A microscopic video of cilia in a child’s airway has sparked a controversy in Nikon’s 2026 Small World In Motion contest, with scientists alleging AI-generated elements and the organizer stating no rules were violated.
Nikon’s annual Small World In Motion competition accepts images and videos captured with high-powered microscopes and has been held every year for 15 years. Dr. Ning Xu, a researcher at Tsinghua University in China, submitted a video depicting cilia moving in a child’s airway, which won the 2026 contest. The entry, which was brightly colored and manually processed, faced scrutiny over claims that AI had altered its content. The footage featured vivid artificial coloring, a standard practice in microscopic imaging allowed by the contest, typically applied manually through staining and dyeing the specimen. Xu denied breaking rules, stating AI was used to distinguish and visualize features in the reconstructed grayscale images but not to generate the cilia or their motion.
Allegations of AI Manipulation
Nikon Photo Contest Faces Backlash Over Alleged AI Image
Edward Phelps, an associate professor at Florida University, noted that some structures in Xu’s video pop in and out of existence, while Ian Donovan, a PhD student, claimed the source image contained a distinctive watermark suggesting AI generation. These observations were echoed by two former competition judges, who raised concerns about the video’s authenticity. There's a specific set of rules in the contest, and one of them was quite clearly that you couldn't use generative AI to produce things, and the other was obviously that it has to be taken under a microscope,
Hickey said. He added that if AI had been used unfairly, it would be unfair on other entrants.
Nikon’s Response and Contest Integrity
Nikon said Xu was respectfully complying with its investigation into Xu’s entry and had received additional technical documents from him. The company maintained that at this time, we don’t see that any rules were violated. However, the controversy has reignited debates about AI’s role in scientific and artistic competitions. The Small World contest, which has celebrated microscopic photography for nearly five decades, now faces pressure to clarify its stance on emerging technologies. The Nikon Small World competition has served as a hub for scientific and artistic visual expression over almost half a century, drawing thousands of entries each year from researchers, scientists, and photography lovers globally.
Nikon Photo Contest Faces Backlash Over AI-Generated Image Entry
Unresolved Questions and Future Implications
The controversy highlights the difficulties of verifying submissions in an era of advanced AI tools. While Nikon has not yet issued a formal statement on the specific allegations, the outcome of this investigation could set a precedent for how scientific competitions address AI’s growing influence. The cilia video continues to be a central issue in a debate that intersects with art, science, and the development of digital imagery. Xu did not respond to the BBC’s inquiry, but has shared online that he did not violate the competition’s rules. AI was not used to generate the experimental movie, the cilia, or their motion,
he said. AI was used 'to distinguish and visualize features in the reconstructed grayscale images'.
The $3,000 (£2,250) prize, which Xu accepted, has also drawn attention. The recognition the award represents means more than the $3,000 (£2,250) prize itself, Hickey said, emphasizing the value of public engagement in scientific research.