在N6的例程里面实现了把imx335的2592x1944下采样到800x480，但是这里的参数配置是怎么计算出来的，还有如果我想要把这个配置为224*160的话，我得怎么修改？

/ Configure the downsize /

DonwsizeConf.HRatio = 25656;

DonwsizeConf.VRatio = 33161;

DonwsizeConf.HSize = 800;

DonwsizeConf.VSize = 480;

DonwsizeConf.HDivFactor = 316;

DonwsizeConf.VDivFactor = 253;

if(HAL_DCMIPP_PIPE_SetDownsizeConfig(&hdcmipp, DCMIPP_PIPE1, &DonwsizeConf) != HAL_OK)

{

Error_Handler(); }

if(HAL_DCMIPP_PIPE_EnableDownsize(&hdcmipp, DCMIPP_PIPE1) != HAL_OK)

{

Error_Handler(); }