中文说明：将LaTeX的符号在matlab中转换成为图像， 并显示在当前的图像上. 这个功能对于在matlab中使用大量LaTeX符号的图像有极其方便的处理作用.
English Description：
The symbol of latex is transformed into an image in MATLAB and displayed on the current image. This function is very convenient for the image with a large number of latex symbols in MATLAB