本论文主要讲述了图像文件（bmp）文件格式下中简单图形的识别，主要是直线和圆的识别，这在工程图的识别和其他领域中都有很多的应用。-This paper focuses on the image file (BMP) recognition simple graphics file format, is a straight line and circle recognition, which have many applications in the recognition of engineering drawings and other fields.