Network camera system

• US 8,274,548 B2
• Filed: 10/16/2007
• Issued: 09/25/2012
• Est. Priority Date: 10/16/2006
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Fujita, Shunji
• Primary Examiner(s): Blair, Douglas
• Application Number:
  US11/873,284
• Publication Number:
  US 20080088699A1
• Time in Patent Office: 1,806 Days
• Field of Search: 348/36
• US Class Current: 348/36
• CPC Class Codes: H04N 7/183 for receiving images from a single remote source

Abstract

A network camera system which is capable of generating a panoramic image by smooth or seamless connection of images, even when a network camera having a wide-angle lens is used. A network camera system includes a network camera that has a wide-angle lens which can be controlled for zooming, and a PC that is connected to the image pickup device via a network, for controlling the network camera. The PC comprises a panoramic image generation unit for generating a panoramic image by connecting a plurality of images picked up by the network camera and a remote zoom unit for causing the wide-angle lens of the image pickup device to move to a predetermined position when the network camera system is in a panoramic shooting mode.

Claims

1. A network camera system comprising:

an image pickup device that has a wide-angle lens which can be controlled for panning, tilting, and zooming; and

a control unit that is connected to said image pickup device, via a network, for controlling said image pickup device,

wherein said control unit comprises;

a panoramic image generation unit configured to generate a panoramic image by connecting a plurality of images picked up by said image pickup device based on a coordinate system that is a function of pan and tilt angles of the image pickup device; and

a zoom unit configured to change a zoom magnification of the image pickup device when the network camera system is in a panoramic shooting mode,

wherein the control unit is configured to control the image pickup device to pickup one or more of the plurality of images after the zoom unit changes the zoom magnification, and

wherein the zoom unit is configured to increase the zoom magnification as a position of the panning and tilting becomes closer to a center position, according to the coordinate system, of the panoramic image to be generated by the panoramic image generation unit.

2. A network camera system as claimed in claim 1, wherein when the position of the panning and tilting is defined as an edge position of the panoramic image to be generated by the panoramic image generation unit, said zoom unit is configured to change the zoom magnification to 1.

3. A method executed by a control unit of a network camera system, the network camera system including an image pickup device that has a wide-angle lens which can be controlled for panning, tilting, and zooming, the control unit connected to said image pickup device, via a network, for controlling said image pickup device, the method comprising:

a panoramic image generation step of generating a panoramic image by connecting a plurality of images picked up by said image pickup device based on a coordinate system that is a function of pan and tilt angles of the image pickup device;

a zoom step of changing a zoom magnification of the image pickup device when the network camera system is in a panoramic shooting mode; and

a controlling step of controlling the image pickup device to pickup one or more of the plurality of images after the zoom unit changes the zoom magnification,

wherein the zoom step includes increasing the zoom magnification as a position of the panning and tilting becomes closer to a center position, according to the coordinate system, of the panoramic image to be generated in the panoramic image generation step.