Chia-Kai Liang

Chia-Kai Liang 梁家愷

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.

All

Picture Revolution at Google

  • Pro Zoom

    Pixel Camera Team, Google

    Since Pixel 10 Pro (2025)

    [article]

  • Nightsight Panorama

    Pixel Camera Team, Google

    Since Pixel 9 (2024)

    [article]
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]
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

    [pdf]

  • Fused Video Stabilization on the Pixel 2 and Pixel 2 XL

    Chia-Kai Liang and Fuhao Shi

    Google Research Blog

    [webpage]

By-products of Picture Revolution at Lytro

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

    [pdf]
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

    [pdf]

Mobile Image Editing

Touch tone thumbnail

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

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

    Computer Graphics Forum (Proc. Eurographics) 2010

    [webpage]

Mobile Panorama

Panorama Product

  • 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. See my own photos and user results 1, 2, 3, 4, 5, 6.

Social Media for Recognition

Automatic Tag Annotation for Landmarks

  • 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

    [pdf]

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

    [webpage]

  • 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

NTU

  • 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

    [pdf]
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 and Processing for Mobile Devices

Image Enhancement

  • 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 Distortion

Rolling Shutter

  • Analysis and Compensation of Rolling Shutter Effect

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

    IEEE Trans. Image Processing 2008

    [preprint]

  • Rolling Shutter Distortion Correction

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

    Proc. VCIP 2005

    [exhibition]

Digital Image Stabilization

Video Stabilization + Codec

  • 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

    [pdf]

Digital Rights Management

DRM

  • 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. 12,277,800
  2. 12,167,134
  3. 12,010,440
  4. 11,856,295
  5. 11,683,586
  6. 11,227,146
  7. 11,190,689
  8. 11,132,800
  9. 11,102,413
  10. 11,064,119
  11. 10,897,608
  12. 10,812,717
  13. 10,552,947
  14. 10,547,790
  15. 10,531,082
  16. 10,462,370
  17. 10,205,896
  18. 10,200,613
  19. 10,171,738
  20. 10,129,524
  21. 10,038,909
  22. 10,033,986
  23. 9,979,909
  24. 9,888,179
  25. 9,858,649
  26. 9,712,820
  27. 9,628,684
  28. 9,607,424
  29. 9,444,991
  30. 9,420,276
  31. 9,414,087
  32. 9,392,153
  33. 9,386,288
  34. 9,172,853
  35. 9,001,226
  36. 8,997,021
  37. 8,888,317
  38. 8,971,625
  39. 8,948,545
  40. 8,831,377
  41. 8,811,769
  42. 8,780,134
  43. 8,761,491
  44. 8,406,563
  45. 8,373,721
  46. 8,249,369
  47. 8,026,935
  48. 7,956,898