Granted Patent B2

US 9,641,754 · App. 13/428,342 · Granted May 2, 2017

Abstract

Claims (42)

1. A monitoring camera comprising:

a camera configured to laterally rotate and photograph an object at different times to generate a plurality of images; and

a processor configured to generate a plurality of crop images by cropping overlapping portions of the plurality of images generated by the camera, and generate a 3-dimensional (3D) image by composing the plurality of crop images;

wherein the 3D image includes depth information of the object, the depth information being obtained based on a distance between positions of the object in the overlapping portions of the at least two images, and

wherein each crop image is generated by cropping only overlapping portions of a first image and a second image of the plurality of images, the first image and the second image being not immediately adjacent to each other among the plurality of images.

2. The monitoring camera of claim 1 , wherein the processor comprises:

a panning driver that causes the camera to laterally rotate;

an angle of view setting unit that sets an angle of view at which the camera photographs the object;

a crop image number setting unit that sets an overlap angle by which the first and second images being not immediately adjacent to each other photographed by the camera within the angle of view overlap;

a capturing unit that generates the plurality of crop images; and

a composing unit that generates the 3D image by composing the plurality of crop images into one image.

3. The monitoring camera of claim 1 , wherein the camera converts the plurality of images into an analog signal and transmits the analog signal to the processor.

4. The monitoring camera of claim 2 , wherein the overlap angle is a value obtained by dividing the angle of view by a number of crop images.

5. The monitoring camera of claim 1 , wherein the processor calculates an interval between positions of the object in the two crop images, and calculates a distance between the monitoring camera and the object using the interval between the positions of the object in the two crop images.

6. The monitoring camera of claim 2 , wherein the 3D image is generated based on a time difference between the first and second images.

7. The monitoring camera of claim 2 , wherein the panning driver causes the camera to laterally rotate 360 degrees.

8. The monitoring camera of claim 1 , wherein the at least two images are generated by photographing the object at different angles with respect to the camera.

9. The monitoring camera of claim 2 , wherein the at least two images are generated by photographing the object at different angles within the angle of view.

10. The monitoring camera of claim 1 , wherein the processor is providable as an individual unit that is separate from the monitoring camera.

11. The monitoring camera of claim 1 , wherein the processor measures a distance between the monitoring camera and the object by using a method comprising:

extracting at least one object image from each of the two crop images by removing background images from the two crop images;

detecting correlation coefficients between the extracted object images;

detecting peak values of the correlation coefficients;

calculating an interval between positions of the object from the object images by using the peak values; and

calculating the distance between the monitoring camera and the object using the interval between the positions of the object from the object images.

12. A method of generating a 3-dimensional (3D) image by using a monitoring camera to photograph an object, the method comprising:

setting an angle of view of the monitoring camera for photographing the object;

photographing the object at least twice within the angle of view at different times by laterally rotating the monitoring camera to generate a plurality of images;

generating a plurality of crop images by cropping overlapping portions of the plurality of images; and

generating a 3D image by composing the plurality of crop images into one image,

wherein the 3D image includes depth information of the object, the depth information being obtained based on a distance between positions of the object in the overlapping portions of the at least two images,

wherein each crop image is generated by cropping only overlapping portions of a first image and a second image of the plurality of images, the first image and the second image being not immediately adjacent to each other among the plurality of images.

13. The method of claim 12 , further comprising:

setting an overlap angle by which the first and second images being not immediately adjacent to each other photographed within the angle of view overlap.

14. The method of claim 12 , wherein the generating the 3D image comprises:

generating an omnidirectional 3D panoramic image by composing the plurality of crop images based on the plurality of images obtained by rotating the monitoring camera by 360°.

15. The method of claim 12 , further comprising:

extracting at least one object image from each of the two crop images by removing background images from the two crop images;

detecting correlation coefficients between the extracted object images;

detecting peak values of the correlation coefficients;

calculating an interval between positions of the object from the object images by using the peak values; and

calculating a distance between the monitoring camera and the object using the interval between the positions of the object from the object images.

Assignments (6)