Numpy——将二维图像矩阵转换为一维向量

以下的例子，将32x32的二维矩阵，装换成1x1024的向量

def image2vector (filename):
    returnVect=zeros((1,1024))
    f=open(filename)
    for i in range (32):
        lineStr =fr.readline()
        for j in range (32):
            returnVect[0,32*i*j]=int(lineStr[j])
    return returnVect