A method operable by an image processing device, the method comprising: storing a first image frame in a buffer of the device, the first image frame corresponding to a previously received image frame and comprising a first plurality of image tiles; receiving a second image frame, the second image frame comprising a second plurality of image tiles; determining which tiles of the second plurality are to be processed by an image signal processor, ISP, based on: identifying a first image tile of the first plurality that corresponds to a second image tile of the second plurality; comparing the first image tile and the second image tile and determining a dissimilarity value between the first image tile and the second image tile; in response to a determination that the dissimilarity value between the first image tile and the second image tile meets a tile threshold, designating the second image tile as a delta tile to be processed by the ISP; characterized in that in response to a determination that a number of tiles of the second plurality designated as delta tiles has reached a frame threshold limit, not performing the comparison for a remainder of the image tiles, such that the remainder of the second plurality of image tiles are all designated to be processed by the ISP. storing a first image frame in a buffer of the device, the first image frame corresponding to a previously received image frame and comprising a first plurality of image tiles; receiving a second image frame, the second image frame comprising a second plurality of image tiles; determining which tiles of the second plurality are to be processed by an image signal processor, ISP, based on: identifying a first image tile of the first plurality that corresponds to a second image tile of the second plurality; comparing the first image tile and the second image tile and determining a dissimilarity value between the first image tile and the second image tile; in response to a determination that the dissimilarity value between the first image tile and the second image tile meets a tile threshold, designating the second image tile as a delta tile to be processed by the ISP; characterized in that in response to a determination that a number of tiles of the second plurality designated as delta tiles has reached a frame threshold limit, not performing the comparison for a remainder of the image tiles, such that the remainder of the second plurality of image tiles are all designated to be processed by the ISP. identifying a first image tile of the first plurality that corresponds to a second image tile of the second plurality; comparing the first image tile and the second image tile and determining a dissimilarity value between the first image tile and the second image tile; in response to a determination that the dissimilarity value between the first image tile and the second image tile meets a tile threshold, designating the second image tile as a delta tile to be processed by the ISP; characterized in that in response to a determination that a number of tiles of the second plurality designated as delta tiles has reached a frame threshold limit, not performing the comparison for a remainder of the image tiles, such that the remainder of the second plurality of image tiles are all designated to be processed by the ISP. <EOS>