| 摘要 |
A sample key signal frame 602 and/or a sample image frame 601 are stored showing a detailed element 101 at a first resolution (e.g. a zoomed-in image). A current image frame 71 includes the same detailed element 101 at a second, lower, resolution (e.g. a wide-angle image). The sample 601, 602 may be scaled to match a target area 10,14 within the current image, and is used to perform an image enhancement process which enhances the detailed element within an enhanced modified image frame 74 using fill content from the sample image frame. The fill content may overlay the content of the current image frame according to a variable transparency factor. Thus, a more photo-realistic image may achieved which is suitable for providing targeted advertisements on billboards displayed during live sports television broadcasts. |
