Image motion display method and apparatus

• US 7,777,780 B2
• Filed: 08/22/2007
• Issued: 08/17/2010
• Est. Priority Date: 09/03/2003
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Oya, Takashi, Fukasawa, Toshihiko
• Primary Examiner(s): SELBY, GEVELL V
• Application Number:
  US11/843,311
• Publication Number:
  US 20080024612A1
• Time in Patent Office: 1,091 Days
• Field of Search: 348152-154, 348/169, 34820801-20804
• US Class Current: 348/208.1
• 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: G08B 13/19602 Image analysis to detect motion of the intruder, e.g. by frame subtraction
• CPC Class Codes: G08B 13/19604 involving reference image or background adaptation with time to compensate for changing conditions, e.g. reference image update on detection of light level change
• CPC Class Codes: G08B 13/19667 Details realated to data compression, encryption or encoding, e.g. resolution modes for reducing data volume to lower transmission bandwidth or memory requirements
• CPC Class Codes: G08B 13/19669 Event triggers storage or change of storage policy
• CPC Class Codes: G08B 13/19671 Addition of non-video data, i.e. metadata, to video stream
• CPC Class Codes: G08B 13/19676 Temporary storage, e.g. cyclic memory, buffer storage on pre-alarm
• CPC Class Codes: G08B 13/1968 Interfaces for setting up or customising the system
• CPC Class Codes: G08B 13/19682 Graphic User Interface [GUI] presenting system data to the user, e.g. information on a screen helping a user interacting with an alarm system
• CPC Class Codes: G08B 13/19691 Signalling events for better perception by user, e.g. indicating alarms by making display brighter, adding text, creating a sound
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/28 by using information signals recorded by the same method as the main recording G11B27/22 takes precedence
• CPC Class Codes: G11B 27/3045 superimposed on the recorded main signal, e.g. burn-in-time code
• CPC Class Codes: G11B 27/34 Indicating arrangements indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D
• CPC Class Codes: H04N 5/76 Television signal recording
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/77 between a recording apparatus and a television camera
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• CPC Class Codes: H04N 7/181 : for receiving images from a plurality of remote sources
• CPC Class Codes: H04N 9/8042 : involving data reduction
• CPC Class Codes: H04N 9/8047 : using transform coding

Abstract

In a display apparatus connected to an image processing apparatus which detects the change amount in an input image and stores, as a detected image, an image during a period with a change amount equal to or more than a predetermined amount, the change log of the change amount and the detected image are received, the change log is displayed by using a graph, and information related to the detected image is displayed on the graph in a superposed manner.

Claims

1. An image motion detection apparatus comprising:

an image display device which displays a moving image;

a period designation device which designates, in accordance with user operation, a first period in which motion is present in the moving image displayed by said image display device and a second period in which no motion is present;

an upper/lower limit value determination device which determines an upper limit value and a lower limit value of a threshold value on the basis of a change amount in the moving image during the first period with respect to a predetermined reference image and a change amount in the moving image during the second period with respect to the predetermined reference image;

a threshold value determination device which determines an arbitrary threshold value in accordance with user operation within a range from the upper limit value to the lower limit value of the threshold value, which are determined by said upper/lower limit value determination device; and

a motion detection device which detects motion in the moving image on the basis of the threshold value determined by said threshold value determination device and the change amount in the moving image with respect to the predetermined reference image.

2. The apparatus according to claim 1, further comprising a change amount shift display device which displays a shift situation of the change amount in the moving image with respect to the predetermined reference image.

3. The apparatus according to claim 2, further comprising a period change device which changes at least one of the first period and the second period in accordance with user operation near the shift situation of the change amount which is displayed by said change amount shift display device.

4. The apparatus according to claim 1, further comprising a detection target region setting device which sets an image region as a motion detection target of said motion detection device on the basis of the moving image during the first period.

5. The apparatus according to claim 4, wherein said detection target region setting device sets an image region in which motion is detected from the moving image during the first period as the image region as the motion detection target of said motion detection device.

6. The apparatus according to claim 1, further comprising a threshold value determination range display device which displays the upper limit value and the lower limit value determined by said upper/lower limit value determination device.

7. The apparatus according to claim 1, wherein said motion detection device detects the motion in the moving image when the change amount in the moving image with respect to the predetermined reference image is not less than the threshold value or when the change amount in the moving image with respect to the predetermined reference image exceeds the threshold value.

8. The apparatus according to claim 1, further comprising a representative image display device which displays a representative image during at least one of the first period and the second period.

9. The apparatus according to claim 1, wherein said period designation device designates the first period and the second period from a live image.

10. The apparatus according to claim 1, wherein said period designation device designates the first period and the second period from the moving image accumulated by said accumulation device.

11. An image motion detection method by an image motion detection apparatus which detects motion in a moving image, comprising:

an image display step of displaying a moving image;

a period designation step of designating, in accordance with user operation, a first period in which motion is present in the displayed moving image and a second period in which no motion is present;

an upper/lower limit value determination step of determining an upper limit value and a lower limit value of a threshold value on the basis of a change amount in the moving image during the first period with respect to a predetermined reference image and a change amount in the moving image during the second period with respect to the predetermined reference image;

a threshold value determination step of determining an arbitrary threshold value in accordance with user operation within a range from the upper limit value to the lower limit value of the threshold value, which are determined; and

a motion detection step of detecting motion in the moving image on the basis of the determined threshold value and the change amount in the moving image with respect to the predetermined reference image.

12. A computer-readable storage medium which stores a program which causes a computer to execute an image motion detection method by an image motion detection apparatus which detects motion in a moving image, the storage medium storing a program comprising program codes corresponding to

an image display step of displaying a moving image;

a period designation step of designating, in accordance with user operation, a first period in which motion is present in the displayed moving image and a second period in which no motion is present;

an upper/lower limit value determination step of determining an upper limit value and a lower limit value of a threshold value on the basis of a change amount in the moving image during the first period with respect to a predetermined reference image and a change amount in the moving image during the second period with respect to the predetermined reference image;

a threshold value determination step of determining an arbitrary threshold value in accordance with user operation within a range from the upper limit value to the lower limit value of the threshold value, which are determined; and

a motion detection step of detecting motion in the moving image on the basis of the determined threshold value and the change amount in the moving image with respect to the predetermined reference image.

13. An image motion detection apparatus comprising:

an image display device which displays a moving image;

a start instruction device which instructs a start of automatic setting of sensitivity; and

a threshold value determination device which obtains, on the basis of a plurality of frames, a change amount in the moving image with respect to a predetermined reference image in a state in which the image is assumed to have no motion in response to the instruction of automatic setting by said start instruction device and determines a threshold value for motion detection from the obtained change amount,

wherein said threshold value determination device obtains, as the threshold value, a value obtained by calculating an average value of different value sets of the frames except a predetermined amount on upper and lower sides and adding a predetermined offset to an average difference value of average values of the difference values of the plurality of frames except a predetermined amount on upper and lower sides.

14. The apparatus according to claim 13, further comprising an interrupt device which interrupt automatic sensitivity setting when a camera parameter changes during automatic sensitivity setting, and an interrupt display device which displays the interrupt.

15. The apparatus according to claim 14, wherein the camera parameter is at least one of a camera photographing position, pan, tilt, zoom, focus, aperture, exposure, shutter speed, and white balance.

16. An image motion detection apparatus comprising:

an image display device which displays a moving image;

a start instruction device which instructs a start of automatic setting of sensitivity; and

a threshold value determination device which obtains, on the basis of a plurality of frames, a change amount in the moving image with respect to a predetermined reference image in a state in which the image is assumed to have no motion in response to the instruction of automatic setting by said start instruction device and determines a threshold value for motion detection from the obtained change amount,

further comprising a threshold value setting device which displays sensitivity which is inversely proportional to the threshold value, and indirectly sets the threshold value by causing a user to set the sensitivity.

17. The apparatus according to claim 16, further comprising a sensitivity setting device which reflects a result of automatic sensitivity setting on the sensitivity display.