基于内容的图象检索系统代码图片预处理是为了使图片归一化，归一化的目的是将每幅原始图像调整到相同的尺寸和对应位置，从而消除平移、缩放和旋转对于图像鉴别的影响以方便对图片进行的特征提取。-Content-Based Image Retrieval System code image preprocessing is to enable the picture normalized, normalized objective is to adjust each piece of the origina