Abstract
Light can leak into an image sensor from the edge of the chassis openings that accommodate cameras in mobile devices. This adversely affects camera performance. This disclosure describes software-based techniques to mitigate light leakage in mobile device cameras. The techniques can combat environmental light leakage as well as self-emissive leakage from displays. A dynamic perceptual fidelity restoration (DPFR) algorithm drives the display screen by adapting to the displayed content while simultaneously reducing the light reflected toward the camera. The content in the portion of the display screen surrounding the hole in active area (HIAA) is adjusted such that pixels within an n-pixel distance from the HIAA have their gray levels lowered. The total light intensity in this area is reduced while the visual quality is preserved. The techniques perform particularly well in low-light environments by improving sensor accuracy and by mitigating abrupt brightness fluctuations. The impact of light leakage is mitigated entirely via software, with no changes to device hardware.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Li, Hsin-Hsueh; Wen, Chien-Hui; and Foo, Ken, "Dynamic Perceptual Fidelity Restoration for Combating Light Leakage in Cameras and Under-Display Sensors", Technical Disclosure Commons, (December 22, 2025)
https://www.tdcommons.org/dpubs_series/9077