Camera device and motion detection method for the same

1. A camera device used for detecting a motion scene, the device comprising:

an image capturing module to capture a plurality of consecutive images of the motion scene;

a data processing module to calculate characteristic values of the plurality of consecutive images captured by the image capturing module;

a storing module to store the characteristic values of the plurality of consecutive images;

an image matching module to match two consecutive images of the plurality of consecutive images via an autocorrelation of the characteristic values of the two consecutive images, to obtain corresponding areas having a certain correlation degree in both of the two consecutive images; and

a motion detecting module to compare the characteristic values of the corresponding areas in both of the two consecutive images, and identify the region therein having different characteristic values as a motion area of the motion scene, thereby detecting the moving object.

2. The device of claim 1 , wherein the image capturing module is a charge coupled device.

3. The device of claim 1 , wherein the characteristic values of the plurality of images are obtained by a fast Fourier transform of geometry characteristics of the plurality of consecutive images.

4. The device of claim 1 , wherein the characteristic values of the plurality of images are obtained by a fast Fourier transform of color characteristics of the plurality of consecutive images.

5. The device of claim 1 , wherein the characteristic values of the plurality of images are obtained by a fast Fourier transform of texture characteristics of the plurality of consecutive images.

6. The device of claim 1 , wherein the correlation degree of the autocorrelation of the characteristic values of the two consecutive images ranges between about 80%-90%.

7. A motion detection method for a camera device for detecting a motion scene, comprising:

capturing a first image of the motion scene via an image capturing module at a first time;

calculating characteristic values of the first image and storing the characteristic values of the first image in a memory system of the camera device;

capturing a second image of the motion scene via the image capturing module at a second time continuous with the first time;

calculating the characteristic values of the second image and storing the characteristic values of the second image in the memory system;

matching the first image and the second image via an autocorrelation of the characteristic values of the first image and the second image, to obtain corresponding areas with a certain correlation degree in both of the first image and the second image; and

comparing the characteristic values of the corresponding areas in both of the first image and the second image, and identify the region with different characteristic values as a motion area of the motion scene, thereby detecting the moving object.

8. The method of claim 7 , wherein the image capturing module is a charge coupled device.

9. The method of claim 7 , wherein the characteristic values of the plurality of images are obtained by a fast Fourier transform of geometry characteristics of the plurality of consecutive images.

10. The method of claim 7 , wherein the characteristic values of the plurality of images are obtained by a fast Fourier transform of color characteristics of the plurality of consecutive images.

11. The method of claim 7 , wherein the characteristic values of the plurality of images are obtained by a fast Fourier transform of texture characteristics of the plurality of consecutive images.

12. The method of claim 7 , wherein the correlation degree of the autocorrelation of the characteristic values of the two consecutive images ranges between about 80%-90%.

13. A computer-readable medium having instructions stored thereon that, when executed by a computer comprising an image capturing module, the computer-readable medium causes the computer to:

capture a first image of the motion scene via the image capturing module at a first time;

calculate characteristic values of the first image and storing the characteristic values of the first image in a memory system;

capture a second image of the motion scene via the image capturing module at a second time continuous with the first time;

calculate the characteristic values of the second image and storing the characteristic values of the second image in the memory system;

match the first image and the second image via an autocorrelation of the characteristic values of the first image and the second image, to obtain corresponding areas with a certain correlation degree in both of the first image and the second image; and

compare the characteristic values of the corresponding areas in both of the first image and the second image, and identify the region with different characteristic values as a motion area of the motion scene, thereby detecting the moving object.

14. The media of claim 13 , wherein the image capturing module is a charge coupled device.

15. The media of claim 13 , wherein the characteristic values of the plurality of images are obtained by a fast Fourier transform of geometry characteristics of the plurality of consecutive images.

16. The media of claim 13 , wherein the characteristic values of the plurality of images are obtained by a fast Fourier transform of color characteristics of the plurality of consecutive images.

17. The media of claim 13 , wherein the characteristic values of the plurality of images are obtained by a fast Fourier transform of texture characteristics of the plurality of consecutive images.

18. The media of claim 13 , wherein the correlation degree of the autocorrelation of the characteristic values of the two consecutive images ranges between about 80%-90%.