Hong Kong Archivists Repair Thousands of Corrupted Images on Government Sites

Hong Kong's largest public-facing digital repositories are midway through urgent remediation work this week, after a systemic problem with duplicate and broken image files surfaced across several government and institutional platforms, disrupting access to historical visual records that tens of thousands of users consult monthly.

The issue, which archivists have described in technical documentation circulated among institutions, involves files that were uploaded more than once under different metadata tags, a legacy of uncoordinated digitisation drives carried out between 2014 and 2021. When server-side scripts attempt to resolve which version to display, a significant share of the duplicates trigger null returns, producing the blank placeholder boxes that users now encounter on sites including the Hong Kong Public Libraries digital collection and several pages within the Government Records Service portal hosted on the Queensway Government Offices campus.

Why This Week Became a Reckoning

Pressure to act intensified after the Hong Kong Museum of History flagged the problem at a closed working session of the inter-institutional Digital Preservation Taskforce on June 30. That body, which includes representatives from the University of Hong Kong Libraries in Pokfulam and the Hong Kong Baptist University Library on Baptist University Road in Kowloon Tong, circulated a joint technical memo on July 2 calling for a standardised deduplication protocol to be adopted before the end of the third quarter of 2026.

The timing is not incidental. The city has been accelerating digitisation as part of the broader Greater Bay Area data infrastructure push, and Hong Kong's ambition to position itself as a regional digital-asset hub means that sloppy image management carries real reputational cost, particularly as Singapore's National Archives completed its own deduplication overhaul in late 2024, setting a benchmark that procurement officials in Hong Kong have been quietly citing in budget justifications.

For local news organisations, the stakes are equally concrete. The South China Morning Post's digital archive, which stretches back to 1903 and was partially digitised in a phased programme beginning in 2018, has experienced isolated but publicly visible image-rendering failures on article pages from the 2005-2012 period. Editors have been routing those pages through a manual replacement queue since Monday, July 1, according to a workflow update visible in the publication's public-facing corrections log.

What the Technical Fix Actually Involves

Deduplication at this scale is neither quick nor cheap. Industry benchmarks suggest that a corpus of around two million image files, roughly the size of the Government Records Service's digitised holdings, requires between four and six weeks of automated hashing work followed by manual verification of flagged edge cases, at a per-file cost that can run to several Hong Kong dollars when staff time is factored in. The total bill for a project of that scope could exceed HK$3 million depending on whether institutions rely on in-house staff or contract out to specialist vendors operating from the Cyberport campus in Pok Fu Lam or the Science Park in Pak Shek Kok.

The core technical approach now being standardised across participating institutions uses perceptual hashing, a technique that compares visual content rather than file names, to catch duplicates that slipped through earlier keyword-based checks. Once a canonical version is identified, redirect rules are written at the server level so that old URLs pointing to deprecated copies automatically serve the correct image without breaking existing hyperlinks embedded in third-party sites or academic citations.

For researchers and members of the public who rely on these archives, particularly the Hong Kong Studies collections at the Central Library on Causeway Road, the practical advice for now is straightforward: where an image fails to load, the underlying metadata record is almost certainly intact and searchable, and reference staff at the library's Local Studies department can retrieve physical or high-resolution digital copies on request. Most affected records are expected to display correctly again by late August 2026, once the automated deduplication pass is complete and the manual review backlog is cleared.

Institutions that have not yet audited their holdings for duplicate image entries are being urged by the Taskforce to begin a preliminary scan before October, when the group is scheduled to publish a city-wide standard for digital image asset management, a document that will likely become the reference point for any future digitisation contracts funded through the Innovation and Technology Bureau.