adjusting a formation position of {HEAD ~ the latent image} based on {TAIL ~ the results} of the detection, 
adjusting a formation position of { HEAD ~ the latent image } based on { TAIL ~ the results } of the detection ,
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH