实现2D灰度图像的伪彩色计算图像绘制，等值线的计算及绘制，实现连续色和间断色。程序的执行效率较高，用于算法测试验证。-The realization of 2D gray-scale image pseudo-color image rendering, contour calculation and rendering, to achieve continuous color and intermittent color. The program execution efficiency is