Rebuttal material of [SDiD：Shared diffusion prior for efficient distributed stereo image compression]

Performance Comparison of SDiD on Images with Different Resolutions

512×512 resolution

We downsample the data from InStereo2K using bilinear interpolation as the sampling mode.

Table.1

Method	Bpp	Lpips	Dists
LDMIC	0.063	0.240	0.188
LDMIC	0.100	0.198	0.161
CAMSIC	0.064	0.251	0.204
CAMSIC	0.094	0.213	0.179
RDEIC	0.032	0.221	0.142
RDEIC	0.059	0.179	0.127
Ours	0.023	0.129	0.090
Ours	0.035	0.119	0.077

256×256 resolution

We downsample the data from InStereo2K using bilinear interpolation as the sampling mode.

Table.2

Method	Bpp	Lpips	Dists
LDMIC	0.089	0.306	0.235
LDMIC	0.145	0.258	0.209
CAMSIC	0.101	0.294	0.239
CAMSIC	0.153	0.240	0.210
RDEIC	0.039	0.263	0.181
RDEIC	0.068	0.195	0.166
Ours	0.032	0.188	0.127
Ours	0.046	0.165	0.102

Parameter and Computational Cost Comparison Between SDiD and Baselines

In the table below, we compare the computational complexity (FLOPs) and the number of parameters of each method, with statistics reported separately for the encoder and decoder of each model. When calculating FLOPs, we set the resolution of the input image to 832×1024.

Table.3

	Ldmic	Camsic	MS-ILLM	Perco	DiffEIC	RDEIC	SDiD
Enc_Flop	194.1G	873.3G	72.5G	541.3G	535.7G	529.8G	346.3G
Enc_parm	11.2M	28.6M	13.2M	39.9M	42.3M	39.1M	26.3M
Dec_Flop	925.9M	853.8M	1048.7G	>1.3T	>1.4T	>1.3T	8671.1G
Dec_parm	7.6M	28.6M	168.3M	3892.1M	3468.5M	3468.3M	3523.2M

Absolute values in quantitative experiments

In this chapter, we present all data points corresponding to the RD curves in Table 4. Meanwhile, we add BCSIC and ECSIC as new baselines for comparison in accordance with the requirements of Reviewer 4ymr.

Quantitative experiments on InStereo2K

Table.4

	Bpp	PSNR	LPIPS	DISTS	MSE	5-PIXEL
Proposed	0.016	27.014	0.151	0.103	3.991	0.118
	0.0244	28.321	0.1272	0.087	2.9683	0.061
	0.0351	29.211	0.112	0.073	2.448	0.043
	0.0523	30.251	0.0946	0.0622	1.772	0.0165
DiffEIC	0.0266	25.1513	0.2898	0.174	7.9867	0.1489
	0.0562	28.1671	0.1588	0.1004	2.62	0.0339
	0.0888	30.1886	0.106	0.0738	2.001	0.0138
HiFiC	0.0734	32.4339	0.2035	0.1349	4.6781	0.2161
	0.043	31.1075	0.2448	0.1549	6.495	0.2657
	0.1314	33.7579	0.1223	0.102	3.4574	0.1201
MS-ILLM	0.0293	30.0392	0.2067	0.1314	4.9096	0.243
	0.0936	32.8996	0.0826	0.0822	3.0165	0.0869
	0.0508	31.4206	0.1284	0.1061	4.085	0.1748
Perco	0.0316	22.6063	0.2534	0.1639	9.977	0.0962
RDEIC	0.0872	28.793	0.078293817	0.0532	2.217	0.0166
	0.0322	27.4797	0.178371642	0.111	3.209	0.057
	0.059	28.4622	0.105939363	0.0722	2.8856	0.0344
LDMIC	0.0436	33.6116	0.2599	0.1691	5.143	0.1352
	0.069	34.6113	0.2177	0.1401	4.113	0.0811
	0.1184	35.9027	0.167	0.1028	2.2038	0.0251
	0.1816	36.7233	0.134	0.0833	1.831	0.0182
CAMSIC	0.0433	33.3221	0.2799	0.1969	5.671	0.0932
	0.0643	34.349	0.2486	0.1708	3.8579	0.0591
	0.0955	35.358	0.2162	0.1422	2.411	0.0283
	0.1587	36.5354	0.1568	0.1046	2.012	0.0199

Table.5

	bpp	PSNR	LPIPS	DISTS
ECSIC	0.03284	32.37	0.2951	0.2025
	0.04447	33.39	0.2644	0.1785
	0.06927	34.62	0.2261	0.1487
BiSIC	0.214693487	37.4700737	0.105598904	0.071353473

Quantitative experiments on Cityscapes

Table.6

	bpp	PSNR	LPIPS	DISTS	MSE	5-PIXEL
Proposed	0.0181	26.38	0.1661	0.0885	6.076	0.131
	0.0304	27.82	0.1372	0.0736	3.011	0.052
	0.0372	28.36	0.1181	0.0671	2.658	0.031
	0.0591	30.228	0.0902	0.0508	2.229	0.0181
DiffEIC	0.0307	24.3351	0.234	0.1312	10.3929	0.1837
	0.0544	27.3699	0.1546	0.0901	5.0174	0.0476
	0.085	29.5327	0.1073	0.0624	1.985	0.0167
HiFiC	0.0761	32.9435	0.1249	0.1122	3.935	0.1224
	0.0464	31.2929	0.1732	0.1358	4.9561	0.1739
	0.132	35.1034	0.0746	0.0763	3.6987	0.1007
MS-ILLM	0.0303	29.723	0.1585	0.108	4.988	0.1995
	0.0891	33.6508	0.072	0.0679	2.9231	0.0657
	0.0511	31.5159	0.11	0.086	3.8232	0.122
Perco	0.0317	20.5571	0.2406	0.1663	10.21	0.213
RDEIC	0.0829	28.9902	0.078579264	0.0487	2.003	0.0183
	0.0357	27.1942	0.14391532	0.0908	3.4062	0.053
	0.0571	28.2095	0.10386401	0.0658	2.3939	0.0276
LDMIC	0.0387	35.5401	0.2261	0.1846	5.344	0.116
	0.0575	37.0413	0.1829	0.1523	2.6039	0.0242
	0.0871	38.5212	0.1502	0.1273	2.311	0.0202
	0.155	40.3667	0.1073	0.0907	1.9231	0.015
CAMSIC	0.0483	37.0123	0.1988	0.1623	3.023	0.063
	0.0718	38.3795	0.1645	0.1376	2.722	0.028
	0.1077	39.7741	0.1349	0.1136	2.201	0.0185
	0.157	41.1765	0.1078	0.0921	1.8167	0.012

Table.7

	bpp	PSNR	LPIPS	DISTS
ECSIC	0.03087	33.82	0.266	0.209
	0.05073	36.18	0.1951	0.1662
	0.06404	37.2	0.168	0.1484
BiSIC	0.169781432	41.57864761	0.082280695	0.078633718