This function saves a figure or single axes to one or more vector and/or bitmap file formats, and/or outputs a rasterized version to the workspace, with the following properties: - Figure/axes reproduced as it appears on screen - Cropped border

这是一个实现将BMP位图转换为jpg格式位图的程序，也即具有压缩图像的功能。-This is a BMP bitmap converted to jpg format bitmap program, that has the function of the compressed image.