US 12,189,727 B2
Sensor watermarking on raw images
Wenshou Chen, Santa Clara, CA (US); Guansong Liu, San Jose, CA (US); Boyd Fowler, Sunnyvale, CA (US); Ramakrishna Kakarala, Santa Clara, CA (US); and Yiyi Ren, Santa Clara, CA (US)
Assigned to OmniVision Technologies, Inc., Santa Clara, CA (US)
Filed by OmniVision Technologies, Inc., Santa Clara, CA (US)
Filed on Sep. 17, 2021, as Appl. No. 17/478,237.
Prior Publication US 2023/0087541 A1, Mar. 23, 2023
Int. Cl. G06F 15/16 (2006.01); G06F 21/16 (2013.01); G06F 21/60 (2013.01); G06T 1/00 (2006.01); H04L 1/00 (2006.01); G06F 17/14 (2006.01)
CPC G06F 21/16 (2013.01) [G06F 21/602 (2013.01); G06T 1/005 (2013.01); G06T 1/0092 (2013.01); H04L 1/004 (2013.01); G06F 17/14 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of embedding a digital watermark, comprising:
generating preprocessed coefficients from a pixel-array output using a mathematical transform;
encrypting a watermark message using a first key, wherein the watermark message comprises information associated with the pixel-array or with an image sensor including the pixel-array;
randomizing the encrypted watermark message using a second key to form a randomized watermark; and
embedding the randomized watermark in randomly selected preprocessed coefficients to generate image coefficients with an embedded digital watermark.