Methods and systems for embedding camera information in images
View Patent ↗The present invention is related to providing, in association with an image, information related to the image capture device used to capture the image. In one embodiment, information related to a first static camera characteristic and camera setting information related to a first captured digitized image is embedded in the first captured digitized image using a watermark. The watermarked information may be used to identify the source or owner of the picture, and/or to aid in the more accurate reproduction of the image.
1. A camera, comprising:
an imaging device configured to capture an image, wherein an inherent characteristic associated with the imaging device affects an image quality of every image that the imaging device captures; and
a processing device configured to embed a watermark into the image to generate a watermarked image, wherein the watermark indicates the inherent characteristic associated with the imaging device, and wherein the watermark uniquely identifies the camera based, at least in part, on the inherent characteristic.
2. The camera of claim 1 , wherein the inherent characteristic comprises a distribution pattern associated with one or more defective pixels of the imaging device.
3. The camera of claim 2 , wherein the distribution pattern indicates both a number of the defective pixels and a location of the defective pixels in the imaging device.
4. The camera of claim 1 , wherein the watermark comprises an identical watermark that is applied to all images captured by the imaging device.
5. The camera of claim 4 , wherein the watermarked image is generated using the inherent characteristic, and wherein the identical watermark indicates copyright ownership of all the images captured by the imaging device.
6. The camera of claim 1 , wherein the inherent characteristic is used to generate the watermarked image, and wherein the inherent characteristic comprises at least one of: color cross-talk information, pixel gain values, pixel row offset, pixel column offset, or current leakage.
7. The camera of claim 1 , wherein the processing device is further configured to encrypt the watermark utilizing the inherent characteristic.
8. The camera of claim 7 , wherein the watermark is encrypted using a key, and wherein the key is generated based, at least in part, on the inherent characteristic associated with the imaging device.
9. The camera of claim 8 , wherein a pseudo-random number generator generates a pseudo-random number sequence using the key as a seed.
10. The camera of claim 1 , wherein the watermarked image is transmitted subsequent to the generation of the watermarked image.
11. The camera of claim 1 , wherein the inherent characteristic comprises a physical property of the imaging device, and wherein the watermark indicates the physical property.
12. An apparatus, comprising:
means for capturing an image, wherein an inherent characteristic of the means for capturing similarly affects an image quality of every image that is captured; and
means for applying a watermark to the image, wherein the watermark indicates the inherent characteristic, and wherein the watermark uniquely identifies the apparatus.
13. The apparatus of claim 12 , wherein the inherent characteristic comprises a distribution pattern associated with one or more pixels of the imaging device.
14. The apparatus of claim 13 , wherein the one or more pixels comprise a number of pixels providing a response outside of a desired range, and wherein the distribution pattern indicates a location of the number of pixels in the imaging device.
15. The apparatus of claim 12 , wherein the watermark comprises an identical watermark that is applied to all the images captured by the imaging device.
16. The apparatus of claim 15 , further comprising means for associating the identical watermark with copyright ownership of all the images captured by the imaging device.
17. The apparatus of claim 12 , wherein the watermark uniquely identifies the apparatus based, at least in part, on the inherent characteristic.
18. A method, comprising:
capturing an image with an image capturing device, wherein an inherent characteristic of the image capturing device affects an image quality of every image that is captured by the image capturing device; and
embedding, with the image capturing device, a watermark into the image to generate a watermarked image, wherein the watermark indicates the inherent characteristic, and wherein the watermark uniquely identifies the image capturing device.
19. The method of claim 18 , wherein the inherent characteristic comprises a distribution pattern associated with one or more defective pixels of the image capturing device.
20. The method of claim 19 , wherein the distribution pattern indicates a location of the one or more defective pixels in the image capturing device.
21. The method of claim 18 , wherein the inherent characteristic is used to generate the watermarked image, and wherein the inherent characteristic comprises at least one of: sensor frequency response, sensor current value, or sensor sensitivity.
22. The method of claim 18 , further comprising associating the watermark with one or more copyrights to the image.
23. The method of claim 22 , further comprising:
receiving the watermarked image;
analyzing the watermark; and
identifying an ownership of the one or more copyrights to the image in response to analyzing the watermark.