The Numbers Behind Melbourne's Duplicate Image Problem: What the Data Actually Shows

Melbourne's cultural institutions, government agencies and independent creative studios are sitting on hundreds of thousands of duplicate image files, and the cost of storing, managing and misidentifying them is measurable, growing and largely unaddressed. A pattern emerging across the sector points to a problem that has quietly ballooned alongside the city's push to digitise public records, expand its arts archives and modernise planning departments dealing with housing density reform.

Duplicate image replacement — the process of identifying redundant visual assets, retiring the originals and substituting clean, catalogued versions — sits at the intersection of digital infrastructure and institutional efficiency. It sounds mundane. The numbers attached to it are not.

What the Storage Data Reveals

Digital asset management specialists working across the cultural sector estimate that between 30 and 40 percent of images held in unmanaged institutional repositories are functional duplicates — same image, different filename, different folder, sometimes different resolution. For a mid-sized organisation holding 500,000 image assets, that translates to potentially 200,000 files consuming server space and complicating search and retrieval without adding any informational value. At typical enterprise cloud storage rates that hovered around AUD $0.023 per gigabyte per month as of mid-2026, a library holding even 2 terabytes of redundant image data is spending roughly $550 a year on nothing.

Scale that to a major institution and the figure compounds quickly. The State Library of Victoria on Swanston Street, which has been actively digitising its photographic and newspaper collections for over a decade, holds millions of digital assets. The City of Melbourne's own digital records unit, operating from Council House 2 on Little Collins Street, manages planning imagery, event photography and urban documentation that accumulates with every new development application lodged under the government's housing density reforms. Neither institution has publicly disclosed its specific duplicate rate, but both have invested in digital asset management platforms in recent years — a sign the sector recognises the problem exists.

The issue gained sharper focus after a 2024 audit framework released by the Victorian Government's Department of Government Services flagged redundant digital assets as a category of avoidable ongoing expenditure in public agencies. That document, released in late 2024, encouraged agencies to run periodic deduplication reviews as part of broader ICT cost-reduction strategies.

Why Replacement Matters Beyond Cost

The financial argument is only part of the picture. In Melbourne's creative sector — particularly among the production companies and post-production houses clustered around Cremorne and South Melbourne — duplicate images create legal and attribution problems that can delay project delivery. A single campaign shoot might generate 4,000 raw files. After culling, editing and client delivery, the same image can exist in six or seven versions across shared drives, cloud backups and email attachments. When a client returns 18 months later requesting the original unedited file, retrieval becomes a labour-intensive process billed by the hour.

RMIT University's Digital Media program, based at the city campus on Swanston Street, has incorporated digital asset hygiene — including structured deduplication workflows — into its postgraduate curriculum since 2023. The program reflects industry demand: employers in the creative and public sectors increasingly list asset management proficiency alongside software skills in job listings for roles paying between $75,000 and $95,000 annually at the mid-career level.

Photographic archives tied to Melbourne's migrant community organisations present a separate dimension. Groups based in Footscray and Springvale holding decades of community event photography often operate without dedicated digital staff, meaning duplicate images accumulate across donated hard drives and USB sticks with no systematic review. Several of these organisations have approached the Public Record Office Victoria about digitisation support grants available under the Community Heritage program.

The practical path forward involves three steps most digital managers agree on: running automated hash-comparison tools to flag exact duplicates, applying perceptual hashing algorithms to catch near-duplicates across different resolutions or crops, and establishing a master asset register before any deletion occurs. Free tools including dupeGuru handle basic tasks; enterprise platforms like Bynder or Canto, used by larger Melbourne institutions, automate the process at scale. The upfront audit cost — typically between $5,000 and $20,000 for a mid-sized organisation depending on volume — tends to pay back within two annual storage cycles. The harder work is cultural: convincing teams that deleting a file is not the same as losing it.