JPEGmini is a new image compression service that can magically reduce the file size of your JPEG photos by up to 5 times without any visible loss in quality. ICVT, the Israeli company behind the service, explains how the technology works in an interview with Megapixel:

Our technology analyzes each specific photo, and determines the maximum amount of compression that can be applied to the photo without creating any visual artifacts. In this way, the system compresses each photo to the maximum extent possible without hurting the perceived quality of the photo.

You can test out the technology on your own photos through the service’s website.
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Emotional Breakdown is a cool new web app that attempts to gauge the mood of the world every day by analyzing the photographs found on The Guardian’s 24 hours in pictures. Using facial recognition technology to find happy, sad, angry, surprised or neutral faces in the images, the app creates a colorful pie chart breaking down the emotions. From the chart above, we see that the world was mostly neutral, surprised, and happy today.

Even cooler is the fact that you can also run the tool on any other URL. Try your own photo collection to see what emotions you’ve been capturing in your images.

Emotional Breakdown (via Mashable)