图像直方图，灰度拉伸，预置变换，窗口变换等-Image histogram, gray stretch, pre-transform, transform, such as window

(1)仅调用系统的画点函数，绘制直线、圆、椭圆、圆角矩形、正三角形等；（2）可改变线型、线宽、线色，可对图形进行平移，拉伸，放大，缩小，镜像等；（3）可保存，打开绘图-(1) only point of calling the system function of painting, drawing lines, circles, ellipses, rounded rectangles, triangles and so on (2) can change the line type, li

块拉伸程序，模拟stretch（拉伸）命令对块拉伸 作者：langjs 　　　　命令：KLS 　-Block stretching program to simulate stretch (tension) command block stretch Of: langjs