How Bendigo Is Tackling the Duplicate Image Problem — and How It Stacks Up Against Cities Its Own Size

Bendigo's public institutions are accelerating their programs to identify and replace duplicate digital images in their collections, after an audit completed in May 2026 found that the Bendigo Art Gallery's online catalogue contained more than 1,400 redundant or near-identical image records — some dating back to an early digitisation push in 2009 that used inconsistent file-naming conventions.

The problem sounds administrative, but the stakes are real. Duplicate images clog search results, mislead researchers, distort collection reporting figures, and — in the case of works with Aboriginal cultural heritage significance — can result in restricted images being inadvertently surfaced twice through different catalogue pathways. That last risk has given the issue unusual urgency here, given Victoria's obligations under the Aboriginal Heritage Act 2006 and the cultural sensitivity of several items held in trust by the Gallery on Pall Mall.

A Local Problem With a Global Peer Group

Bendigo sits in an instructive middle tier globally. Cities of comparable population and institutional density — Ballarat, Geelong, and internationally, Hobart's nearest overseas equivalent Launceston in Tasmania, or New Zealand's Palmerston North — have each handled duplicate image remediation differently, and with mixed results. Ballarat's Art Gallery of Ballarat completed a similar audit in late 2024 using the open-source deduplication tool imgHash, reducing its online catalogue by roughly 8 per cent. Geelong's library consortium, GCL, contracted a private vendor at a reported cost of $34,000 to clean its digital asset management system ahead of its 2025 redevelopment.

Bendigo has taken a different path. The Bendigo Art Gallery, working alongside La Trobe University's Bendigo campus on Bendigo's Edwards Road precinct, opted to develop an in-house workflow using staff from La Trobe's Information Studies program. The collaboration, formalised through a Memorandum of Understanding signed in March 2026, means students receive accredited project hours while the Gallery gets the labour at significantly reduced cost — a model that has drawn interest from the Museums Australia Victoria network.

Internationally, the comparison is pointed. Bologna, Italy — population roughly 400,000, close to Bendigo's regional catchment — spent €120,000 on a commercial platform to clean the Museo Civico Medievale's digital records in 2023. Bendigo's current estimated outlay sits at approximately $18,000 in staff time and software licences, though Gallery administration has cautioned that figure could rise if the audit uncovers problems in the photographic collection stored off-site at the facility on Holmes Road.

What the Data Reveals — and What Comes Next

The May audit covered 22,600 catalogue records. Of the 1,400-plus duplicates flagged, around 340 were exact pixel-for-pixel copies, while the remainder were near-duplicates — different scans of the same physical object, or images cropped or colour-corrected differently by successive staff members over 17 years. About 60 records involve works with identified connections to the Dja Dja Wurrung community, and those are being reviewed separately in consultation with the Dja Dja Wurrung Clans Aboriginal Corporation before any deletion or replacement occurs.

Bendigo Health, which maintains its own image archive for patient education materials and infrastructure documentation related to its $630 million capital works program, confirmed this week it is conducting a parallel review after discovering cross-linked duplicates in its document management system. That review is expected to conclude by September 2026.

For residents and researchers, the practical advice is straightforward: if you're accessing the Bendigo Art Gallery's online collection through its website between now and the end of August, some records may temporarily disappear or show amended metadata as the cleaning process runs. Staff at the View Street entrance can assist with specific collection queries in the meantime. The La Trobe University Library on Edwards Road has also updated its interlibrary loan protocols to flag potentially duplicated image requests, effective from July 1.

The Gallery has said it expects the cleaned catalogue to go live by mid-October. If the La Trobe collaboration holds up, it may well become the template other regional Victorian institutions adopt — not because Bendigo planned it that way, but because necessity and proximity to a university campus made the solution obvious.