YEBIS Optic Based Post-Processing


Depth of Field Effects

Realize optically convincing bokeh effects just as if photographing with a real lens.

Depth of Field effects as if using a real lens

Depth of Field effect is the blur effect or ‘bokeh’ observed in out-of-focus areas in our field of vision. It is well known in lens photography and it is definitely a nice way to detach an object from the background, redirect the attention to certain areas of the scene or simply to add a beautiful artistic touch.

The following illustrates the Depth of Field effect depending on the area in focus.


Depth of Field Effects

Computer graphics (CG) are created by constructing a 3D virtual space and rendering a scene as viewed from a virtual camera (point of view). Since the images are not taken through an actual lens, CG visuals appear different from images in our field of vision or photographed with a camera.

The first is a Depth of Field element. Depth of Field is the distance between the nearest and farthest objects in focus in a field. The depth of focus in CG as created with rendering is actually limitless. In other words, rendering is set in terms of a camera. It creates an image in focus between a point at zero distance and a point at infinite distance. Naturally no such camera or lens exists in the real world, and this is one of the reasons that early CGs appeared so artificial.

In game graphics of the 90’s prior to the arrival of programmable shaders, this level of detail could not be handled by the technology. Recently, advances in techniques have brought the ability to create graphics that appear realistic. These developments have resulted in the introduction of post-effect Depth of Field.

YEBIS deals with these artificial rendering effects by using Depth of Field effects to generate an image of a scene that appears as if it is being viewed through a camera lens.

YEBIS does not achieve the Depth of Field effect by simple image processing, but uses a proprietary algorithm to recreate the optical phenomenon of photographing through an actual lens. Comparing post-effects achieved with YEBIS with general post-effects, a difference in the quality of the blur in the out-of-focus areas becomes very apparent. The general Depth of Field post-effects show an out-of-focus area where the blur is uniformly spread out; however YEBIS creates an aperture-shaped ‘bokeh’ because it recreates the way that light passes through the aperture mechanism attached to the lens. YEBIS acts as actual camera photography where the larger the area of the focus shift, the larger the size of the aperture-shaped ‘bokeh’.

The size of the aperture-shaped ‘bokeh’ in the Depth of Field effect in YEBIS can be fully customized. YEBIS interfaces with the HDR rendering pipeline and if high luminosity areas created by HDR rendering are blurred, the high luminosity information is retained and a high luminosity blur is accurately recreated.

Free Trial Version
Download the YEBIS Free Trial Version

The only currently downloadable platform is for Windows PC.

System Requirements

OS Windows 7 or later
Compiler Microsoft Visual Studio 2010
Compatible with DX SDK Since June 2010
Compatible hardware DirectX 10 or later

Update Notes

May 29, 2015
- “Natural Bone” : The effect parameters tweaking demo added.
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Apprication Form

If you wish to acquire a trial version for PlayStation®4, PlayStation®3, PlayStation®Vita, Xbox One, Xbox 360, Android, iOS, Linux, or other embedded equipment, please submit a request above.

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