Twitter Inc said on Friday it will launch a competition for computer researchers and hackers to identify biases in its image-cropping algorithm, after a group of researchers previously found the algorithm tended to exclude black people and men.
The competition is part of a wider effort across the tech industry to ensure artificial intelligence technologies act ethically.
The social networking company said in a blog post that the bounty competition was aimed at identifying "potential harms of this algorithm beyond what we identified ourselves."
Following criticism in 2020 about image previews in posts excluding black people's faces, the company said in May a study by three of its machine learning researchers found the algorithm did in fact display “unequal treatment based on demographic differences."
It favoured women more highly than men by 8 per cent, and it favoured photos of white people over black individuals by 4 per cent, Twitter said. Within those demographics, white women were more highly favoured by 7 per cent compared with black women; and white men were favoured 2 per cent more than black men.
The analysis also delved into objectification biases – or the “male gaze” – after people on Twitter identified instances where cropping chose a woman’s chest or legs as a salient feature. However, they “did not find any evidence that the algorithm cropped images of men or women in areas other than their face at a significant rate".
To determine this, they gave the algorithm 100 randomly chosen images and found that only three centred on bodies over faces. It stated that "when images weren't cropped at the head, they were cropped to non-physical aspects of the image, such as a number on a sports jersey".
"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.
On Friday, Twitter released publicly the computer code that decides how images are cropped in the Twitter feed, and said participants are asked to find how the algorithm could cause harm, such as stereotyping or denigrating any group of people.
The winners will receive cash prizes ranging from $500 to $3,500 and will be invited to present their work at a workshop hosted by Twitter at Def Con in August, one of the largest hacker conferences held annually in Las Vegas.
– Additional reporting by Reuters
How has net migration to UK changed?
The figure was broadly flat immediately before the Covid-19 pandemic, standing at 216,000 in the year to June 2018 and 224,000 in the year to June 2019.
It then dropped to an estimated 111,000 in the year to June 2020 when restrictions introduced during the pandemic limited travel and movement.
The total rose to 254,000 in the year to June 2021, followed by steep jumps to 634,000 in the year to June 2022 and 906,000 in the year to June 2023.
The latest available figure of 728,000 for the 12 months to June 2024 suggests levels are starting to decrease.
Racecard
6pm: The Pointe - Conditions (TB) Dh82,500 (Turf) 1,400m
6.35pm: Palm West Beach - Maiden (TB) Dh82,500 (T) 1,800m
7.10pm: The View at the Palm - Handicap (TB) Dh85,000 (Dirt) 1,400m
7.45pm: Nakeel Graduate Stakes - Conditions (TB) Dh100,000 (T) 1,600m
8.20pm: Club Vista Mare - Handicap (TB) Dh95,000 (D) 1,900m
8.55pm: The Palm Fountain - Handicap (TB) Dh95,000 (D) 1,200m
9.30pm: The Palm Tower - Handicap (TB) Dh87,500 (T) 1,600m
Abu Dhabi World Pro 2019 remaining schedule:
Wednesday April 24: Abu Dhabi World Professional Jiu-Jitsu Championship, 11am-6pm
Thursday April 25: Abu Dhabi World Professional Jiu-Jitsu Championship, 11am-5pm
Friday April 26: Finals, 3-6pm
Saturday April 27: Awards ceremony, 4pm and 8pm
Sole survivors
- Cecelia Crocker was on board Northwest Airlines Flight 255 in 1987 when it crashed in Detroit, killing 154 people, including her parents and brother. The plane had hit a light pole on take off
- George Lamson Jr, from Minnesota, was on a Galaxy Airlines flight that crashed in Reno in 1985, killing 68 people. His entire seat was launched out of the plane
- Bahia Bakari, then 12, survived when a Yemenia Airways flight crashed near the Comoros in 2009, killing 152. She was found clinging to wreckage after floating in the ocean for 13 hours.
- Jim Polehinke was the co-pilot and sole survivor of a 2006 Comair flight that crashed in Lexington, Kentucky, killing 49.
The biog
Place of birth: Kalba
Family: Mother of eight children and has 10 grandchildren
Favourite traditional dish: Al Harees, a slow cooked porridge-like dish made from boiled cracked or coarsely ground wheat mixed with meat or chicken
Favourite book: My early life by Sheikh Dr Sultan bin Muhammad Al Qasimi, the Ruler of Sharjah
Favourite quote: By Sheikh Zayed, the UAE's Founding Father, “Those who have no past will have no present or future.”
The biog
Name: Sari Al Zubaidi
Occupation: co-founder of Cafe di Rosati
Age: 42
Marital status: single
Favourite drink: drip coffee V60
Favourite destination: Bali, Indonesia
Favourite book: 100 Years of Solitude
What is cyberbullying?
Cyberbullying or online bullying could take many forms such as sending unkind or rude messages to someone, socially isolating people from groups, sharing embarrassing pictures of them, or spreading rumors about them.
Cyberbullying can take place on various platforms such as messages, on social media, on group chats, or games.
Parents should watch out for behavioural changes in their children.
When children are being bullied they they may be feel embarrassed and isolated, so parents should watch out for signs of signs of depression and anxiety
Profile of Bitex UAE
Date of launch: November 2018
Founder: Monark Modi
Based: Business Bay, Dubai
Sector: Financial services
Size: Eight employees
Investors: Self-funded to date with $1m of personal savings
It Was Just an Accident
Director: Jafar Panahi
Stars: Vahid Mobasseri, Mariam Afshari, Ebrahim Azizi, Hadis Pakbaten, Majid Panahi, Mohamad Ali Elyasmehr
Rating: 4/5
Dates for the diary
To mark Bodytree’s 10th anniversary, the coming season will be filled with celebratory activities:
- September 21 Anyone interested in becoming a certified yoga instructor can sign up for a 250-hour course in Yoga Teacher Training with Jacquelene Sadek. It begins on September 21 and will take place over the course of six weekends.
- October 18 to 21 International yoga instructor, Yogi Nora, will be visiting Bodytree and offering classes.
- October 26 to November 4 International pilates instructor Courtney Miller will be on hand at the studio, offering classes.
- November 9 Bodytree is hosting a party to celebrate turning 10, and everyone is invited. Expect a day full of free classes on the grounds of the studio.
- December 11 Yogeswari, an advanced certified Jivamukti teacher, will be visiting the studio.
- February 2, 2018 Bodytree will host its 4th annual yoga market.
Dhadak 2
Director: Shazia Iqbal
Starring: Siddhant Chaturvedi, Triptii Dimri
Rating: 1/5
The specs
Engine: 4.0-litre flat-six
Torque: 450Nm at 6,100rpm
Transmission: 7-speed PDK auto or 6-speed manual
Fuel economy, combined: 13.8L/100km
On sale: Available to order now
