Information processing device, information processing system, information processing method, and program

1. An information processing device comprising:

an image acquisitor that acquires an image acquired by imaging an actual space, the image including a plurality of subjects each of which includes a respective attribute;

an information amount reduction degree determiner that determines, for each attribute, a respective degree of appearance of subjects having its attribute shown in the image, the respective degree of appearance of each attribute corresponding to a respective number of subjects having each attribute appearing in the image; the information amount reduction degree determiner adjusts, for each attribute, a respective degree of reduction of an amount of information of a respective subject based on its respective degree of appearance of the attribute, so that the degree of reduction of the amount of information is smaller as the respective degree of appearance is greater and so that the degree of reduction of the amount of information is larger as the respective degree of appearance is smaller; and

an information amount reducer that generates information reduced data acquired by reducing at least a part of the amount of information of the image in accordance with the degree of reduction of the amount of information determined by the information amount reduction degree determiner.

2. The information processing device according to claim 1 , further comprising:

a first feature quantity calculator that calculates an information reduced feature quantity representing a feature quantity of the subject from the information reduced data; and

a first collator that collates the information reduced feature quantities.

3. The information processing device according to claim 2 , further comprising:

a transmitter that transmits the information reduced feature quantity to the server through a communication network.

4. The information processing device according to claim 1 ,

wherein the information amount reduction degree determiner determines the degree of reduction of the amount of information on the basis of an attribute of each of one or more partial images of the image, and

wherein the information amount reducer generates the information reduced data acquired by reducing the amount of information of the partial image in accordance with the degree of reduction of the amount of information of each partial image.

5. The information processing device according to claim 1 , wherein the information amount reducer generates the information reduced data according to the degree of reduction of the amount of information from the image and further generates the information reduced data according to a degree of reduction of the amount of information higher than this degree of reduction of the amount of information.

6. The information processing device according to claim 1 ,

wherein the image acquisitor has a function of storing the image, and

wherein, in a case in which the information amount reduction degree determiner changes the degree of reduction of the amount of information on the basis of the attribute of the subject shown in the image, the information amount reducer generates the information reduced data acquired by reducing at least a part of the amount of information of the stored image in accordance with the degree of reduction of the amount of information changed by the information amount reduction degree determiner.

7. The information processing device according to claim 1 , further comprising:

a second feature quantity calculator that calculates a feature quantity before reduction of the amount of information representing a feature quantity of the subject from the image before reduction of the amount of information using the information amount reducer; and

a second collator that collates the feature quantities before reduction of the amount of information,

wherein the information amount reduction degree determiner determines the degree of reduction of the amount of information on the basis of a result of collation between the attribute of the subject shown in the image and the feature quantity before reduction of the amount of information.

8. The information processing device according to claim 1 ,

wherein the information reduction degree is a blurring intensity at the time of reducing the amount of information by blurring the image, and

wherein the information reduction data is image data acquired by performing blurring processing of at least a part of the image with this blurring intensity.

9. The information processing device according to claim 2 , further comprising:

a terminal including the image acquisitor, the information amount reduction degree determiner, the information amount reducer, and the first feature quantity calculator; and

a server including the first collator,

wherein the terminal transmits the information reduced feature quantity calculated from the information reduced data to the server, and

wherein the server receives the information reduced feature quantity from the terminal.

10. The information processing device according to claim 9 ,

wherein the terminal further includes:

a second feature quantity calculator that calculates a feature quantity before reduction of the amount of information representing the feature quantity of the subject from the image; and

a second collator that collates the feature quantities before reduction of the amount of information.

11. An information processing system comprising:

a terminal; and

a server, wherein the terminal includes:

an image acquisitor that acquires an image acquired by imaging an actual space, the image including a plurality of subjects each of which includes a respective attribute;

an information amount reduction degree determiner that determines, for each attribute, a respective degree of appearance of subjects having its attribute shown in the image, the respective degree of appearance of each attribute corresponding to a respective number of subjects having each attribute appearing in the image; the information amount reduction degree determiner adjusts, for each attribute, a respective degree of reduction of an amount of information of a respective subject based on its respective degree of appearance of the attribute, so that the degree of reduction of the amount of information is smaller as the respective degree of appearance is greater and so that the degree of reduction of the amount of information is larger as the respective degree of appearance is smaller;

an information amount reducer that generates information reduced data acquired by reducing at least a part of the amount of information of the image in accordance with the degree of reduction of the amount of information determined by the information amount reduction degree determiner;

a feature quantity calculator that calculates an information reduced feature quantity representing a feature quantity of the subject from the information reduced data; and

a transmitter that transmits the information reduced feature quantity to the server through a communication network, wherein the server includes:

a receiver that receives the information reduced feature quantity transmitted from the server; and

a collator that collates the information reduced feature quantities received by the receiver.

12. An information processing method using an information processing device, the information processing method comprising:

acquiring an image acquired by imaging an actual space, the image including a plurality of subjects each of which includes a respective attribute;

determining, for each attribute, a respective degree of appearance of subjects having its attribute shown in the image, the respective degree of appearance of each attribute corresponding to a respective number of subjects having each attribute appearing in the image;

adjusting, for each attribute, a respective degree of reduction of an amount of information of a respective subject based on its respective degree of appearance of the attribute, so that the degree of reduction of the amount of information is smaller as the respective degree of appearance is greater and so that the degree of reduction of the amount of information is larger as the respective degree of appearance is smaller; and

generating information reduced data acquired by reducing at least a part of the amount of information of the image in accordance with the determined degree of reduction of the amount of information.

13. A non-transitory computer readable storage medium that stores computer program for causing a computer to execute:

acquiring an image acquired by imaging an actual space by using an image acquisitor, the image including a plurality of subjects each of which includes a respective attribute;

determining, for each attribute, a respective degree of appearance of subjects having its attribute shown in the image, the respective degree of appearance of each attribute corresponding to a respective number of subjects having each attribute appearing in the image;

adjusting, for each attribute, a respective degree of reduction of an amount of information of a respective subject based on its respective degree of appearance of the attribute, so that the degree of reduction of the amount of information is smaller as the respective degree of appearance is greater and so that the degree of reduction of the amount of information is larger as the respective degree of appearance is smaller; and

generating information reduced data acquired by reducing at least a part of the amount of information of the image in accordance with the determined degree of reduction of the amount of information.