TWITTER Inc said 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 last year about image previews in posts excluding Black people's faces, the company said in May…