One of my wedding photos

Chia-Kai Liang


liangck at gmail dot com

About Me

I am a software engineer at Google, focusing on mobile computational photography. I obtained my BS degree in 2004 and defended my PhD dissertation in 2008, both at National Taiwan University. My research interests include computational photography, image/video processing, computer vision, and hardware architecture: basically anything that records, reads, modifies, writes, or displays the pixel, voxel, or ray-el values.

See my Curriculum Vitae and Google Scholar profile about my professional work.

By-products of Picture Revolution at Google

Fusion Sample

Efficient Hybrid Zoom using Camera Fusion on Mobile Phones

Xiaotong Wu, Wei-Sheng Lai, YiChang Shih, Charles Herrmann, Michael Krainin, Deqing Sun, and Chia-Kai Liang

ACM Trans. Graphics (Proc. SIGGRAPH Asia) 2023.

[webpage] [pdf]

Fusion Sample

Face Deblurring using Dual Camera Fusion on Mobile Phones

Wei-Sheng Lai, YiChang Shih, Lun-Cheng Chu, Xiaotong Wu, Sung-Fang Tsai, Michael Krainin, Deqing Sun, and Chia-Kai Liang

ACM Trans. Graphics (Proc. SIGGRAPH) 2022.

[webpage] [pdf]

Face Rectification Sample

Correcting Face Distortion in Wide-Angle Videos

Wei-Sheng Lai, Yichang Shih, Chia-Kai Liang, and Ming-Hsuan Yang


[webpage] [pdf] [video]

Deep Online Fused Video Stabilization

Zhenmei Shi, Fuhao Shi, Wei-Sheng Lai, Chia-Kai Liang, and Yingyu Liang

WACV 2022

[webpage] [pdf] [video]

Portrait Nerf Sample Portrait Nerf Sample

Portrait Neural Radiance Fields from a Single Image

Chen Gao, Yichang Shih, Wei-Sheng Lai, Chia-Kai Liang, and Jia-Bin Huang


[webpage] [pdf]

Face Stabilization Sample

Steadiface: Real-Time Face-Centric Stabilization on Mobile Phones

Fuhao Shi, Sung-Fang Tsai, Youyou Wang, and Chia-Kai Liang

Proc. IEEE ICIP 2019

[webpage] [pdf] [video]

Distortion Correction Sample

Distortion-Free Wide-Angle Portraits on Camera Phones

Yichang Shih, Wei-Sheng Lai, and Chia-Kai Liang

ACM Trans. Graphics (Proc. SIGGRAPH) 2019.

[webpage] [pdf] [video]

Super-resolution Sample

Handheld Multi-frame Super-resolution

Bartlomiej Wronski, Ignacio Garcia-Dorado, Manfred Ernst, Damien Kelly, Michael Krainin, Chia-Kai Liang, Marc Levoy, and Peyman Milanfar

ACM Trans. Graphics (Proc. SIGGRAPH) 2019.

[webpage] [pdf] [video]

Video Denoising Sample

Real-Time Video Denoising on Mobile Phones

Jana Ehmann, Lun-Cheng Chu, Sung-Fang Tsai, and Chia-Kai Liang

Proc. IEEE ICIP 2018


Fused Video Stabilization on the Pixel 2 and Pixel 2 XL

Chia-Kai Liang and Fuhao Shi

Google Research Blog


By-products of Picture Revolution at Lytro

Improve Light Field Thumbnail

Improving Light Field Camera Sample Design With Irregularity and Aberration

Li-Yi Wei, Chia-Kai Liang, Graham Myhre, Colvin Pitts and Kurt Akeley

ACM Trans. Graphics (Proc. SIGGRAPH) 2015

[webpage] [full version] [video 1 (youtube) (vimeo)] [video 2 (vimeo)]
Light Rield Res Thumbnail

A Light Transport Framework for Lenslet Light Field Cameras

Chia-Kai Liang and Ravi Ramamoorthi

ACM Trans. Graphics 2015

[pdf] [supplemental material] [slide(.pptx)]

Stereoscopic Image Editing

Stereo Retarget Thumbnail

Content-Aware Display Adaptation and Interactive Editing for Stereoscopic Images

Che-Han Chang, Chia-Kai Liang, and Yung-Yu Chuang

IEEE Trans. Multimedia 2011

Stereo Media Processing Thumbnail

3D Cinematography Principles and Their Applications to Stereoscopic Media Processing

Chun-Wei Liu, Tz-Huan Huang, Ming-Hsu Chang, Ken-Yi Lee, Chia-Kai Liang, and Yung-Yu Chuang

ACM Multimedia 2011


Touch tone thumbnail

Mobile Image Editing

TouchTone: Interactive Local Image Adjustment Using Point-and-Swipe

Chia-Kai Liang, Wei-Chao Chen, and Natasha Gelfand

Computer Graphics Forum (Proc. Eurographics) 2010



Mobile Panorama

Panoramic Imaging System for Camera Phones

Kari Pulli, Chia-Kai Liang, Marius Tico, Xianglin Wang, and Yingen Xiong

Proc. IEEE ICCE 2010

Available in Nokia N86 and upcoming ones. You may like to see my own photos and user results 1, 2, 3, 4, 5, and 6.

Automatic Tage Annotation for Landmarks

Social Media for Recognition

Learning Landmarks by Exploiting Social Media

Chia-Kai Liang, Yu-Ting Hsieh, Tien-Jung Chuang, Yin Wang, Ming-Fang Weng, and Yung-Yu Chuang

Proc. MMM 2010


Hardware-Efficient Belief Propagation

Hardware-Efficient Belief Propagation

Hardware Efficient Belief Propagation

Chia-Kai Liang, Chao-Chung Cheng, Yen-Chieh Lai, Liang-Gee Chen, Homer Chen

IEEE Trans. CSVT 2011

Proc. IEEE CVPR 2009


Fast Belief Propagation Process Element for High-Quality Stereo Estimation

Chao-Chung Cheng, Chia-Kai Liang, Yen-Chieh Lai, Liang-Gee Chen, Homer Chen

Proc. ICASSP 2009

Light Field Analysis, Acquisition, and Processing


Analysis, Acquisition, and Processing of Light Field for Computational Photography

Chia-Kai Liang, PhD Dissertation, 2009

2009 IICM Best PhD Dissertation Award

IPPR Best PhD Dissertation Award

NTU GICE Best PhD Dissertation Award

[pdf (42.9MB)]
Light Field Analysis

Light Field Analysis for Modeling Image Formation

Chia-Kai Liang, YiChang Shih, Homer Chen

IEEE Trans. Imag Processing 2011

Programmable Aperture Camera

Programmable Aperture Photography: Multiplexed Light Field Acquisition

Chia-Kai Liang, Tai-Hsu Lin, Bing-Yi Wong, Chi Liu (a.k.a Gene Liu), Homer Chen

ACM Trans. Graphics (Proc. SIGGRAPH) 2008

[pdf(high res)] [pdf(low res)] [webpage]

Image Enhancement

Image Enhancement and Processing for Mobile Devices

Image Enhancement for Backlight-Scaled TFT-LCD Displays

Pei-Shan Tsai, Chia-Kai Liang, Tai-Hsiang Huang, and Homer Chen

IEEE Trans CSVT 2009

[pdf] [webpage]

Rolling Shutter

Rolling Shutter Distortion

Analysis and Compensation of Rolling Shutter Effect

Chia-Kai Liang, Li-Wen Chang, Homer Chen

IEEE Trans. Image Processing 2008


Rolling Shutter Distortion Correction

Chia-Kai Liang, Y.-C. Peng, and Homer Chen

Proc. VCIP 2005


Video Stabilization + Codec

Digital Image Stabilization

Integration of Digital Stabilizer with Video Codec for Digital Video Cameras

Homer Chen, Chia-Kai Liang, Yu-Chun Peng, Huang-An Chang.

IEEE Trans. CSVT 2008

2008 IEEE Circuits and Systems Society CSVT Transactions Best Paper Award



Digital Rights Management

Digital Rights Management for DVB-H Mobile TV

Chia-Chu Liu, Chia-Kai Liang, K.-S. Hsu, C.-P. Kuan, Homer Chen

Proc. IPDM 2006

A Robust DRM System on the DVB Multimedia Home Platform

Chia-Kai Liang, Chia-Chu Liu, Homer Chen

Proc. CCNC 2006

Issued US patents

The latest list of issued patents and applications.

  1. 11,856,295
  2. 11,683,586
  3. 11,227,146
  4. 11,190,689
  5. 11,132,800
  6. 11,102,413
  7. 11,064,119
  8. 10,897,608
  9. 10,812,717
  10. 10,552,947
  11. 10,547,790
  12. 10,531,082
  13. 10,462,370
  14. 10,205,896
  15. 10,200,613
  16. 10,171,738
  17. 10,129,524
  18. 10,038,909
  19. 10,033,986
  20. 9,979,909
  21. 9,888,179
  22. 9,858,649
  23. 9,712,820
  24. 9,628,684
  25. 9,607,424
  26. 9,444,991
  27. 9,420,276
  28. 9,414,087
  29. 9,392,153
  30. 9,386,288
  31. 9,172,853
  32. 9,001,226
  33. 8,997,021
  34. 8,888,317
  35. 8,971,625
  36. 8,948,545
  37. 8,831,377
  38. 8,811,769
  39. 8,780,134
  40. 8,761,491
  41. 8,406,563
  42. 8,373,721
  43. 8,249,369
  44. 8,026,935
  45. 7,956,898


Some of my course projects can be found here.

Blog for the course AMMAI

Last update: Apr 2024

Chia-Kai Liang