Hybrid Frame-HDR（HF-HDR） | Image Sensor for Mobile | Technology

Overview

Hybrid Frame-HDR (HF-HDR) technology uses multiple HDR functions. It delivers functionality across a wide dynamic range with the capability to significantly suppress blowout in bright areas as well as blackout in dark areas in high-contrast scenes, resulting in images that more closely resemble what the human eye actually sees.
HF-HDR can be used regardless of readout mode, including in binning mode and full mode, so it maintains its HDR functionality even while zooming, ensuring high-quality imaging even under high-contrast conditions.

Technical Features

HF-HDR combines DCG-HDR technology and multi-frame HDR technology.
It operates by first exposing a long (exposure) frame, then combining readouts at different gain settings—high conversion gain (HCG) and low conversion gain (LCG) to achieve DCG-HDR. After that, the DCG-HDR output is combined with the Very Short frames by the latter stage application processor to achieve Hybrid Frame-HDR.

Compared with DCG-HDR, the dynamic range is further extended toward the brighter side, as the Very Short exposure frames cover the high-luminance ranges.

Comparison of HDR image quality (taken with LYTIA 901)

Comparison of image quality at 2x zoom (taken with LYTIA 828)

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