Image data processing apparatus and image data processing method

1. An image-data processing apparatus comprising:

an imaging unit configured to capture a moving image of a subject and generate image data; and

a processor programmed to

extract a visual feature from the generated image data,

detect a face of a person,

determine an identity of a person and whether the person is a child or an adult based on the detected face, the detection and determining result being included in the visual feature;

compare a corresponding visual feature, extracted from recorded image data in a recording medium and related to the recorded image data with the extracted visual feature,

read image data having the extracted visual feature from the recording medium based on the comparison result, and

concatenate, into a concatenated moving image file, all image data having the extracted visual feature.

2. The image-data processing apparatus according to claim 1 , wherein the processor is further programmed to

perform at least one of a face detection, a face attribute detection, a person identification, or a human body detection using the face detection result, and

include an obtained result in the visual feature.

3. The image-data processing apparatus according to claim 1 , wherein the processor is further programmed to extract the visual feature on the basis of preset information identifying a particular visual feature to be extracted.

4. The image-data processing apparatus according to claim 3 , wherein the processor is further programmed to

use imaging information different from the preset information,

compare the imaging information related to the generated image data with imaging information related to the image data recorded in the recording medium, and

read the image data indicating imaging information related to the extracted visual feature and the generated image data from the recording medium on the basis of the comparison result.

5. The image-data processing apparatus according to claim 1 , wherein the processor is further programmed to

record the image data generated by the imaging unit onto the recording medium, and

record the extracted visual feature in association with the image data.

6. A method of processing image data, comprising:

capturing a moving image of a subject and generating image data;

extracting a visual feature from the generated image data;

detecting a face of a person;

determining an identity of a person and whether the person is a child or an adult based on the detected face, the detection and determining result being included in the visual feature;

comparing a corresponding visual feature, having been extracted from recorded image data in a recording medium, with the extracted visual feature;

reading image data having the extracted visual feature from the recording medium based on the comparison result; and

concatenating, into a concatenated moving image file, all image data having the visual feature.

7. A non-transitory computer readable medium having computer readable instructions thereon that when executed by a computer cause the computer to perform an image display method comprising:

capturing a moving image of a subject and generating image data;

extracting a visual feature from the generated image data;

detecting a face of a person;

determining an identity of a person and whether the person is a child or an adult based on the detected face, the detection and determining result being included in the visual feature;

comparing a corresponding visual feature, having been extracted from recorded image data in a recording medium, with the extracted visual feature;

reading image data having the extracted visual feature from the recording medium based on the comparison result; and

concatenating, into a concatenated moving image file, all image data having the visual feature.

8. The image-data processing apparatus according to claim 2 , wherein the face attribute detection is at least one of a face validity detection, a yaw angle detection, a gender detection, a smile detection, and a blink detection.

9. The image-data processing apparatus according to claim 2 , wherein the human-body detection detects at least one of a left shoulder position, a right shoulder position, a left elbow position, a right elbow position, a left hand position, a right hand position, a waist position, a left knee position, and a right knee position.

10. The image-data processing apparatus according to claim 9 , wherein the human-body detection result determines X-coordinates and Y-coordinates identifying distances from the center of the face to at least one of a left shoulder position, a right shoulder position, a left elbow position, a right elbow position, a left hand position, a right hand position, a waist position, a left knee position, and a right knee position.

11. The image-data processing apparatus according to claim 1 , wherein the concatenating is in an order of recording times of the all image data having the visual feature.

12. The image-data processing apparatus according to claim 2 , wherein the concatenating is in an order of recording times of the all image data having the visual feature.

13. The image-data processing apparatus according to claim 1 , wherein the processor is further programmed to

perform a face detection, a face attribute detection, a person identification, and a human body detection using the face detection result, and

include an obtained result in the visual feature.

14. The image-data processing apparatus according to claim 1 , wherein only image data having the extracted visual feature is concatenated into the concatenated moving image file.