灰度图转换，可以把彩色图片转换为灰度图片。并进行计算-Grayscale conversion, color images can be converted to gray-scale image. And calculated

把256色图片转为256级灰度图。内有测试图片。本程序在xpsp3下测试通过。-The 256 256-color image into grayscale. There are test images. This program xpsp3 under test.

java GUL编程，java的图像界面编程，实现了从本地读取图片并显示，把图片转为二值图片和灰度图片-java GUL coding,read the pictures and display it,handle it to gray or binary picyures and save it to local file packages