def cal(base_block,i,j):
    
    std=np.std(base_block)
    dist=np.max(base_block)-np.min(base_block)
    return  [i,j,std,dist]


plist=[]
with Pool() as pool:
    for i in range(height):
        print("\r",i,"/",height,"          ",end="")
        if i<50 or i>height-51:
            continue
        for j in range(width):
            if j<50 or j>width-51:
                continue
            base_block=data[i-50:i+50,j-50:j+50]
            plist.append(pool.apply_async(cal,args=(base,i,j,)))
    pool.close()
    pool.join()
    for p in plist:
        result=p.get()
        [i,j,std,dist]=result
        base_std[i,j]=std
        base_dist[i,j]=dist     

base_std.astype(np.float32).tofile(r"D:\MicroSAR\C-SAR\Ortho\Ortho\Temporary\HH_std.bin")
base_dist.astype(np.float32).tofile(r"D:\MicroSAR\C-SAR\Ortho\Ortho\Temporary\HH_dist.bin")
print(base_dist.shape,base_dist.dtype)