把图片的像素值rgb 通过rgb转hsv函数 转换为按图表（里面图片的数值）， 输出文本，可以在画图软件里绘制图像，转换文本后当作速度场或电介质场在fdtd模拟中调用。-The image pixel value rgb by rgb hsv transfer function Converted according to the chart (the value inside the picture) output, Output text, drawing softwar

图形学画直线方法，基于VC的直线光栅扫描转换算法实现。分别实现数值微分算法和Bresenham算法。-Graphics drawing a straight line method, based on VC convert raster scan line algorithm. Respectively, to achieve numerical differentiation algorithm and Bresenham algorithm.