Image access management device, image access management method, and image access management system

An image access management method executed by an image access management device for managing access to an image, wherein

• the image access management device includes a feature calculation unit, an access management unit, and an image generation unit, and
• the image access management method comprises:
• a step of extracting a feature vector related to a predetermined region in a target image, by the feature calculation unit;
• a step of determining a browsing level with respect to the target image according to an access authority or purpose included in the access request to the target image, in a case where the image access management device receives an access request to the target image, by the access management device;
• a step of generating a final image that corresponds to the access authority by processing the feature vector according to the browsing level, by the image generation unit;
• and
• a step of providing the final image as a response to the access request, wherein
• the image generation unit includes a dimension adjusting unit and an inference unit, and
• the step of generating the final image includes
• a step of performing processing for reducing an information amount of the feature vector according to the browsing level, by the dimension adjusting unit,
• a step of deriving inference related to the feature vector based on the feature vector having the reduced information amount, by the inference unit, and
• a step of generating the final image based on the feature vector having the reduced information amount and the inference, by the image generation unit.

An image access management system for managing access to an image, the system comprising:

• an image access management device including a feature calculation unit, an access management unit, and an image generation unit;
• a sensor device that acquires a target image;
• and
• a client terminal that creates and sends an access request to the target image, wherein
• the image access management device, the sensor device, and the client terminal are connected to each other via a network,
• the feature calculation unit acquires the target image from the sensor device and extracts a feature vector related to a predetermined region in the target image,
• in a case where the image access management device receives an access request to the target image from the client terminal, the access management unit determines a browsing level with respect to the target image according to an access authority or purpose included in the access request to the target image, wherein
• the image generation unit includes a dimension adjusting unit and an inference unit,
• the dimension adjusting unit performs processing of reducing an information amount of the feature vector according to the browsing level,
• the inference unit derives inference related to the feature vector based on the feature vector having the reduced information amount, and
• the image generation unit generates a final image (1) that corresponds to the access authority by processing the feature vector according to the browsing level, and provides the generated final image as a response to the access request from the client terminal and (2) based on the feature vector having the reduced information amount and the inference.