摘要 :
A lenticular display system provides 3D images to a viewer without wearing glasses. For N-view lenticular display, N view images are N:1 sub-sampled and multiplexed to generate a multi-view image, Then, the generated image is allo...
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A lenticular display system provides 3D images to a viewer without wearing glasses. For N-view lenticular display, N view images are N:1 sub-sampled and multiplexed to generate a multi-view image, Then, the generated image is allocated to the LCD pixel array. Since the lenticular sheet may not be exquisitely placed on an LCD panel without alignment error, and the rays from a viewer's eye to lenticules on the LCD panel are not parallel, any view image observed from a multi-view image inevitably produces undesirable distortion. In this paper, we propose a novel method to alleviate the display distortion of each view image in the lenticular display. In this method, we first derive the relationship between pixel values on the LCD pixel array and the image to be observed at each viewing zone in terms of hardware parameters and viewer's eye position. Based on this relationship, we analyze the distortion between the observed and original view images. Finally, we derive the compensation algorithm to minimize the distortion and generate high quality a 3D image. To verify the proposed scheme, we examine the displayed results from several 3D images of synthetic and real scenes. The experimental results show that the proposed scheme significantly reduces distortions and improves the image quality in the lenticular display.
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摘要 :
A lenticular display system provides 3D images to a viewer without wearing glasses. For N-view lenticular display, N view images are N:1 sub-sampled and multiplexed to generate a multi-view image, Then, the generated image is allo...
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A lenticular display system provides 3D images to a viewer without wearing glasses. For N-view lenticular display, N view images are N:1 sub-sampled and multiplexed to generate a multi-view image, Then, the generated image is allocated to the LCD pixel array. Since the lenticular sheet may not be exquisitely placed on an LCD panel without alignment error, and the rays from a viewer's eye to lenticules on the LCD panel are not parallel, any view image observed from a multi-view image inevitably produces undesirable distortion. In this paper, we propose a novel method to alleviate the display distortion of each view image in the lenticular display. In this method, we first derive the relationship between pixel values on the LCD pixel array and the image to be observed at each viewing zone in terms of hardware parameters and viewer's eye position. Based on this relationship, we analyze the distortion between the observed and original view images. Finally, we derive the compensation algorithm to minimize the distortion and generate high quality a 3D image. To verify the proposed scheme, we examine the displayed results from several 3D images of synthetic and real scenes. The experimental results show that the proposed scheme significantly reduces distortions and improves the image quality in the lenticular display.
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摘要 :
A multilayer display is an autostereoscopic display constructed by stacking multiple layers of LC (liquid crystal) panels on top of a light source. It is capable of delivering smooth, continuous, and position-dependent images to v...
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A multilayer display is an autostereoscopic display constructed by stacking multiple layers of LC (liquid crystal) panels on top of a light source. It is capable of delivering smooth, continuous, and position-dependent images to viewers within a prescribed viewing zone. However, the images thus delivered may contain artifacts, which are inconsistent with real 3D scenes. For example, objects occluding one another may fuse together, or get obscured in the delivered images. To reduce such artifacts, it is often necessary to narrow the viewing zone. Using a directional rather than a uniform light source is one way to mitigate this problem. In this work, we present another solution to the problem. We propose an integrated architecture of multilayer and lenticular displays, where multiple LC panels are sandwiched between pairs of lenticular sheets. By associating a pair of lenticular sheets with a LC panel, each pixel in the panel is transformed into a view-dependent pixel, which is visible only from a particular viewing direction. Since all pixels in the integrated architecture are view-dependent, the display is partitioned into several sub-displays, each of which corresponds to a narrow viewing zone. The partitioning of display will reduce the possibility that the artifacts are noticeable in the delivered images. We will show several simulation results confirming that the proposed extension of multilayer display can deliver more plausible images than conventional multilayer display.
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摘要 :
A multilayer display is an autostereoscopic display constructed by stacking multiple layers of LC (liquid crystal) panels on top of a light source. It is capable of delivering smooth, continuous, and position-dependent images to v...
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A multilayer display is an autostereoscopic display constructed by stacking multiple layers of LC (liquid crystal) panels on top of a light source. It is capable of delivering smooth, continuous, and position-dependent images to viewers within a prescribed viewing zone. However, the images thus delivered may contain artifacts, which are inconsistent with real 3D scenes. For example, objects occluding one another may fuse together, or get obscured in the delivered images. To reduce such artifacts, it is often necessary to narrow the viewing zone. Using a directional rather than a uniform light source is one way to mitigate this problem. In this work, we present another solution to the problem. We propose an integrated architecture of multilayer and lenticular displays, where multiple LC panels are sandwiched between pairs of lenticular sheets. By associating a pair of lenticular sheets with a LC panel, each pixel in the panel is transformed into a view-dependent pixel, which is visible only from a particular viewing direction. Since all pixels in the integrated architecture are view-dependent, the display is partitioned into several sub-displays, each of which corresponds to a narrow viewing zone. The partitioning of display will reduce the possibility that the artifacts are noticeable in the delivered images. We will show several simulation results confirming that the proposed extension of multilayer display can deliver more plausible images than conventional multilayer display.
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摘要 :
Autostereoscopic displays have wider and wider applications, and optical quality evaluation is the bedrock for market development. Unfortunately, we lack the 3D display measurement standard (3D DMS), human factor and even standard...
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Autostereoscopic displays have wider and wider applications, and optical quality evaluation is the bedrock for market development. Unfortunately, we lack the 3D display measurement standard (3D DMS), human factor and even standardized measurement instruments currently. Some studies reported the autostereoscopic display measurement using current optical measurement instrument such as luminance meter, CCD and conoscope1'2'3'4, but the problem now is how to verify those data? In this paper, we measured the optimal viewing distance (OVD), designated eye positions (DEP) and system-crosstalk of an autostereoscopic display and discussed some specific issues, like the affection of pupil size and measurement distance, method to find out the OVD, etc. which is usually met in 3D display measurement, and calculate the designated eye positions from the raw data using one-point method and two-point methods. The measurement was made by a luminance meter and the results were compared to the designed parameters.
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摘要 :
Autostereoscopic displays have wider and wider applications, and optical quality evaluation is the bedrock for market development. Unfortunately, we lack the 3D display measurement standard (3D DMS), human factor and even standard...
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Autostereoscopic displays have wider and wider applications, and optical quality evaluation is the bedrock for market development. Unfortunately, we lack the 3D display measurement standard (3D DMS), human factor and even standardized measurement instruments currently. Some studies reported the autostereoscopic display measurement using current optical measurement instrument such as luminance meter, CCD and conoscope(1,2,3,4), but the problem now is how to verify those data? In this paper, we measured the optimal viewing distance (OVD), designated eye positions (DEP) and system-crosstalk of an autostereoscopic display and discussed some specific issues, like the affection of pupil size and measurement distance, method to find out the OVD, etc. which is usually met in 3D display measurement, and calculate the designated eye positions from the raw data using one-point method and two-point methods. The measurement was made by a luminance meter and the results were compared to the designed parameters.
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An analysis has been made of the stability of the images generated by electronic autostereoscopic 3D displays, studying the time course of the photometric and colorimetric parameters. The measurements were made on the basis of the...
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An analysis has been made of the stability of the images generated by electronic autostereoscopic 3D displays, studying the time course of the photometric and colorimetric parameters. The measurements were made on the basis of the procedure recommended in the European guideline EN 61747-6 for the characterization of electronic liquid-crystal displays (LCD). The study uses 3 different models of autostereoscopic 3D displays of different sizes and numbers of pixels, taking the measurements with a spectroradiometer (model PR-670 SpectraScan of PhotoResearch). For each of the displays, the time course is shown for the tristimulus values and the chromaticity coordinates in the XYZ CIE 1931 system and values from the time periods required to reach stable values of these parameters are presented. For the analysis of how the procedure recommended in the guideline EN 61747-6 for 2D displays influenced the results, and for the adaption of the procedure to the characterization of 3D displays, the experimental conditions of the standard procedure were varied, making the stability analysis in the two ocular channels (RE and LE) of the 3D mode and comparing the results with those corresponding to the 2D. The results of our study show that the stabilization time of a autostereoscopic 3D display with parallax barrier technology depends on the tristimulus value analysed (X, Y, Z) as well as on the presentation mode (2D, 3D); furthermore, it was found that whether the 3D mode is used depends on the ocular channel evaluated (RE, LE).
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摘要 :
An analysis has been made of the stability of the images generated by electronic autostereoscopic 3D displays, studying the time course of the photometric and colorimetric parameters. The measurements were made on the basis of the...
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An analysis has been made of the stability of the images generated by electronic autostereoscopic 3D displays, studying the time course of the photometric and colorimetric parameters. The measurements were made on the basis of the procedure recommended in the European guideline EN 61747-6 for the characterization of electronic liquid-crystal displays (LCD). The study uses 3 different models of autostereoscopic 3D displays of different sizes and numbers of pixels, taking the measurements with a spectroradiometer (model PR-670 SpectraScan of PhotoResearch). For each of the displays, the time course is shown for the tristimulus values and the chromaticity coordinates in the XYZ CIE 1931 system and values from the time periods required to reach stable values of these parameters are presented. For the analysis of how the procedure recommended in the guideline EN 61747-6 for 2D displays influenced the results, and for the adaption of the procedure to the characterization of 3D displays, the experimental conditions of the standard procedure were varied, making the stability analysis in the two ocular channels (RE and LE) of the 3D mode and comparing the results with those corresponding to the 2D. The results of our study show that the stabilization time of a autostereoscopic 3D display with parallax barrier technology depends on the tristimulus value analysed (X, Y, Z) as well as on the presentation mode (2D, 3D); furthermore, it was found that whether the 3D mode is used depends on the ocular channel evaluated (RE, LE).
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In this paper, we propose multiple recording process of photopolymer for a full-color multi-view including multiple-view auto-stereoscopic 3D display system based on VHOE (Volume Holographic Optical Element). To overcome the probl...
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In this paper, we propose multiple recording process of photopolymer for a full-color multi-view including multiple-view auto-stereoscopic 3D display system based on VHOE (Volume Holographic Optical Element). To overcome the problems such as low resolution, and limited viewing zone of conventional 3D-display without glasses, we designed multiple recording condition of VHOE for multi-view display. It is verified that VHOE may be optically made by angle-multiplexed recording of pre-designed multiple-viewing zone that uniformly is recorded through optimized exposure-time scheduling scheme. Here, VHOE-based backlight system for 4-view stereoscopic display is implemented, in which the output beams that playing a role reference beam from LGP(Light guide plate)t may be sequentially synchronized with the respective stereo images displayed on the LCD panel.
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摘要 :
In this paper, we propose multiple recording process of photopolymer for a full-color multi-view including multiple-view auto-stereoscopic 3D display system based on VHOE (Volume Holographic Optical Element). To overcome the probl...
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In this paper, we propose multiple recording process of photopolymer for a full-color multi-view including multiple-view auto-stereoscopic 3D display system based on VHOE (Volume Holographic Optical Element). To overcome the problems such as low resolution, and limited viewing zone of conventional 3D-display without glasses, we designed multiple recording condition of VHOE for multi-view display. It is verified that VHOE may be optically made by angle-multiplexed recording of pre-designed multiple-viewing zone that uniformly is recorded through optimized exposure-time scheduling scheme. Here, VHOE-based backlight system for 4-view stereoscopic display is implemented, in which the output beams that playing a role reference beam from LGP(Light guide plate)t may be sequentially synchronized with the respective stereo images displayed on the LCD panel.
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