Image distribution system of surveillance camera with privacy protection

• US 7,447,332 B2
• Filed: 01/19/2005
• Issued: 11/04/2008
• Est. Priority Date: 02/18/2004
• Status: Expired due to Fees

• Current Assignee: Hitachi Industry & Control Solutions, Ltd. (Hitachi, Ltd.)
• Original Assignee: Hitachi, Ltd.
• Inventors: Nagaya, Shigeki, Kimura, Junichi, Horii, Youichi
• Primary Examiner(s): Johns; Andrew W
• Application Number:
  US11/037,337
• Publication Number:
  US 20050180595A1
• Time in Patent Office: 1,385 Days
• Field of Search: 382/103, 382/106, 382/173, 382/282, 382/283, 382/284, 348/143, 348/150, 348/154, 348/155, 380/210
• US Class Current: 382/103
• CPC Class Codes: G06V 20/10 Terrestrial scenes scenes under surveillance with static cameras G06V20/52; scenes perceived from the exterior of a vehicle G06V20/56; scenes perceived from the interior of a vehicle G06V20/59

Abstract

It is desirable to distribute a most recently inputted image of merchandise in a shop without showing customers visiting a shop, or to distribute an image showing how crowded a shop is without infringing on the privacy of visitors to the ship. This is achieved by separating areas showing moving objects and areas showing no moving objects of an image and synthesizing an image showing stationary objects only by replacing the moving object area with the corresponding area of an earlier inputted image showing stationary objects only, or by processing the moving object area of an image, for example, by applying a mosaic to such an area, and synthesizing the synthesized image showing stationary objects only. The image in which the moving object area has been processed enables the distribution of an image showing how crowded a shop is without infringing on the privacy of visitors.

Claims

1. An image distribution system comprising an image input device for inputting an image, an image processing section, and a distribution device connected to a network for distributing a processed image,

wherein the image processing section separates the image inputted with the image input device into an area to which a moving object image has been inputted and the other area to which no moving object image has been inputted, generates a synthesized image which is equal to the image inputted with the image input device with the area of the moving object image replaced with a corresponding area of an image inputted earlier showing stationary objects only, and outputs the synthesized image to the distribution device.

2. The image distribution system according to claim 1, wherein the image processing section determines an area of the image inputted with the image input device where time-series variation in brightness of each pixel does not remain within a certain range for a certain period of time to be representing a moving object.

3. The image distribution system according to claim 1, wherein the image processing section detects a facial portion of a person in the image inputted with the image input device and determines the detected portion to be representing the moving object.

4. The image distribution system according to claim 1, wherein the image processing section generates the synthesized image based on the area of the moving object image determined using a distance sensor.

5. The image distribution system according to claim 1, wherein the image processing section generates the synthesized image based on the area of the moving object image determined using results of depth measurement made using a plurality of cameras.

6. The image distribution system according to claim 1, wherein the image processing section generates the synthesized image based on the area of the moving object image determined using results of temperature measurement made using a temperature sensor.

7. An image distribution-system comprising an image input device for inputting an image, an image processing section, and a distribution device connected to a network for distributing a processed image,

wherein the image processing section separates the image inputted with the image input device into an area to which a moving object image has been inputted and the other area to which no moving object image has been inputted, generates a synthesized image equal to the image inputted with the image input device with the area of the moving object image replaced with a silhouette image of the moving object, and outputs the synthesized image to the distribution device.

8. The image distribution system according to claim 7, wherein the image processing section fills inside an outline of the silhouette image with a low-resolution image.

9. The image distribution system according to claim 7, wherein the image processing section encrypts and then outputs the area of the moving object image to the distribution device.

10. The image distribution system according to claim 9, wherein the encryption comprises, when encoding an analog image signal into a digital signal, embedding encryption data in digital data.

11. The image distribution system according to claim 9, wherein the encryption is effected using a code determined by a distributing party and a receiving party and is designed to be decrypted by the code.

12. The image distribution system according to claim 9, wherein the encryption is effected using a first code determined by the distributing party and is designed to be decrypted by a second code used in communicating the first code to the receiving party.

13. The image distribution system according to claim 9, wherein the encryption is effected using a code determined by the distributing party and is designed to charge a fee to the receiving party, to communicate the code to the receiving party, and to be decrypted by the code.

14. The image distribution system according to claim 9, wherein the encryption is effected using a code determined by the receiving party and is designed to be decrypted by the code.