How To Blur A Face In A Photo Iphone

A photo a protest in Washington Square in New York, processed with a face-blurring tool (all photos by the author for Hyperallergic)

Tens of thousands of Americans are taking to the streets to protest systemic racism and the killing of Black citizens at the hands of police. Images of the protests abound on social media, carrying the risk of revealing the identity of activists and unintentionally aiding the police or the Federal Bureau of Investigation (FBI) in tracking and targeting them. Noah Conk, a San Francisco-based software developer, innovated a new approach to this problem with a software tool for iPhone that automatically blurs faces in photos and erases their metadata, allowing them to be shared without revealing any information as to where and when they were taken.

Together with other programmers who preferred to remain anonymous, Conk designed and developed an iOS shortcut that allows users to choose any photo from their phones and blur out all the faces in it. The shortcut then saves a copy of the photo as a "flat JPEG," deleting all meta-data relating to GPS location, time, and the camera with which the photo was taken. (See instructions on how to install the shortcut here.)

"Many people are new to protesting and don't realize that identities during these political times need to be hidden," Conk told Hyperallergic in an interview. "I saw people posting convoluted steps to blur out faces and protect those protesting. It was over-complicated and more in-depth for what the average person would want to do." (For protest images not processed through the shortcut, another method to remove metadata after blurring faces is to screenshot an image and publish the copy in lieu of the original.)

The "Blur Faces" shortcut installed on an iPhone

The blur tool activates a series of actions through Apple's standard Shortcuts app. Conk said he chose to create a shortcut rather than a full app to avoid waiting through Apple's lengthy process of app approval.

The shortcut uses a face-detector to identify the faces within a photo. Any face found gets resized to a minuscule size and then it gets scaled back up in a way that makes it difficult for algorithms to reverse-blur the faces.

As of now, the shortcut is only available for iPhone users. But the secure messaging app Signal has recently released a similar face-blurring feature that works on both iPhone and Android devices.

"Many people are new to protesting and don't realize that identities during these political times need to be hidden," software developer Noah Conk said

Conk said he started working on the shortcut after a friend in Seattle was arrested during a recent protest and "pummeled by multiple police officers."

"I was searching for lawyers and bail from afar, being in San Francisco," he said. "The situation made me feel helpless."

Developing the tool, he said, was his way of showing his support with the protesters.

"This is shortcut was built out of anger and frustration of the current state of affairs. It's protection and unity."

Opportunities in December 2021

From commissions to residencies and fellowships for artists, curators, and teachers, a list of opportunities that artists, writers, and art workers can apply for each month.

Recently Discovered Forrest Bess Paintings

It is one thing to be a visionary and another to be one whose work holds your attention for a sustained period of time.

Hakim Bishara is a staff writer for Hyperallergic. He is also a co-director at Soloway Gallery, an artist-run space in Brooklyn. Bishara is a recipient of the 2019 Andy Warhol Foundation and Creative Capital... More by Hakim Bishara