Computer-readable recording medium, detecting method, and detecting apparatus detecting an amount of image difference

• US 9,684,969 B2
• Filed: 12/18/2014
• Issued: 06/20/2017
• Est. Priority Date: 01/07/2014
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Sakai, Miho, Oguchi, Atsushi
• Primary Examiner(s): Werner, Brian P
• Application Number:
  US14/574,509
• Publication Number:
  US 20150193670A1
• Time in Patent Office: 915 Days
• Field of Search: None
• CPC Class Codes: G06T 2207/30221 Sports video; Sports image
• CPC Class Codes: G06T 7/20 Analysis of motion motion estimation for coding, decoding, compressing or decompressing digital video signals H04N19/43, H04N19/51
• CPC Class Codes: G06V 40/20 Movements or behaviour, e.g. gesture recognition recognition of facial expressions G06V40/16

Abstract

A detection method by which a computer to execute the following processes: The detection program causes the computer to execute a process of detecting times at which a timelike change amount temporarily decreases in a plurality of images that are sequentially taken. The detection program also causes the computer to execute a process of extracting, on the basis of the detected times, either a movement of beating time of a person included in the taken images or times at which the person included in the taken images beats time.

Claims

1. A non-transitory computer-readable recording medium that stores therein a detection program that causes a computer to execute a process comprising:

obtaining, for each of a plurality of taken images that are sequentially taken, a difference between a taken image and at least one taken image taken prior to the taken image;

detecting times at which a change amount temporarily decreases in the plurality of images, on a basis of a result of comparing differences between the plurality of taken images obtained at the obtaining; and

extracting a time at which a person beats rhythm from the detected times at the detecting, when difference amounts obtained at the obtaining keep decreasing from an image taken earlier than the image at the detected time by a predetermined quantity of images prior to the image at the detected time, and keep increasing from the image at the detected time subsequent to an image taken later than the image at the detected time by a predetermined quantity of images.

2. The non-transitory computer-readable recording medium according to claim 1, wherein

the obtaining obtains, for each of the plurality of taken images, a difference between the taken image and an image obtained by accumulating taken images taken prior to the taken image.

3. The non-transitory computer-readable recording medium according to claim 1, wherein

the detecting detects the times at which the change amount temporarily decreases such as a time at which an image having a smaller difference amount is taken, compared to other images taken at image taking times before and after a predetermined time.

4. A detecting method by which a computer executes a process comprising:

obtaining, using a processor, for each of a plurality of taken images that are sequentially taken, a difference between a taken image and at least one taken image taken prior to the taken image;

detecting, using a processor, times at which a change amount temporarily decreases in the plurality of images, on a basis of a result of comparing differences between the plurality of taken images obtained at the obtaining; and

extracting, using a processor, a time at which a person beats rhythm from the detected times at the detecting, when difference amounts obtained at the obtaining keep decreasing from an image taken earlier than the image at the detected time by a predetermined quantity of images prior to the image at the detected time, and keep increasing from the image at the detected time subsequent to an image taken later than the image at the detected time by a predetermined quantity of images.

5. A detecting apparatus comprising:

a processor, wherein the processor executes a process comprising;

obtaining for each of a plurality of taken images that are sequentially taken, a difference between a taken image and at least one taken image taken prior to the taken image;

detecting times at which a change amount temporarily decreases in the plurality of images, on a basis of a result of comparing differences between the plurality of taken images obtained at the obtaining; and

extracting a time at which a person beats rhythm from the detected times at the detecting, when difference amounts obtained at the obtaining keep decreasing from an image taken earlier than the image at the detected time by a predetermined quantity of images prior to the image at the detected time, and keep increasing from the image at the detected time subsequent to an image taken later than the image at the detected time by a predetermined quantity of images.