JPH11136605A - Method and system for reproducing stored video image - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the method and the system for reproducing a stored video image where changeover of a video image is not sensed by a viewer by decreasing the difference between the stored image and a raw video image in the case of selecting the raw video image or the stored video image. SOLUTION: A video image from a TV camera 1 is given to a video output device 3 via a display video changeover 2 and displayed on a video output screen 4, the input video image is stored in a video storage device 5, binarized by a binarization processing circuit 6 and a silhouette image is stored in a video storage device 7. A silhouette image comparator 8 compares the similarity between the binarized silhouette image and the silhouette image stored in a video image storage device 7, reads the video image with highest similarity from the video image storage device 5 and allows the read image to be displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for playing back stored images, and more particularly to a method and apparatus for playing back stored images when a special effect is applied to an image in an art image work or the like. .

[0002]

2. Description of the Related Art When sequentially reproducing images stored in a laser disk, a video tape, or an LSI memory, it is possible to designate a reproduced image by using a frame number or the like of the stored image by an index previously assigned to the image. Is being done. For example, in the case of storing / reproducing a television image by an NTSC signal, a number is given in frame units every 1/30 second. At the time of reproduction, when the frame number is designated, the video signal is sequentially read out from the frame of the number and reproduced.

Another method is to search for and reproduce a desired video by words, by associating a frame number with a word in a natural language for which a video is reserved, instead of directly specifying a frame number. There is something. Also, a method for retrieving a moving image scene using a motion key of an object in a moving image on the assumption that the object in the screen is rigid and undeformed is described by Masanori Yoshimitsu et al .: “Moving image retrieval using object motion ”, Information Processing Society of Japan Research Report,
DBS-102, pp. 25-32 (1995). In this method, a scene to be sought is searched by encoding a trajectory of the movement of the center of the object and evaluating a degree of similarity with the trajectory of the movement of the object given by the user.

A method of expressing a motion of an object in a moving image by characters and searching for a scene based on the degree of coincidence with a search key expressing the motion issued by the user is described in Shinji Abe et al. Moving Image Retrieval Method Using Time Display as Key ", IEICE, Vol.
3, pp. 512-519 (1992).

[0005]

In the above-described method of searching for a scene based on the degree of coincidence with a search key, the search key needs to be expressed in words, and the motion of the object is not necessarily expressed in character information. There was a problem that it was not always possible.

[0006] Further, when a live video input by a television camera or the like is displayed, there is a case where the video is switched from a certain point of time to a video stored in advance. In this case, if the difference between the raw video and the reproduced video is significantly different, the viewer will detect the switching of the video.

[0007] Therefore, a main object of the present invention is to reduce the difference between the live video and the stored video so as to prevent the viewer from detecting that the video has been switched. It is an object of the present invention to provide a method and apparatus for reproducing stored video.

[0008]

The invention according to claim 1 is
When presenting a video, searching for an image similar to the video from the stored video and playing back and displaying it, by comparing the silhouette image of the given video with the silhouette image of the stored video, Determine the video to play.

According to a second aspect of the present invention, there is provided a storage video reproducing apparatus, comprising: an imaging unit for capturing a certain video; a display unit for displaying the video; and a first video storage unit for storing a captured video signal. A second video storage unit for binarizing the captured video signal and storing the binary video signal; and a comparing unit for comparing the binarized video signal with the video signal stored in the second video storage unit. When displaying an image similar to the image from the imaging unit on the display unit, an image which provides the display unit with an image signal stored in the first image storage unit corresponding to the silhouette image having the highest similarity compared. Switching means.

According to a third aspect of the present invention, the comparing means of the second aspect compares the similarity using the sum total of the exclusive OR for each pixel between the frames of the binarized silhouette image.

[0011]

FIG. 1 is a block diagram showing an embodiment of the present invention.

In FIG. 1, a playback apparatus for stored video according to one embodiment of the present invention includes a TV camera 1 for video input, a display video switching device 2, a video output device 3, a video output screen 4, The first image storage device 5 includes a first image storage device 5, a binarization processing circuit 6, a second image storage device 7, and a silhouette image comparison device 8. TV camera 1 for video input
Is input to the video output device 3 via the display video switching device 2, and the video output screen 4
Will be displayed. The display video switching device 2 is initially a TV
The video input from the camera 1 is set to be displayed.

A video signal input from the TV camera 1 is recorded and stored in a video storage device 5 and is also recorded and stored in a second video storage device 7 as a video binarized by a binarization processing circuit 6. Stored. When the first video storage device 5 and the second video storage device 7 store a predetermined amount of video, they stop storing thereafter. At the same time, the silhouette image comparison device 8 reads out the silhouette images from the video storage device 7 for each frame in the order in which they were stored, and sequentially compares the silhouette images with the image output from the binarization processing circuit 6 to calculate the similarity. As the similarity, for example, the total amount of exclusive OR for each pixel between frames of the binarized silhouette image can be used.

If the similarity is equal to or less than a predetermined value, a signal for starting video reproduction is given to the video storage device 5 by the silhouette image comparison device 8, and the video storage device 5 starts reproduction from the video frame at that time. . At the same time, the display image switching signal is given from the silhouette image comparison device 8 to the display image switching device 2, and the display from the image from the TV camera 1 to the display of the generated image from the image storage device 5 is switched by the image output device 3. The image is displayed on the image output screen 4.

[0015]

As described above, according to the present invention, a silhouette image of a given video is displayed when a video similar to the video is searched for from a video stored and presented and reproduced and displayed. By comparing the stored image with the silhouette image of the stored image, the image to be played was decided, so the image that at first seemed to be reflected in the mirror became independent at a certain moment It is possible to create an interactive image effect that moves around with no permission and returns to the same image of the original mirror after a while. In addition, since a real image is used instead of a computer graphics image, the reality of the image effect can be enhanced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 TV camera for video input 2 Display video switching device 3 Video output device 4 Video output screen 5, 7 Video storage device 6 Binarization processing circuit 8 Silhouette image comparison device

Claims (3)

[Claims] When presenting a video, searching for an image similar to the video from the stored video, and reproducing and displaying the video,
A stored video reproducing method, comprising determining a video to be reproduced by comparing a silhouette image of a given video with a silhouette image of a stored video. 2. An image pickup means for picking up an image, a display means for displaying the image, a first image storage means for storing a video signal picked up by the image pickup means, and a video signal picked up by the image pickup means. A second video storage unit for binarizing and storing, a comparing unit for comparing the binarized video signal with a video signal stored in the second video storage unit, and a video from the imaging unit. When displaying a similar image on the display unit, an image which provides the display unit with an image signal stored in the first image storage unit corresponding to a silhouette image having the highest similarity compared by the comparison unit. A stored video playback device comprising a switching unit. 3. The method according to claim 1, wherein the comparing unit compares the similarity using a total sum of exclusive ORs between pixels of the binarized silhouette image.
3. The stored video playback device according to item 1.