# 电子工程代写|三维成像代写Three-Dimensional Imaging代考|CSAT3350

## 电子工程代写|三维成像代写Three-Dimensional Imaging代考|The Slanted Lenticular Lens Method

Although the slanted lenticular lens technique is not an issue directly related to the 3-D/2-D convertible display, it is an important method that can be used to display 3-D images which are more natural and have better quality. Therefore, we need to review the slanted lenticular lens method. In conventional 3-D systems with parallax barriers or normal lenticular lenses, only the horizontal parallax is provided to satisfy the binocular disparity of 3-D images. As a result, only the horizontal resolution of the 3-D display system is decreased, whereas the vertical resolution remains unchanged. Moreover, the periodical structure of the parallax barrier and normal lenticular lens is only in the horizontal direction. This structure results in a black stripe pattern and color separation which comes from the sub-pixel structure of the display panel. The pattern and color separation degrade the quality of the 3-D image.

The slanted lenticular lens technique is the most advanced method which can mitigate some of the disadvantages of the current parallax barrier/normal lenticular lens method by tilting the lenticular lens $[7,8,9]$. The structure and principle of the slanted lenticular lens are shown in Fig. 4.6. With the slanted structure of the lenticular lens, the 3-D pixel is composed of $\mathrm{R} / \mathrm{G} / \mathrm{B}$ sub-pixels which are located in a different column and row as shown in Fig. 4.6(a). As a result, the resolution degradation in the 3-D mode is divided into both horizontal and vertical directions. Moreover, with the slanted structure, there is no black stripe, as shown in Fig. 4.6(b), since the $\mathrm{R} / \mathrm{G} / \mathrm{B}$ sub-pixels are observed between the black matrices. Therefore, the quality of the 3-D image can bé enhancèd.

Philips has adopted this technique and demonstrated a 42-inch 3-D display system. It recently extended this technique and demonstrated a 3-D/2-D converrtiblé 42 -inch display systêm [9].

## 电子工程代写|三维成像代写Three-Dimensional Imaging代考|3-D/2-D Convertible Integral Imaging

The integral imaging $[10,11,12]$ is a technique which is now working its way through necessary research. It has not yet been developed as part of any commercial products although some demonstration systems have been developed by a few companies like Hitachi (in cooperation with the University of Tokyo), Toshiba and NHK $[12,13,14]$. In this section, we categorize and review various 3-D/2-D convertible integral imaging systems. In integral imaging, there are mainly two kinds of 3-D/2-D convertible methods. One method adopts a point light source array, while the other uses a lens array. These two methods have different properties and, therefore, are suitable for different applications.

In a common integral imaging system, the 3-D image is formed from elemental images through a lens array. However, the lens array is a fixed device and is an obstacle for 3-D/2-D conversion. Therefore, various 3-D/2-D convertible methods which do not use a lens array have been developed. In an integral imaging system, a lens array can be replaced with a point light source array or pinhole array $[15,16]$. The principle to display a 3 -D image, using a point light source array and elemental images, is illustrated in Fig. $4.7$ [15]. The lens array has better optical properties than the point light source array or pinhole array. However, the point light source array is easier to generate/eliminate and is suitable for 3 – $\mathrm{D} / 2-\mathrm{D}$ convertible integral imaging.

## 电子工程代写|三维成像代写Three-Dimensional Imaging代考|3-D/2-D Convertible Integral Imaging

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