Hong Kong's War on Duplicate Images: How the City Stacks Up Against Singapore and London

Hong Kong's public and private sector organisations are quietly grappling with a problem that costs real money and erodes data trust: duplicate images embedded in government portals, property listings, hospital records and smart-city databases are multiplying faster than administrators can purge them. The issue is not cosmetic. Redundant image files slow retrieval systems, inflate cloud storage costs and — in healthcare and legal settings — risk feeding the wrong file to the wrong person at the wrong time.

The timing matters because Hong Kong is midway through a HK$168 billion digital infrastructure push tied to its Smart City Blueprint 2.0, which runs through 2025 and into 2026 planning reviews. Authorities in the Innovation and Technology Bureau have made data-quality benchmarking a stated priority, which means duplicate-image remediation has moved from the IT helpdesk to executive dashboards for the first time. The Territory's hospitals, land registries and school boards are all involved.

What Hong Kong Is Actually Doing

The Hospital Authority, which manages public hospitals from Queen Mary in Pok Fu Lam to Prince of Wales in Sha Tin, runs one of the largest medical-imaging repositories in Asia. The Authority began piloting perceptual-hash deduplication tools across its picture archiving and communication systems in late 2024. The goal was to cut redundant DICOM image files — scans that are saved twice when a system times out and a technician re-uploads — without accidentally deleting legitimate near-duplicate studies from different dates.

On the commercial side, Midland Realty and other large estate agencies operating out of offices along Des Voeux Road Central have long struggled with duplicate property photographs circulating across multiple listing platforms simultaneously. The Hong Kong Real Estate Agency Authority, which formally began licensing agents under tightened 2022 rules, has discussed image-authenticity standards but had not, as of mid-2026, issued binding technical guidance on deduplication requirements for online listings.

The Land Registry's IRIS portal, which digitised roughly 2.1 million property records, remains the clearest public benchmark. Registry administrators have acknowledged in annual service-performance reports that image-file management is an ongoing maintenance category, though they have not published a specific figure for duplicate rates. A similar pattern — action without published metrics — holds for the Education Bureau's e-Class system used by more than 900 schools.

How That Compares With Singapore and London

Singapore's Government Technology Agency, GovTech, published a data-quality framework in March 2025 that included explicit image-deduplication standards for all agencies onboarded to the Whole-of-Government Application Analytics platform. The framework set a target duplicate-image rate of below 0.5 percent by December 2025 across participating ministries. Hong Kong has no equivalent published benchmark.

London's National Health Service rolled out AI-assisted deduplication across its Picture Archiving and Communications System network beginning in January 2025, targeting an estimated 12 percent redundancy rate in legacy scan archives identified in a 2023 internal audit. The NHS programme paired deduplication with a staff-training mandate, requiring radiology departments to log and report near-miss duplicate-delivery incidents quarterly.

The gap is not simply technical. Both Singapore and London publish granular targets and track against them. Hong Kong's approach remains largely internal, with progress reported in broad terms inside annual bureau reviews rather than through public dashboards. Critics inside the local technology sector argue that without published KPIs, procurement for deduplication tools becomes opaque and vendors face little competitive pressure to demonstrate results.

For ordinary Hongkongers, the practical stakes are clearest in healthcare and housing. A duplicate scan file that triggers a second consultation wastes clinic time; a stale property photo that persists in a listing after a flat sells misleads buyers navigating an already opaque Kowloon or New Territories market. Both problems have documented equivalents in other cities — and both have proven tractable where administrators have been willing to count the problem out loud before claiming they have fixed it.

The Innovation and Technology Bureau's next Smart City Blueprint review is expected in the fourth quarter of 2026. Stakeholders in both the healthcare and property sectors say that review represents a concrete opportunity to attach measurable deduplication standards to the digital infrastructure programmes already underwritten by public funds — following the model that Singapore and London have shown can work when the political will is present.