Cloudinary Blog

Face detection based cropping

Crop and Resize Images Using Face Detection Technology


Cloudinary’s roots go back to when we needed to embed users’ uploaded images and profile pictures for web projects we’ve developed.

We had to show people and faces of users in various dimensions and perspectives, and the process proved cumbersome.

These days, Cloudinary allows you to easily resize and crop your images to snugly fit the graphics design. But sometimes, just resizing pictures using ‘fill’ crop and ‘center’ gravity just doesn’t cut it. This is a common problem with user profile photos.

 

So we thought it is about time we add some more brainpower into the cropping process. Of-course we could just let the users manually crop their own profile pictures, but that just wasn’t fun enough :)

We decided to add face detection based cropping. Facebook use it internally to find faces of users and crop the profile pictures accordingly. Google does it as well. What about the rest of us?

Fortunately, we didn’t need to invent the wheel. Some top-notch face detection open source algorithms are freely available today. They are just not production ready or easy to integrate. The good news - we did the heavy lifting for you. We integrated existing tools and libraries, optimized their settings and added smart face detection based cropping to Cloudinary. Try it out - you won’t believe the difference that it makes.

Cloudinary supports either a single face detection or multiple faces detection (i.e., focusing on the people in a picture). You can easily create a face thumbnail of your users, crop an image to focus on a person or resize an image to fill the required dimensions while making sure the person in the original picture appears in the resized version of the image. And as usual, Cloudinary does all this automatically for you in the cloud and delivers the images through a fast CDN.

 

 

Using face detection based cropping with Cloudinary is very simple. Below are examples showing both cropping via our universal dynamic URLs and our Ruby on Rails integration.

https://res.cloudinary.com/demo/image/upload/w_100,h_100,c_thumb,g_face/face_top.jpg

<%= cl_image_tag("face_top.jpg", :width =>100, :height => 100,
:crop => :thumb, :gravity => :face) %>

For more details and usage examples, take a look at our documentation: https://cloudinary.com/documentation/image_transformations#face_detection

This feature is now available across all our plans, including the free one. We hope you like it.

 

Recent Blog Posts

Android Data Saver: Optimizing Mobile Data Usage with Cloudinary

Over the life of a mobile device, the cost of a cellular data plan often exceeds that of the device itself. To optimize data usage and purge useless data on their mobile devices, users can enable Data Saver from Android 7.0 (API level 24). To do so, users toggle Data Saver in quick settings under the Notification shade or under Settings > Data usage. With Data Saver enabled, apps that aren't whitelisted cannot use cellular data in the background. They are also directed to consume less data while active.

Read more
Introducing the Cloudinary Upload Widget v2

At Cloudinary, we manage the entire pipeline of media assets for thousands of customers of varying sizes from numerous verticals. Cloudinary is an end-to-end solution for all your image and video needs, including upload, storage, administration, manipulation, optimization and dynamic delivery.

Read more
Convert an Image to a 3D Canvas With Cloudinary

Note
This post was cowritten with Daniel Mendoza.
Note
This post was cowritten with Daniel Mendoza.
Note

Famed American poet Henry David Thoreau once said, “This world is but a canvas to our imagination.” And, like your imagination, the transformations you can apply to images with Cloudinary are practically endless. You can even render any flat image to appear three-dimensional and framed on a canvas.

Read more
Mobile Optimization: Optimize Your Mobile-Web User Experience

TL;DR

We live in a visual world, often while on the go, and consumers expect media-rich web content. Accordingly, the loading speed of images and videos is a big factor in user experience. To optimize customer satisfaction with your mobile content, you must focus on the quality, format, and size of your digital assets. With Cloudinary, optimization is simple, not only enhancing your mobile web and app performance, but also upping your SEO game and boosting customer experience.

Read more