Inventor

SHARMA RAVI K

US146 patents

⚠️ This page may combine multiple inventors who share the name “SHARMA RAVI K”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SHARMA RAVI K

DIGIMARC CORP

Signal embedding and detection using circular structures in a transform domain of a media signal

Watermark orientation signals conveying payload data

Variable message coding protocols for encoding auxiliary data in media signals

Wavelet domain watermarks

Media signal filtering for use in digital watermark reading

Digital watermark screening and detection strategies

Progressive watermark decoding on a distributed computing platform

Extracting digital watermarks using logarithmic sampling and symmetrical attributes

Quantization-based data hiding employing calibration and locally adaptive quantization

Digital watermark screening and detecting strategies

Synchronizing readers of hidden auxiliary data in quantization-based data hiding schemes

Determining transformations of media signals with embedded code signals

Watermark detection using a fourier mellin transform

Wavelet domain watermarks

Image processing arrangements

Methods for object recognition and related arrangements

Sparse modulation for robust signaling and synchronization

Methods for object recognition and related arrangements

Digital watermarking methods and related toy and game applications

Progressive watermark decoding on a distributed computing platform

Watermark detection utilizing regions with higher probability of success

Digital watermarks adapted to compensate for time scaling, pitch shifting and mixing

Human auditory system modeling with masking energy adaptation

Audio watermark encoding with reversing polarity and pairwise embedding

Encoded reference signal for digital watermarks

Detection of multiple watermarks and improved watermark calibration signals

Pre-filteriing to increase watermark signal-to-noise ratio

Watermark detection utilizing regions with higher probability of success

Authenticating identification and security documents and other objects

Signal processors and methods for estimating geometric transformations of images for digital data extraction

Hardware-adaptable watermark systems

Multi-mode audio recognition and auxiliary data encoding and decoding

Multi-mode audio recognition and auxiliary data encoding and decoding

Digital watermarking methods, apparatus and systems

Steganographic encoding and decoding

Physiologic audio fingerprinting

Reducing watermark perceptibility and extending detection distortion tolerances

Digital watermarking methods, apparatus and systems

Steganographic encoding and decoding

Combined watermarking and fingerprinting

Histogram methods and systems for object recognition

Signal processing utilizing host carrier information

RODRIGUEZ TONY F

Authenticating identification and security documents and other objects

Authenticating identification and security documents

Automated methods for distinguishing copies from original printed objects

SHARMA RAVI K

Combined watermarking and fingerprinting

Signal processors and methods for estimating transformations between signals with least squares

RHOADS GEOFFREY B

Image processing using embedded registration data to determine and compensate for geometric transformation

REED ALASTAIR M

Fragile and emerging digital watermarks

INTEL CORP

Method and apparatus for increasing video frame rate