Face recognition systems aim to recognize the identity of a person depicted in a photograph by comparing it against a gallery of prerecorded images. Current systems perform quite well in controlled scenarios, but they allow for none or little interaction in case of mistakes due to the low quality of images or to algorithmic limitations. Following the needs and suggestions of investigators, we present a guided user interface that allows to adjust from a fully automatic to a fully assisted modality of execution, according to the difficulty of the task and to amount of available information (gender, age, etc.): the user can generally rely on automatic execution and intervene only on a limited number of examples when a failure is automatically detected or when the quality of intermediate results is deemed unsatisfactory. The interface runs on top of a preexistent automatic face recognition algorithm in such a way to guarantee full control over the execution flow and to exploit the peculiarities of the underlying image processing techniques. The viability of the proposed solution is tested on a classic face identification task run on a standard publicly available database (the XM2VTS), assessing the improvement to user interaction over the automatic system performance. 相似文献
China’ economic boom has produced a surging appetite for fossil fuels, particularly oil. To foster and sustain its economic development, China has taken a series of steps to quench its thirst for energy. The most striking measure is its high-profile oil diplomacy, centering on the goal of gaining more secure national control of overseas oil and gas supplies. Why has China chosen oil diplomacy over directly purchasing oil on the international market? And why does one prefer direct control of oil and gas? This paper attempts to address China’s motivations from the perspectives of both the central government and the national oil companies (NOCs). It is argued that China’s oil diplomacy has been driven not only by the government’s learning skill and strategic concerns, but also by the NOCs’ strong commercial motives to expand business abroad and their management’s personal incentive. Although both actors have common stakes in securing oil and gas from abroad, this by no means can guarantee that the NOCs will obediently follow state orders.