Abstract: A method and system for hiding reversible data based on prediction errors are provided, where the method includes: partitioning an image, to obtain a shadow part and a blank part; performing a first-layer embedding process on the shadow part; performing a multi-layer embedding process on the blank part; extracting outermost layer information of the blank part after the multilayer embedding process; and extracting information of the shadow part after the first-layer embedding process. According to the method in the present disclosure, a problem of image distortion during high-capacity data embedding can be effectively solved.

Abstract: A method and system for hiding reversible data based on prediction errors are provided, where the method includes: partitioning an image, to obtain a shadow part and a blank part; performing a first-layer embedding process on the shadow part; performing a multi-layer embedding process on the blank part; extracting outermost layer information of the blank part after the multilayer embedding process; and extracting information of the shadow part after the first-layer embedding process. According to the method in the present disclosure, a problem of image distortion during high-capacity data embedding can be effectively solved.

Abstract: A method of data migration for independent storage device expansion and adaptation is disclosed. The method migrates user data of a first storage unit being pre-expanded or pre-adapted to relevant regions of a second storage unit being post-expanded or post-adapted in multiple batches and includes the following steps. A number corresponding to a start data stripe of the first storage unit is provided in each batch. A data stripe migration quantity is determined. Data stripe user data of the determined data stripe migration quantity subsequent to and including the start data stripe of the first storage unit is duplicated and stored in relevant regions of the second storage unit. Subsequent to duplicating and storing each batch, the original user data of data stripes of the determined data stripe migration quantity subsequent to and including the start data stripe of the first storage unit remains undamaged.

Abstract: A method of data migration for independent storage device expansion and adaptation is disclosed. The method migrates user data of a first storage unit being pre-expanded or pre-adapted to relevant regions of a second storage unit being post-expanded or post-adapted in multiple batches and includes the following steps. A number corresponding to a start data stripe of the first storage unit is provided in each batch. A data stripe migration quantity is determined. Data stripe user data of the determined data stripe migration quantity subsequent to and including the start data stripe of the first storage unit is duplicated and stored in relevant regions of the second storage unit. Subsequent to duplicating and storing each batch, the original user data of data stripes of the determined data stripe migration quantity subsequent to and including the start data stripe of the first storage unit remains undamaged.