A UHDTV Camera System With Multiplane Phase-Detection Autofocus

被引：0

作者：

Kikuchi K. ^{[1
]}

Funatsu R. ^{[2
]}

Nakamura T. ^{[3
]}

Tomioka K. ^{[4
]}

Yamashita T. ^{[5
]}

机构：

[1] Japan Broadcasting Corp. (NHK), Tokyo

[2] Tokyo Institute of Technology, Tokyo

[3] Advanced Television Systems Research Division, NHK STRL

[4] Kyoto University, Kyoto

[5] Kyoto Institute of Technology, Kyoto

来源：

SMPTE Motion Imaging Journal | 2023年 / 132卷 / 02期

关键词：

High-speed shooting; metal-shielded sensor; phase detection autofocus (PDAF); three-chip color imaging; UHD-2;

D O I：

10.5594/JMI.2023.3236021

中图分类号：

学科分类号：

摘要：

We propose a phase detection autofocus (PDAF) method for three-chip 8K (UHD-2) 240-frame/sec cameras that detects the in-focus position of a lens by using disparity information between pixels with different apertures across multiple sensors. This multiplane PDAF method executes pupil division in the same incident position while using simple metal-shielded pixel technology, which can achieve accurate AF and enable low-cost implementation. The proposed method implemented in a UHD-2 three-chip camera incorporating UHD-2 sensors with half-shielded phase-detection pixels into the blue and red channels demonstrated more robust disparity calculation than the conventional single-chip metal-shielded-based PDAF method. © 2002 Society of Motion Picture and Television Engineers, Inc.

引用

页码：32 / 39

页数：7

共 14 条

[1]

Ultra High Definition Television-Image Parameter Values for Program Production, (2014)

[2]

Image Parameter Values for High Dynamic Range Television for Use in Production and International Programme Exchange, (2018)

[3]

Funatsu R., Et al., 8K 240-Hz Full-Resolution High-Speed Camera and Slow-Motion Replay Server Systems, Smpte Mot. Imag. J., 128, 3, pp. 44-49, (2019)

[4]

Funatsu R., Masuda H., Nakamura S., Yamashita T., Shimamoto H., High Visibility Focus-Aid Signal for UHDTV Cameras Using a Maximum Value Filter with Sparse Noise Reduction, 2016 IEEE Int. Symp. Broadband Multimedia Syst. Broadcast., (2016)

[5]

Sliwinski P., Wachel P., A Simple Model for On-Sensor Phase-Detection Autofocusing Algorithm, J. Comput. Commun., 1, pp. 11-17, (2013)

[6]

Jang J., Yoo Y., Kim J., Paik J., Sensor-Based Auto-Focusing System Using Multi-Scale Feature Extraction and Phase Correlation Matching, Sensors, 16, pp. 5747-5762, (2015)

[7]

Yamasaki T., Nakamura T., Funatsu R., Shimamoto H., Hybrid Autofocus System by Using a Combination of the Sensor-Based Phase-Difference Detection and Focus-Aid Signal, 2018 IEEE Int. Conf. Consumer Electronics, pp. 555-556, (2018)

[8]

Kobayashi M., Et al., A Low Noise and High Sensitivity Image Sensor with Imaging and Phase-Difference Detection AF in All Pixels, 2015 Int. Image Sensor Workshop, 2018, pp. 123-128

[9]

Yokogawa S., Et al., A 4M Pixel Full-PDAF CMOS Image Sensor with 1.58μm 2X1 On-Chip Micro-Split-Lens Technology, 2015 Int. Image Sensor Workshop, 2015, pp. 1-4

[10]

Samsung Brings Enhanced Color Accuracy and Sharpness to Mobile Photos with New Isocell Plus Technology, (2018)

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