Background Color Correction Based on Coefficient Matrix

Jianguo Ran; Heng Liu; Lü Zhenjian; Suhong Wang; Zhaoyang Zeng

doi:10.3788/LOP202259.0210006

Laser & Optoelectronics Progress, Volume. 59, Issue 2, 0210006(2022)

Background Color Correction Based on Coefficient Matrix

Jianguo Ran, Heng Liu^*, Lü Zhenjian, Suhong Wang, and Zhaoyang Zeng

National Key Laboratory on Electromagnetic Environmental Effects and Electro-Optical Engineering, Army Engineering University of PLA, Jiangsu , Nanjing 210007

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Figures & Tables(6)

Fig. 1. Flow chart of coefficient matrix

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Fig. 2. Scatter diagrams of chromatic aberration obtained by four chromatic aberration formulas before and after correction. (a) CIE DE₁₉₇₆; (b) DE₁₉₉₄; (c) DE_CMC; (d) DE₂₀₀₀

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Fig. 3. Background color correction before and after comparison

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Table 1. Chromaticity values of partial color plate

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Table 1. Chromaticity values of partial color plate

No.	$L_{o i}$	$a_{o i}$	$b_{o i}$	$L_{c i}$	$a_{c i}$	$b_{c i}$
1	33.112	-8.073	3.461	29.263	3.074	7.203
2	34.258	-5.591	3.643	37.658	-13.873	-0.489
3	34.271	-3.895	3.473	39.672	-1.419	2.727
4	33.219	-3.107	-3.107	36.842	-1.026	2.904
5	33.837	-2.501	4.038	31.355	-1.445	8.83
6	33.369	-1.436	4.367	32.522	4.053	6.804
7	33.497	-0.628	4.265	30.31	-7.362	16.075
8	32.963	-0.79	4.936	31.778	2.732	6.33
9	32.869	0.297	5.329	32.416	3.609	6.639
10	32.491	0.942	5.578	26.797	12.309	10.437

Table 2. Comparison of swatch data under the same shooting conditions

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Table 2. Comparison of swatch data under the same shooting conditions

No.	Real value			Shooting value			Value after correction
No.	L	a	b	L	a	b	L	a	b
1	44.446	-5.906	27.879	45.451	-8.176	40.210	42.620	-4.210	23.729
2	44.450	-4.068	27.310	52.860	-7.336	47.134	44.603	-3.183	26.707
3	43.884	-1.727	25.135	45.751	-2.421	34.953	41.052	-1.786	20.362
4	43.703	-1.284	25.905	47.758	-2.932	43.890	47.758	-1.432	25.232
5	43.620	0.455	24.319	51.076	2.120	28.925	39.725	0.357	23.007
6	42.906	1.864	25.079	48.617	4.636	42.568	42.452	2.106	23.931
7	42.335	2.566	24.591	48.366	3.489	44.023	42.843	1.642	24.857
8	42.583	3.242	23.695	48.817	5.956	33.273	40.283	2.177	18.537

Table 3. Comparison of average chromatic aberration data before and after correction
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Table 3. Comparison of average chromatic aberration data before and after correction
Color classification Average color before correction Average color after correction
DE₁₉₇₆ 15.316 3.298
DE₁₉₉₄ 8.624 2.272
DE_CMC 9.465 2.495
DE₂₀₀₀ 7.799 2.292

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Jianguo Ran, Heng Liu, Lü Zhenjian, Suhong Wang, Zhaoyang Zeng. Background Color Correction Based on Coefficient Matrix[J]. Laser & Optoelectronics Progress, 2022, 59(2): 0210006

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