激光投影电视中图像细节层次感的恰可察觉差 
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Just-Noticeable Difference of Image Contour Rendering for a Laser Projection Television
东南大学电子科学与工程学院教育部信息显示与可视化国际合作联合实验室, 江苏 南京 210096
图 & 表
图 1. 实验界面示意图
Fig. 1. Schematic diagram of experimental interface
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图 2. CR的JND实验测试图片。(a)气球;(b)花车;(c)孩子;(d)植物;(e)穹顶;(f)鹦鹉;(g)兔子;(h)房子;(i)积木
Fig. 2. Test images of JND for CR. (a) Balloon; (b) carriage; (c) children; (d) plant; (e) globe; (f) parrot; (g) rabbit; (h) house; (i) toy block
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图 3. “一上二下”阶梯法示意图。最后6个标星的拐点用来计算JND
Fig. 3. Illustration of the staircase method of 1 up 2 down. The last 6 reversals indicated as stars were used for JND calculation
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图 4. 9张图片的细节层次感的JND剔除异常值之后的箱形图。(a) 1个JND(原始数据);(b) 1个JND;(c) 2个JND;(d) 3个JND;(e) 4个JND
Fig. 4. Box-plots of JND of contour rendering for nine pictures after excluding outliers. (a) One JND (original data); (b) One JND; (c) two JND; (d) three JND; (e) four JND
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图 5. DLP XPR技术示意图
Fig. 5. Schematic diagram of DLP XPR technology
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图 6. 宽度为5 pixel、间隔为5 pixel的条纹。(a)原始图片;(b)照片
Fig. 6. Stripes with width of five pixel and spacing of five pixel. (a) Original image; (b) photo
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图 7. 宽度为5 pixel、间隔为5 pixel的条纹的归一化亮度分布
Fig. 7. Normalized luminance distribution of stripes with width of five pixel and spacing of five pixel
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图 8. 1 pixel条纹扩展模拟
Fig. 8. Simulation of the extension of a stripe with width of one pixel
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表 1细节层次感的JND回归分析
Table1. Regression analysis for JND of contour rendering
| Number of JND | Adjusted R-square | Variable | Coefficient | T-statistic | Sig. |
|---|
| 1 | 0.337 | Constant | -1.265 | -1.383 | 0.209 | | COR | 2.199 | 2.250 | 0.059 | | 2 | 0.358 | Constant | 0.893 | 7.761 | 0.000 | | ASM | 13.990 | 2.336 | 0.052 | | 3 | 0.551 | Constant | 1.086 | 8.632 | 0.000 | | ASM | 21.531 | 3.288 | 0.013 | | 4 | 0.554 | Constant | 1.262 | 7.950 | 0.000 | | ASM | 27.301 | 3.305 | 0.013 |
|
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表 2液晶电视和激光投影电视的细节层次感的JND对应σ的值
Table2. JND values expressed by σ of contour rendering for LCD TV and laser projection TV
| Number of JND | 1 | 2 | 3 | 4 |
|---|
| LCD TV | 0.50 | 0.80 | 1.14 | 1.47 | | Laser projection TV | 0.81 | 1.11 | 1.42 | 1.68 |
|
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表 3液晶电视和激光投影电视细节层次感的JND对应σ的差值及平均值
Table3. Differences and mean values of JND values expressed by σ of contour rendering for LCD TV and laser projection TV
| Number of JND | 2JND-1JND | 3JND-2JND | 4JND-3JND | Mean value |
|---|
| LCD TV | 0.30 | 0.34 | 0.33 | 0.32 | | Laser projection TV | 0.30 | 0.31 | 0.26 | 0.29 |
|
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王飞霞, 王俊轶, 李晓华, 王坚, 刘皓天, 屠彦. 激光投影电视中图像细节层次感的恰可察觉差[J]. 光学学报, 2020, 40(5): 0533001. Feixia Wang, Junyi Wang, Xiaohua Li, Jian Wang, Haotian Liu, Yan Tu. Just-Noticeable Difference of Image Contour Rendering for a Laser Projection Television[J]. Acta Optica Sinica, 2020, 40(5): 0533001.
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