Hong Kong's War on Duplicate Images: What Officials, Experts and Industry Figures Are Say

Hong Kong's digital content managers are facing mounting pressure to clean up image libraries bloated with duplicates, with government agencies, university libraries and private technology firms all grappling with the same underlying problem: vast repositories of photos, icons and archival scans that have been uploaded, re-uploaded and mis-tagged across disconnected systems for years.

The issue has sharpened focus among technology officers at several institutions this year. The Hong Kong Public Libraries network, which operates 74 branch locations across the territory including flagship sites at City Hall in Central and Sha Tin's New Town Plaza complex, has been conducting an internal audit of its digitised collection since early 2026. The audit is examining tens of thousands of scanned documents and photographs for redundant files that inflate storage costs and degrade search accuracy.

Why This Matters Now

Storage is not cheap in Hong Kong. Commercial cloud pricing from providers serving enterprise clients in the city typically ranges from HK$0.20 to HK$0.45 per gigabyte per month depending on redundancy tiers, according to pricing schedules published by several regional data centre operators. For institutions holding collections measured in terabytes, duplicate imagery quietly compounds that bill every billing cycle.

Beyond cost, the problem affects discoverability. When a user searches a government portal or academic database and retrieves the same image under three different filenames with inconsistent metadata, trust in the system erodes. The Office of the Government Chief Information Officer, which sets digital standards for bureaus across Admiralty and beyond, published updated data governance guidelines in March 2026 that specifically addressed file deduplication as a component of responsible data management. The guidelines do not carry enforcement powers but set a benchmark that agencies are expected to follow during system upgrades.

The Hong Kong Science and Technology Parks Corporation, headquartered in Pak Shek Kok in the New Territories, has been running a smart-city data tools programme that includes image-processing utilities for tenant companies. Several startups in its Incu-Tech scheme have built deduplication pipelines using perceptual hashing — a technique that identifies visually identical or near-identical images even when file sizes or compression levels differ. Industry practitioners at a Cyberport-hosted forum in May 2026 described perceptual hashing as now mature enough for production environments handling millions of files.

What Experts Are Recommending

Specialists in digital asset management point to three practical steps: audit before migration, hash before ingest, and establish a single canonical record at the point of upload rather than trying to clean up downstream. Those principles appear repeatedly in guidance documents circulated within the city's library science and archiving community, including materials distributed at a workshop held at the University of Hong Kong's Main Library on Bonham Road in Pokfulam earlier this year.

The commercial sector faces its own version of the challenge. E-commerce operators based in Kwun Tong's industrial loft district — where many of the city's mid-size online retailers cluster — routinely deal with product catalogues where a single item appears under dozens of slightly cropped or recoloured thumbnail variants. Platform operators have told trade groups that manual review is no longer viable at scale, pushing demand toward automated detection tools.

The practical path forward appears to rest on policy alignment rather than technology alone. Institutions waiting for a single authoritative tool to solve the problem are likely to be disappointed; the more successful approaches documented so far combine automated flagging with human-reviewed disposition workflows. The OGCIO guidelines recommend that agencies complete initial deduplication assessments by the end of the 2026-27 financial year, which ends in March 2027. Organisations that have not yet begun that process are already behind the timeline those guidelines imply.