Moire fringe reduction by optical filters in integral three-dimensional imaging on a color flat-panel display

Abstract

We propose a method to reduce the color moire fringes that are attributable to the structure of a color flat-panel display in integral three-dimensional imaging. The method uses two types of optical low-pass filter, diffuser and defocus. The effectiveness of the method was confirmed in an experiment. We describe a way to design these filters with moire's residual energy and video signal energy as indices and demonstrate the validity of the model, which combines two filters to reduce moire fringes.

5.4: The Autostereoscopic System with Diffractive Optical Elements

“…With the accurate alignment of lenticular films, the roughness of the lens surface would result in dispersion or crosstalk [4]. On the other hand, the non-transparent area of grating spectroscopic films reduces four-fifth of the brightness of the entire panel [5], and the column arrangement is likely to appear moiré on the original LCD panel [6,7]. To improve the above defects, in diffractive optics, holographic optical element (HOE) and diffraction optical element (DOE) are new class of autostereoscopic technique, because they can offer unique optical properties that are not possible with traditional optical elements.…”

Simulation of Moire Effect in 3D Displays

“…In the λφ-plane, the curves defined by Eqs. (2) and (3) turn out to be generalized circles (either straight lines or circles).…”

“…[1]. Among them in particular, various techniques were proposed to reduce moirés: using filters [2], finding an optimal angle in the general (blackand-white) case [3] and especially for color displays [1].…”

A Survey of Signal Processing Problems and Tools in Holographic Three-Dimensional Television

“…Techniques have been proposed to improve the depth of viewing field based on amplitude modulated microlenses [48], a change of the optical path length [49], synthesis of real and virtual image fields [50], or on the use of microlenses with nonuniform focal lengths and aperture sizes [51]. The issues of scene occlusion [52] as well as removal of the multifacet structure [39] or suppression of color moire [53] in the reconstructed images have been successfully resolved. The maximum information capacity of integral imaging and image compression by the Karhunen-Loeve transform are discussed in [54], [55].…”