Patent ID: 7697073

Claim:
An image processing system comprising: first means for providing a first set of scan lines in a first field of image data, said first means including a first buffer; second means for providing a second set of scan lines in a second field of image data, said second set of scan lines being interlaced relative to said first set of scan lines, said second means including a second buffer; third means for providing a line by line correlation between said first set of scan lines and said second set of scan lines and providing an error in response thereto, said third means including a line-to-line correlator, said correlation being: C = ∑ n = - S S ⁢ ∑ m = F L ⁢ ( A m ) ⁢ ( B mn - B _ n ) [ 1 ] where A=a line from field 1 ; B=a line from field 2 ; B n =the average of line B; C=the cross-correlation; S=maximum pixel shift; F=(first pixel of the line)+S; L=(last pixel of the line)−S; m=pixel number in each line; and n=line number; and fourth means for adjusting said second set of scan lines in response to said error to correct for skew or blur in said second field of image data.