It may seem like something straight out of CSI, but the Shake Reduction feature in Photoshop is here and now. But does it really work as advertised? Let’s give it a go and find out.
How It Works
In a perfect world, any kind of motion blur would be would be one-directional and constant. However, in real life, things are a bit different. The path of the motion blur depends greatly on the focal length, shutter speed, hand movement, and subject movement during the shot. What this means is that Photoshop’s job is to analyze the photo and try to determine this motion blur path in order to try and compensate for it.
What you can see below is an example of what a motion blur path may look like. Notice how aside from the thick white line there are also some small artefact-like sprites in the background, which may indicate any additional motion or shake detected by Photoshop.
Since removing the blur uses a sophisticated method of “re-stacking” the image back together, it’s normal to expect artefacts and imperfections in the final rendered image. Here’s an example of how heavy motion blur compensation can introduce other problems in an image: