Chinese Journal of Liquid Crystals and Displays, Volume. 40, Issue 7, 1013(2025)
Measurement method and application for smoothness and image quality consistency during zoom process of visible light multi-lens camera
Fig. 1. Dedicated test chart of zoom smoothness and image quality consistency
Fig. 3. Patch coordinate and patch ROI in each frame obtained by detection of the digital patch
Fig. 4. Brightness change in zoom process of a certain multi-lens camera
Fig. 5. White balance change in zoom process of a certain multi-lens camera
Fig. 6. Actual imaging effect of two consecutive frames during zoom process of tested multi-lens camera
Fig. 7. Color rendering change in zoom process of a certain multi-lens camera
Fig. 8. Two consecutive frames with obvious red and blue inconsistency during zoom process of tested multi-lens camera
Fig. 9. Zoom smoothness curve of a certain tested multi-lens camera
Fig. 10. Tested multi-lens camera devices，from left to right：Xiaomi10Ultra，Xiaomi11Ultra，Xiaomi10Pro.
Fig. 11. Comparison of image quality consistency and zoom smoothness between mixed zoom（a）and pure digital zoom（b）of same multi-lens camera device
Table 1. Color design value of dedicated test chart
View tableView in ArticleTable 1. Color design value of dedicated test chart
色块 sRGB CIE Lab* R G B L a* b* 灰 122 122 122 50.87 -0.153 -0.27 红 175 54 60 42.10 53.38 28.19 蓝 56 61 150 28.78 14.18 -50.29 绿 70 148 73 55.26 -38.34 31.37
Table 2. Objective evaluation index of visible light multi-lens camera zoom smoothness and image quality consistency
View tableView in ArticleTable 2. Objective evaluation index of visible light multi-lens camera zoom smoothness and image quality consistency
统计项 一致性和流畅性技术要求 亮度一致性 -3≤帧间亮度差异 ≤3 白平衡一致性 灰色块帧间色差 ≤5 色彩还原一致性 红 红色块帧间色差 ≤7 绿 绿色块帧间色差 ≤7 蓝 蓝色块帧间色差 ≤7 变焦FOV跳变 单位像素表征距离的帧间差异≤15 mm 变焦卡顿 单位像素表征距离的连续不变帧数<2
Table 3. Comparison of image quality consistency and zoom smoothness between digital zoom and mixed zoom
View tableView in ArticleTable 3. Comparison of image quality consistency and zoom smoothness between digital zoom and mixed zoom
机型变焦类型 红米K40 红米K50 小米11Ultra 小米10Ultra 小米10Pro 数字 混合 数字 混合 数字 混合 数字 混合 数字 混合 结论 符合预期 符合预期 符合预期 符合预期 符合预期 亮度跳变次数 3 7 2 6 0 2 1 5 0 4 白平衡跳变次数 0 1 0 1 0 1 0 0 0 2 色彩跳变次数 0 3 1 3 0 1 0 2 0 3 流畅性卡顿次数 0 3 0 2 0 3 0 2 0 3
Table 4. Results of comparison experiment between perceptual observation and quantitative analysis
View tableView in ArticleTable 4. Results of comparison experiment between perceptual observation and quantitative analysis
视频序号 曝光不一致次数 白平衡不一致次数 色彩不一致次数 流畅性卡顿次数 匹配度/% 主观 客观 主观 客观 主观 客观 主观 客观 汇总 61 63 28 27 34 36 34 33 98.74 1 5 5 2 2 2 2 1 1 100 2 4 3 2 2 2 2 2 2 90 3 3 3 3 3 3 3 3 3 100 4 6 7 1 1 3 3 3 3 92.85 5 6 6 1 1 3 3 3 2 92.3 6 2 2 1 1 1 1 3 3 100 7 5 5 1 0 2 2 2 2 90 8 5 4 2 2 3 3 3 3 92.3 9 3 3 2 2 2 2 2 2 100 10 1 1 1 1 1 1 1 1 100 11 4 5 2 2 3 3 2 2 91.67 12 6 7 3 3 3 4 3 3 88.23 13 4 5 2 2 2 2 2 2 90.9 14 3 3 3 3 3 3 3 3 100 15 4 4 2 2 1 2 2 2 90
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Shiwen LI, Qiang LI, Yu ZHAO, Jiahai XIONG, Shilong YANG, Guodong HU, Yutong XIE. Measurement method and application for smoothness and image quality consistency during zoom process of visible light multi-lens camera[J]. Chinese Journal of Liquid Crystals and Displays, 2025, 40(7): 1013
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Received: Jan. 25, 2025
Accepted: --
Published Online: Aug. 11, 2025
The Author Email: Shiwen LI (lishiwen1@xiaomi.com)
