SDH.py 文件源码

def EvalSHD(data,model):
    dataNum,dataDim=data.shape
    distToAnchors=cdist(model["anchorData"], data,'euclidean')
    sigmaRBF=model["sigmaRBF"]
    phi=npy.exp(-npy.square(distToAnchors)/sigmaRBF/sigmaRBF/2)
    matP=model["matProj"]
    projData=npy.dot(matP.T,phi)
    code=npy.ones(projData.shape,dtype=npy.int32)
    code[projData<0]=-1
    if 0==code.shape[0]%8:
        codeByteNum=code.shape[0]/8
    else:
        codeByteNum=1+code.shape[0]/8
    compactCode=npy.zeros((code.shape[1],codeByteNum),dtype=npy.uint8)
    for kk in range(code.shape[0]):
        idxByte=kk/8
        idxBit=kk%8
        compactCode[code[kk,:]==1,idxByte]+=(1<<idxBit)
    return compactCode