roi region of interest.
sv_ip_copy new: ip_float data_in=`car_ip' data_type=ipFLOAT ;
sv_ip_display new: car_image2 data_in=`ip_float' title= `... converted to floating point pixels ...' render! ;
sv_ip_mul_const new: scale data_in=`ip_float' constant= 1.572 ;
sv_ip_display new: car_image3 data_in=`scale' title= `... multiplied by 1.572 ...' render! ;
sv_ip_copy new: ip_byte data_in=`scale' data_type=ipBYTE ;
sv_ip_display new: car_image4 data_in=`ip_byte' title= ` ...converted back to byte pixels' render! ;