(Image recognition technology is not yet sophisticated enough to automate the process, they say).
The feature, called "automatic alternative text", uses image recognition technology developed through machine-learning to identify the objects pictured.
Not least in the online search abilities, speech and translation features, and image recognition technology of my employer, Alphabet.
The system, which was introduced in early May, uses what Flickr describes as "advanced image recognition technology" to automatically categorise photos into a number of broad groups.
Using image recognition technology to automatic detect traffic incident via the existing highway surveillance cameras, is a very promise method.
But Google said image recognition technology would have to improve and the privacy implications would have to be more fully considered before it would make that possible.
Green Dam's designers say the program, which uses image recognition technology and text filtering to block material, is not capable of acting as spyware.
The tool is just one of a range of features that could make use of the company's sophisticated image recognition technology.
It seems that the phone decides what a screenshot or a selfie based on how they have been taken, rather than by using any special image recognition technology.
The image recognition technology used in today's autonomous cars and aerial drones as well as tomorrow's cancer-seeking robotic medical devices, all depend on artificial intelligence.
