People take many photos easily now. It is very common to use slideshow to view a series of images. The purpose of this study is to design a new slideshow effect, which considers viewer attention. It transfers images smoothly for comfortable viewing. The proposed slideshow system utilizes repetitive appeared objects in an image set. It strengthens the concept of temporal Region of Interest. It can emphasize repetitive appeared objects by creating a smooth path among them. The method we use is based on energy minimization, which is very flexible and widely-used. We can simulate many other slideshow effects with parameter tuning and slight energy term modification.