对BMP格式图片进行颜色处理 具体包括：颜色位数转换、彩色－灰度转换、颜色调整、亮度/对比度调整、颜色分离、颜色滤除等。-BMP format picture to deal with the specific color include: the median color conversion, color- gray-scale conversion, color adjustment, brightness/contrast adjustment, color separation,