Iris Blur is a blurring effect, commonly found in photo editing software like Adobe Photoshop, that creates a shallow depth-of-field effect, simulating the focusing characteristics of a camera lens's iris. It allows you to define a sharp area within an image, surrounded by a gradually increasing blur.
Here's a breakdown of how it works:
-
The Pin (Center Point): The central point of the Iris Blur acts as a target. At the exact center, the image remains perfectly sharp.
-
The Blur Ring: Surrounding the pin is a visual ring that defines the transition zone. Inside this ring, the image remains relatively sharp. As you move outwards from the ring, the blur effect intensifies.
-
Gradual Blurring: The blur increases gradually as you move further away from the pin/center, creating a smooth and realistic transition between the focused and blurred areas. This is what mimics a real camera's depth of field.
In essence, Iris Blur allows you to selectively blur parts of an image while keeping a specific area sharp, drawing the viewer's attention to that focused point. Think of it like using a camera lens with a very wide aperture, where only a small portion of the image is in sharp focus, and the rest fades into a soft blur.
