How Xiaohongshu Transforms Mobile Imaging from 'File HD' to 'Experience HD'

小红书技术REDtech · wechat · 2026-08-19

This article details Xiaohongshu's technical practices in building a full-chain high-quality imaging experience. Addressing high-spec content like HDR, 8K images, 4K video, LivePhoto, and 3DPhoto, the team established a comprehensive technical pipeline covering asset parsing, editing, cloud production, distribution, and terminal rendering.

Key technical highlights include:

Asset Parsing: Unified reading of container, encoding, pixel, color gamut, and association of composite assets.
Editing Pipeline: A unified decoding factory adapts to various formats, using color management and ToneMapping for HDR conversion, and GPU optimization to balance quality and performance.
Cloud Production: Preserves HDR gain information, generates multi-bitrate streams and multi-resolution resources, and supports depth estimation and parallax reconstruction for 3DPhoto.
Resource Distribution: Dynamically selects resources based on content specs, device capabilities, and network conditions.
Terminal Rendering: Optimizes decoding and rendering performance, supports Dolby Vision, and uses regional loading for smooth 8K image viewing on standard devices.

The article also highlights the 3DPhoto technology developed in collaboration with vivo, marking the first deployment of 3D spatial imaging in a mainstream Chinese app, solving challenges like rendering consistency, multi-device adaptation, and performance optimization.

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How Xiaohongshu Transforms Mobile Imaging from 'File HD' to 'Experience HD'

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