Twitter investigates complaints its photo-cropping tool favours white faces
- Questions swirl about possible racial bias in Twitter image function
- Twitter promised to investigate after users offer anecdotal evidence

Social media giant Twitter said on Monday it would investigate its image-cropping function that users complained favoured white faces over black.
The image preview function of Twitter’s mobile app automatically crops pictures that are too big to fit on the screen and selects which parts of the image to display and cut off.
Prompted by a graduate student who found an image he was posting cropped out the face of a black colleague, a San Francisco-based programmer found Twitter’s system would crop out images of President Barack Obama when posted alongside Republican Senate Leader Mitch McConnell.
“Twitter is just one example of racism manifesting in machine learning algorithms,” the programmer, Tony Arcieri, wrote on Twitter.
Twitter is one of the world’s most popular social networks, with nearly 200 million daily users.
Other users shared similar experiments online they said showed Twitter’s cropping system favouring white people.