Thousands of historical images from across Ireland are being brought to life in color for the first time, thanks to a new AI-led photo project.
Combining digital technology with painstaking historical research, professors John Breslin and Sarah-Anne Buckley at the National University of Ireland, Galway, have been able to turn photos, originally shot in black in white, into rich color images.
The collection spans centuries and regions of Ireland, as well as the country’s diaspora. It includes portraits of key figures like Oscar Wilde and poet W.B. Yeats, as well as defining moments in history, like the Titanic setting sail from the Belfast shipyard where it was constructed.
A town fair in Ballybricken, County Waterford, in 1910. Credit: Courtesy of Merrion Press
Yet, some of the most compelling photos depict everyday scenes — people herding pigs, spinning wool or packed onto the back of horse-drawn carts. And while poverty is evident in pictures of barefoot villagers crowding around for a photo, or of Dublin’s working-class tenement buildings, there are also well-to-do family shots and depictions of upper-class pastimes like fox hunting.
“There were many different social classes in Ireland, as in many countries, so I think it’s important to show the full range,” said Breslin in a phone interview from Galway, on the west coast of Ireland. “We have a mixture of the wealthier classes and the gentry, and then you’ve got people who are just trying to survive and gather water and turf (peat) to burn on their fires.”
An entire section of the book is dedicated to the Irish revolutionary period, which spans from the early 1910s to 1923. This image shows Dublin’s city center in ruins following the Easter Rising of 1916. Credit: Courtesy of Merrion Press
The project began when Breslin started experimenting with old photographs of his grandparents for a personal genealogy project. After discovering an AI-powered colorization tool, DeOldify, he started applying the technique to photos from archives and libraries across Ireland.
Using a process known as deep learning, AI software can be taught how to colorize. The “training” involves analyzing thousands of normal color photos, as well as black and white versions of the same images, to help it understand which colors correlate to different shapes and textures, explained Breslin, who specializes in engineering and computer science.
Then, when the software encounters an image that only exists in black and white, it knows “what the colors should probably be,” he said. “So, for example, the grass or trees or the sea — it knows from those textures and shapes that they should be green or blue.”
Revolutionary statesman Éamon de Valera addresses a crowd in 1917. Credit: Courtesy of Merrion Press
AI has its limitations, however. There were certain idiosyncrasies to life in Ireland that the US-developed software was not trained to recognize.
“An average kind of color (of a roof), around the world, might be a terracotta, an orange or a kind of a brownish-type tile,” Breslin said. “Whereas in Ireland, the roofs were typically slate, which is gray or black.”
This is where his collaborator, Buckley, who specializes in Irish social history, came in. The pair researched everything from clothing and pigments available in Ireland at the time, to the uniforms worn by various military units, before manually changing colors and shades based on what they found.
The project also features photos of Irish people overseas, such as this 1911 image from an expedition to Antarctica. Credit: Courtesy of Merrion Press
For a photo of revolutionary politician Constance Markievicz, they even consulted passenger records from New York’s Ellis Island — where she was processed among the millions of Irish immigrants arriving in America between the 1890s and 1950s — to determine that her true eye color was blue.
But the practice is “nothing new,” Breslin said, adding that people have been colorizing photos “since the advent of photography,” albeit without the help of AI or other software like Photoshop. He also argued that his images exist in addition to, not instead of, the originals.
The eviction of farmers by their landlords — as depicted in this scene, from the village of Woodford — was the source of huge controversy in 1880s Ireland. Credit: Courtesy of Merrion Press
“We’re not vandalizing the negatives,” he said. “You can always go back and find the original photograph, and throughout the book we provide pointers to the original collection.”
“We’re being bombarded with so much information, knowledge, bite-sized media and content, so, for the younger generation particularly, it can be hard for history to compete,” Breslin said. “It’s important to be able to relate more to our history, and colorization definitely makes things more relatable.”
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