Patent ID: 7777816

Claim:
An apparatus for image adjustment, the apparatus receiving a first original image frame and a second original image frame which is prior to the first original image frame, the apparatus comprising: a buffer for temporarily storing an adjusted image frame of the second original image frame; an adjustment module, coupled to the buffer, for performing a filtering operation on a first pixel of the first original image frame according to pixel values of both the first pixel and a second pixel of the adjusted image frame of the second original image frame, and outputting an adjusted pixel of the first pixel; and a limiter for receiving the adjusted pixel from the adjustment module and outputting the adjusted pixel according to an upper limit and a lower limit; wherein a location of the second pixel in the adjusted image frame of the second original image frame is corresponding to that of the first pixel in the first original image frame; wherein the filtering operation achieves one of the following: enhancing, reducing, and maintaining the contrast of the first pixel; and wherein if a current value of the adjusted pixel lies between the upper limit and the lower limit, the adjusted pixel is outputted according to the current value; if the current value is larger than the upper limit, the adjusted pixel is outputted according to the upper limit; and if the current value is smaller than the lower limit, the adjusted pixel is outputted according to the lower limit.