A Study of image porocessing and 3-D graphics for the blind

我们已经制作了向盲人展示图形和图像的系统。我们的系统的目的如下1.盲人用计算机图形学我们开发了一种硬拷贝系统，用盲文打印机绘图仪将屏幕上的彩色像素转换成纸上的凸起的点。程序驻留在计算机的内存中，任何时候按下复制键，就会开始制作当前图形屏幕的凸起圆点硬拷贝。通过该系统，(1)盲人可以感觉到电脑屏幕上的图形和颜色，(2)盲人可以自己在电脑屏幕上编写图形程序。2.盲人图像的呈现我们开发了一个原型系统，将自然彩色照片或场景以凸起的网点图像的形式呈现给盲人。原始照片或场景通过图像扫描仪或摄像机存储在计算机内存中，作为数字图像，经过图像处理并转换为盲文纸上的触觉图像。我们对原始图像进行了一些图像处理，通过提取一些属性来简化原始图像。这些经过图像处理的图像被转换成最终的图像，便于盲人理解。

We have made system to present graphics and images to the blind. The purposes of our system are as follows.1. Computer graphics for the blindWe have developed a hard-copy system that translate color pixels on the screen into raised dots on paper by using Braille printer plotter. The program stays resident in computer's memory, and a push of COPY key at any time starts to make a raised dots hard-copy of the current graphic screen. By this system, (1) the blind can feel graphics and colors on the PC's screen, (2) The blind can make graphics program on the PC's screen by himself.2, Presentation of imags for the blindWe have developed a prototype system to present natural color photographs or scenes to the blind as raised dots images. Original photographs or scenes are taken in computer's memory through image scanner or videocamera as digital images, which are image processed and transrated into tactile images on Braille paper. We applied some image-processes to original images to simplify them by extracting some attributes from them. These image-processed images are transformed into final images, which are to be easy to understand for the blind.