4064	0.7275	0.3042
Decoding Time [s]	4	0.2144	0.2189	0.2122	0.2170	Decoding Time [s]	4	0.2099	0.2111	0.2033	0.1969
	5	0.2137	0.1979	0.2156	0.1996		5	0.2240	0.1994	0.2011	0.1988
	6	0.2382	0.2101	0.2075	0.1974		6	0.2193	0.2040	0.2087	0.2146
	7	0.2242	0.2021	0.2336	0.2136		7	0.2181	0.1986	0.2042	0.2231
Volume [byte]	4	1407	1146	913	702	Volume [byte]	4	1411	1148	915	706
	5	1193	933	699	488		5	1197	935	702	492
	6	1195	933	700	489		6	1154	892	659	449
	7	1193	932	699	488		7	1149	886	653	444
Boat	N	N-K				Couple	N	N-K
		0	1	2	3			0	1	2	3
PSNR [dB]	4	34.2850	33.9851	33.6053	32.5525	PSNR [dB]	4	38.5062	38.2618	37.9755	37.0003
	5	34.0394	33.7643	33.4117	32.4187		5	38.3833	38.1462	37.8793	36.9063
	6	34.0133	33.7336	33.3841	32.3973		6	38.3118	38.0789	37.8241	36.8307
	7	34.0132	33.7335	33.3840	32.3969		7	38.3085	38.0757	37.8214	36.8280
Encoding Time [s]	4	14.117	2.3290	0.6535	0.2281	Encoding Time [s]	4	14.7000	2.3234	0.6541	0.2365
	5	14.1622	2.4299	0.7107	0.2882		5	14.3138	2.3749	0.7144	0.2868
	6	14.2034	2.4091	0.7348	0.3129		6	14.3077	2.3927	0.7312	0.3089
	7	14.0931	2.4581	0.7512	0.3148		7	14.4525	2.4048	0.7412	0.3151
Decoding Time [s]	4	0.2119	0.2098	0.2359	0.1954	Decoding Time [s]	4	0.2105	0.1967	0.1976	0.2081
	5	0.2111	0.2058	0.2159	0.2064		5	0.2072	0.1983	0.1980	0.2156
	6	0.2162	0.2037	0.2016	0.1980		6	0.2075	0.2159	0.2026	0.2246
	7	0.2116	0.2069	0.2099	0.2536		7	0.2068	0.2166	0.2120	0.2006
Volume [byte]	4	1413	1150	912	702	Volume [byte]	4	1414	1154	917	705
	5	1198	936	698	487		5	1200	940	703	491
	6	1195	933	695	484		6	1194	934	697	485
	7	1198	936	698	487		7	1191	931	694	482
Lenna	N	N-K				Earth	N	N-K
		0	1	2	3			0	1	2	3
PSNR [dB]	4	36.3927	36.2937	36.0081	35.3116	PSNR [dB]	4	38.5740	38.4291	38.1530	37.4579
	5	36.1112	36.0174	35.7481	35.1009		5	38.1631	38.0269	37.7843	37.0972
	6	36.0689	35.9747	35.7079	35.0432		6	38.0894	37.9473	37.7087	37.0341
	7	36.0716	35.9774	35.7105	35.0497		7	38.0962	37.9539	37.7153	37.0421
Encoding Time [s]	4	14.0836	2.2984	0.6657	0.2247	Encoding Time [s]	4	14.5969	2.2922	0.6481	0.2284
	5	14.1050	2.3610	0.7059	0.2838		5	14.2419	2.3374	0.7004	0.2842
	6	14.4354	2.3993	0.7309	0.3194		6	14.3422	2.3709	0.7293	0.3078
	7	14.5874	2.3534	0.7317	0.3150		7	14.1882	2.3787	0.7252	0.3131
Decoding Time [s]	4	0.2023	0.2110	0.2272	0.1950	Decoding Time [s]	4	0.2106	0.2018	0.2078	0.1997
	5	0.2278	0.2029	0.2078	0.2096		5	0.2291	0.2076	0.1970	0.2152
	6	0.2624	0.2173	0.2230	0.2273		6	0.2057	0.2124	0.1964	0.2003
	7	0.2388	0.2115	0.2162	0.1970		7	0.2082	0.2053	0.1983	0.2041
Volume [byte]	4	1420	1153	915	704	Volume [byte]	4	1402	1143	909	702
	5	1206	939	701	490		5	1188	929	695	488
	6	1200	934	696	485		6	1184	926	692	485
	7	1204	937	699	488		7	1183	924	690	484
Pepper	N	N-K
		0	1	2	3
PSNR [dB]	4	32.6169	30.3128	30.0602	29.1197
	5	32.0963	29.9893	29.7612	28.8955
	6	32.0913	29.9865	29.7585	28.8929
	7	32.0914	29.9867	29.7588	28.8932
Encoding Time [s]	4	14.7880	2.3244	0.6564	0.2304
	5	14.3656	2.3847	0.7095	0.2876
	6	14.4174	2.4086	0.7376	0.3121
	7	14.5826	2.4150	0.7427	0.3207
Decoding Time [sec]	4	0.2103	0.2026	0.1971	0.2081
	5	0.2246	0.2147	0.1985	0.2220
	6	0.2037	0.1981	0.1977	0.1986
	7	0.2061	0.2201	0.2230	0.1985
Volume [byte]	4	1412	1143	911	702
	5	1198	929	697	488
	6	1206	937	705	496
	7	1209	940	708	499

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