Lutz R W, Pun T, Pellegrini C
Centre Universitaire Informatique, Geneve, Switzerland.
Comput Med Imaging Graph. 1991 Mar-Apr;15(2):73-84. doi: 10.1016/0895-6111(91)90029-u.
Image processing in biomedical research has become customary, along with use of colour displays to run image processing packages. The performance of softwares is highly dependent on the device they run on: architecture of colour display, depth of frame buffer, existence of look-up table, etc. Knowledge of such basic features is therefore becoming very important, especially because results can differ from device to device. This introductory paper discusses hardware features and software applications. A general architecture of colour displays is exposed, comparing the features of the most commonly used devices. Basic organisation of memory, electron gun and screen are analysed for each type of display, concluding with a more detailed study of raster scan devices. Frame buffer and look-up table organisation are then analysed in relation with overhead expenses such as time and memory. Relation between image data and displayed images is discussed. By means of examples, the manipulation of colour tables is examined in detail, showing how to improve display of images without altering image data. Finally, the basic operations performed by the look-up table editor developed at University of Geneva are presented.
随着彩色显示器用于运行图像处理软件包，图像处理在生物医学研究中已变得很常见。软件的性能高度依赖于其运行的设备：彩色显示器的架构、帧缓冲区的深度、查找表的存在等。因此，了解这些基本特征变得非常重要，尤其是因为不同设备的结果可能不同。这篇介绍性论文讨论了硬件特征和软件应用。展示了彩色显示器的一般架构，比较了最常用设备的特征。分析了每种类型显示器的内存、电子枪和屏幕的基本组织，最后对光栅扫描设备进行了更详细的研究。然后分析了帧缓冲区和查找表组织与时间和内存等开销的关系。讨论了图像数据与显示图像之间的关系。通过示例详细研究了颜色表的操作，展示了如何在不改变图像数据的情况下改善图像显示。最后，介绍了日内瓦大学开发的查找表编辑器执行的基本操作。
