Image transfer and motion picture clipping process using outline of image

• US 7,925,105 B2
• Filed: 03/13/2007
• Issued: 04/12/2011
• Est. Priority Date: 03/14/2006
• Status: Expired due to Fees

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Nagasaka, Fumio
• Primary Examiner(s): Carter; Aaron W
• Application Number:
  US11/724,024
• Publication Number:
  US 20070217700A1
• Time in Patent Office: 1,491 Days
• Field of Search: 382/236, 382/243, 3484001-4191
• US Class Current: 382/236
• CPC Class Codes: G06V 40/161 Detection; Localisation; Normalisation
• CPC Class Codes: H04N 19/103 Selection of coding mode or of prediction mode
• CPC Class Codes: H04N 19/142 Detection of scene cut or scene change
• CPC Class Codes: H04N 19/503 involving temporal prediction adaptive coding with adaptive selection between spatial and temporal predictive coding H04N19/107; adaptive coding with adaptive selection among a plurality of temporal predictive coding modes H04N19/109
• CPC Class Codes: H04N 5/147 Scene change detection

Abstract

An image transmission apparatus comprises an outline extraction processor, a selector, and a transmission module. The outline extraction processor extracts an outline of a specific-type image element in each of the image frames and to create outline data, based on image data representing the image frames. The selector selects the image data or the outline data for each image frame for transmission to an external receiving device. An image processing apparatus in another embodiment comprises an outline extraction processor, a scene change determination module, and a clipping processor. The scene change determination module determines that a scene change is occurred between two image frames when an amount of change between the outlines in the two image frames exceeds a prescribed threshold value. The clipping processor creates clipped motion picture data representing multiple image clips which are obtained by dividing the motion picture between two image frames when the determination that a scene change has occurred between the two image frames is made.

Claims

1. An image transmission apparatus for transmitting multiple image frames, comprising:

an outline extraction processor configured, based on image data representing a plurality of image frames, to extract an outline of a specific-type image element in each of the image frames and to create outline data for each of the image frames;

a selector configured to select selected data for each of the image frames, the selected data for each image frame being either the image data representing said image frame or the outline data created for said image frame; and

a transmission module configured to transmit the selected data for each image frame to an external receiving device,

wherein the selector determines, for each image frame, whether a scene change has occurred or not, selects the image data representing said image frame if a scene change has occurred, and selects the outline data created for said image frame if a scene change has not occurred; and

wherein the selector determines, for each image frame, whether a scene change has occurred or not based on a change in a direction of an outline vector indicating a direction of an outline in said image frame.

2. An image transmission/receipt system for transmitting and receiving multiple image frames, comprising:

the image transmission apparatus according to claim 1; and

an image receiving apparatus for receiving the selected data for each image frame from the image transmission apparatus and for reproducing images from the received selected data,

wherein;

the image receiving apparatus comprises an image reconstruction module configured to reconstruct image frames from the received selected data,

(i) when the received selected data for an image frame is image data, the image reconstruction module creates a reproduced image frame based on the image data, and

(ii) when the received selected data for an image frame is outline data, the image reconstruction module creates a reproduced image frame by determining pixel values in the outline data by executing rendering within an outline expressed by the outline data.

3. A method for transmitting multiple image frames to an external receiving apparatus, comprising the steps of:

(a) extracting, based on image data representing a plurality of image frames, an outline of a specific-type image element in each of the image frames and creating outline data for each of the image frames;

(b) selecting selected data for each of the image frames, the selected data for each image frame being either the image data representing said image frame or the outline data created for said image frame; and

(c) transmitting the selected data for each image frame to an external receiving device,

wherein step (b) further comprises determining, for each image frame, whether a scene change has occurred or not, selecting the image data representing said image frame if a scene change has occurred, and selecting the outline data created for said image frame if a scene change has not occurred; and

wherein whether a scene change has occurred or not is determined, for each image frame, based on a change in a direction of an outline vector indicating a direction of an outline in said image frame.

4. An image processing apparatus for dividing a motion picture into multiple motion picture clips, comprising:

an outline extraction processor configured to extract an outline of a specific-type image element in each of a plurality of image frames of the motion picture and to create outline data, based on image data representing the image frames of the motion picture;

a scene change determination module configured to determine that a scene change has occurred between two image frames when an amount of change between the outlines extracted from the two image frames exceeds a prescribed threshold value; and

a clipping processor configured to create clipped motion picture data representing multiple motion picture clips which are obtained by dividing the motion picture between two image frames when a determination that a scene change has occurred between the two image frames is made.

5. The image processing apparatus according to claim 4, wherein

the scene change determination module uses, as the amount of change between the outlines, an amount of change in directions of outline direction vectors indicating directions of the outlines.

6. The image processing apparatus according to claim 4, wherein

the specific-type image element is a face region of a person and the clipping processor describes, in the clipped motion picture data, information identifying an image frame that includes a front of a face.

7. The image processing apparatus according to claim 4, wherein

the scene change determination module determines whether or not a scene change has occurred using prescribed parameters other than the amount of change between the outlines, in addition to the amount of change between the outlines.