Methods: The structures of DICOM image and BMP one were analyzed;the data of DICOM image were read with the window displayed;plumb mirror were transformed and memorized in the format of BMP image.

• 方法分析DICOM图像和BMP图像文件格式，读取DICOM图像数据并进行加窗显示、垂直镜像变换，以BMP格式存储。