Study on 3D displaying for volume data using holographic 3D display

1.研究目的本研究的目的是开发基于计算全息技术的体数据全息三维显示系统，并对三维图像进行评价。2.研究结果(1)我们成功地用体数据的全息图显示了三维图像，与以前相比，能够实现大尺寸的全息图。通过这一发展，在技术上提供了新的知识。此外，通过肉眼可见的大尺寸全息图验证了该方法的有效性。然而，另一方面，量化和计算算法等我们今后必须研究的问题也变得新的清晰起来。研究成果可作为实际应用的试金石。(2)研制了一套完整的医学图像三维显示系统：(I)在东京都大学对体数据进行扫描，(Ii)传输到北海道大学。(3)此外，在每项研究领域，我们还取得了以下结果：(I)用于真实感成像的计算全息图的新算法；(Ii)新的器官分割方法和图像处理方法；(Iii)新的大尺寸、高分辨率的条纹打印机；(Iv)新的3D图像压缩方法。

1.ObjectivesPurpose of this study is to develop holographic 3D display system for volume data using a computer-generated hologram technique and to evaluate the 3D images.2.Results of research(1)We succeeded in displaying a three-dimensional image by a hologram of volume data and were able to realize a large-sized hologram in comparison with before. New knowledge was provided through this development technically. In addition, I clarified the effectiveness of the method by the large-size holograms that are able to see by naked eyes. However, on the other hand, the problems such as quantization and calculation algorithm, which we must study in future, became clear newly. The results of research were able to become a touchstone for practical use.(2)We have developed a total 3D displaying system for medical images : (i)volume data are scanned at Tokyo Metropolitan Univ., (ii)transmitted to Hokkaido Univ. though the internet, (iii)calculated for hologram data, (iv)transmitted to Kanasai Univ., and (v)printed on photo plates.(3)In addition, in the field of each study, we were able to achieve the following results :(i)New rendering algorithms for computer-generated hologram that are useful for realistic imaging,(ii)New segmentation methods for organs and image processing methods,(iii)A new fringe printer that is large size and high resolution,(iv)New 3D image compression metods.