Texas Instruments Corporation

Shivam Srivastava

Jeffrey Matthew Kempf

Visvesvaraya Appala Pentakota

Jagannathan Venkataraman

Shagun Dusad

Eeshan Miglani

Neeraj Shrivastava

Viswanathan Nagarajan

Srinivas Kumar Reddy Naru

Narasimhan Rajagopal

Prasanth K

Chirag Chandrahas Shetty

Nithin Gopinath

Jaime Rene De La Cruz

Charls Babu

Harshit Moondra

Jaime Rene De La Cruz Vazquez

An example apparatus includes: a controller configured to: generate a pattern of points; obtain a first image of a first reflection of a projection of the pattern of points from a first camera; generate a first point cloud having a first coordinate system based on the first image; obtain a second image of a second reflection of the projection of the pattern of points from a second camera; generate a second point cloud having a second coordinate system based on the second image; determine a rigid body transform to convert coordinates of the second coordinate system to coordinates of the first coordinate system; apply the rigid body transform to the second point cloud to generate a transformed point cloud; and generate a corrected point cloud based on the transformed point cloud.

Methods and apparatus for camera assisted geometric correction

An apparatus includes a first camera configured to capture a first image being displayed, a second camera configured to capture a second image being displayed, and a processor configured to generate a pair-wise homography transform for the first camera and the second camera, and map, based on the pair-wise homography transform, the second image from a second frame of reference of the second camera to a first frame of reference of the first camera. The processor is further configured to determine a first corrected quadrilateral for the first image and a second corrected quadrilateral for the second image in the first frame of reference, and project, based on the pair-wise homography transform, the second corrected quadrilateral from the first frame of reference to the second frame of reference. The quadrilaterals are then processed to warp respective images for geometric correction before projecting the images by respective projectors.

System and method for projector geometric correction

In described examples, a circuit includes a calibration engine. The calibration engine generates multiple input codes. A digital to analog converter (DAC) is coupled to the calibration engine, and generates a first calibration signal in response to a first input code of the multiple input codes. An analog to digital converter (ADC) is coupled to the DAC, and generates multiple raw codes responsive to the first calibration signal. A storage circuit is coupled to the ADC and stores a first output code corresponding to the first input code. The first output code is obtained using the multiple raw codes generated by the ADC.

Calibration scheme for filling lookup table in an ADC

Growing community of inventors

Bengaluru, India

Shivam Srivastava