Researchers have found that Twitter's image-cropping algorithm, which went viral after it was shown to exclude black people and men, is also coded with an indirect bias against a number of other groups.
The discovery was made during the Def Con hacker convention in Las Vegas in the US, where researchers found that the feature also discriminates against women who wear headscarves, people with white or grey hair and people who use wheelchairs.
The feature was removed after it was discovered that the image-cropping algorithm chose points of focus on pictures, which Twitter calls the saliency, and found occasional instances of bias in cropped pictures in favour of women and lighter skin tones.
According to findings, there was an 8 per cent difference from demographic parity in favour of women, 4 per cent difference in favour of white individuals overall, while comparisons of white and black women showed a difference of 7 per cent in favour of white women.
In comparisons of black and white men, there was a 2 per cent difference in favour of white men.
Twitter launched the saliency algorithm in 2018 to crop images to improve consistency in the size of photos, so viewers could see more tweets in one glance.
"We considered the trade-offs between the speed and consistency of automated cropping with the potential risks we saw in this research. One of our conclusions is that not everything on Twitter is a good candidate for an algorithm, and in this case, how to crop an image is a decision best made by people," Rumman Chowdhury, Twitter's director of software engineering, wrote in a blog post in May.
After the initial discovery, the company launched a competition, inviting researchers to identify other ways the image-cropping algorithm could cause harm.
Twitter gave out cash prizes, including $3,500, to the winner, and smaller amounts to runners-up.
Key facilities
- Olympic-size swimming pool with a split bulkhead for multi-use configurations, including water polo and 50m/25m training lanes
- Premier League-standard football pitch
- 400m Olympic running track
- NBA-spec basketball court with auditorium
- 600-seat auditorium
- Spaces for historical and cultural exploration
- An elevated football field that doubles as a helipad
- Specialist robotics and science laboratories
- AR and VR-enabled learning centres
- Disruption Lab and Research Centre for developing entrepreneurial skills
Day 1, Abu Dhabi Test: At a glance
Moment of the day Dimuth Karunaratne had batted with plenty of pluck, and no little skill, in getting to within seven runs of a first-day century. Then, while he ran what he thought was a comfortable single to mid-on, his batting partner Dinesh Chandimal opted to stay at home. The opener was run out by the length of the pitch.
Stat of the day - 1 One six was hit on Day 1. The boundary was only breached 18 times in total over the course of the 90 overs. When it did arrive, the lone six was a thing of beauty, as Niroshan Dickwella effortlessly clipped Mohammed Amir over the square-leg boundary.
The verdict Three wickets down at lunch, on a featherbed wicket having won the toss, and Sri Lanka’s fragile confidence must have been waning. Then Karunaratne and Chandimal's alliance of precisely 100 gave them a foothold in the match. Dickwella’s free-spirited strokeplay meant the Sri Lankans were handily placed at 227 for four at the close.
Charlotte Gainsbourg
Rest
(Because Music)
The Baghdad Clock
Shahad Al Rawi, Oneworld
Killing of Qassem Suleimani
F1 The Movie
Starring: Brad Pitt, Damson Idris, Kerry Condon, Javier Bardem
Director: Joseph Kosinski
Rating: 4/5
Ronaldo's record at Man Utd
Seasons 2003/04 - 2008/09
Appearances 230
Goals 115
Our family matters legal consultant
Name: Hassan Mohsen Elhais
Position: legal consultant with Al Rowaad Advocates and Legal Consultants.
Key features of new policy
Pupils to learn coding and other vocational skills from Grade 6
Exams to test critical thinking and application of knowledge
A new National Assessment Centre, PARAKH (Performance, Assessment, Review and Analysis for Holistic Development) will form the standard for schools
Schools to implement online system to encouraging transparency and accountability
Mohammed bin Zayed Majlis
Global state-owned investor ranking by size
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MATCH INFO
Uefa Champions League, last-16. first leg
Atletico Madrid v Juventus, midnight (Thursday), BeIN Sports
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yallacompare profile
Date of launch: 2014
Founder: Jon Richards, founder and chief executive; Samer Chebab, co-founder and chief operating officer, and Jonathan Rawlings, co-founder and chief financial officer
Based: Media City, Dubai
Sector: Financial services
Size: 120 employees
Investors: 2014: $500,000 in a seed round led by Mulverhill Associates; 2015: $3m in Series A funding led by STC Ventures (managed by Iris Capital), Wamda and Dubai Silicon Oasis Authority; 2019: $8m in Series B funding with the same investors as Series A along with Precinct Partners, Saned and Argo Ventures (the VC arm of multinational insurer Argo Group)
Did you know?
Brunch has been around, is some form or another, for more than a century. The word was first mentioned in print in an 1895 edition of Hunter’s Weekly, after making the rounds among university students in Britain. The article, entitled Brunch: A Plea, argued the case for a later, more sociable weekend meal. “By eliminating the need to get up early on Sunday, brunch would make life brighter for Saturday night carousers. It would promote human happiness in other ways as well,” the piece read. “It is talk-compelling. It puts you in a good temper, it makes you satisfied with yourself and your fellow beings, it sweeps away the worries and cobwebs of the week.” More than 100 years later, author Guy Beringer’s words still ring true, especially in the UAE, where brunches are often used to mark special, sociable occasions.
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What She Ate: Six Remarkable Women & the Food That Tells Their Stories
Laura Shapiro
Fourth Estate
Volvo ES90 Specs
Engine: Electric single motor (96kW), twin motor (106kW) and twin motor performance (106kW)
Power: 333hp, 449hp, 680hp
Torque: 480Nm, 670Nm, 870Nm
On sale: Later in 2025 or early 2026, depending on region
Price: Exact regional pricing TBA
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