图像处理技术已经渗透到人类生活的各个领域并得到越来越多的应用，图像处理所涉及的图像格式有很多种，如TIF、JEMP、BMP等等，工程应用中经常要处理256级的灰度BMP图像，如通过黑白采集卡采集得到的图像-image processing technology has been integrated into all areas of life and to be more and more applications, image processing involved in the forma