Kartik N Venkataraman

US Patent:

6783900, Aug 31, 2004

Filed:

May 13, 2002

Appl. No.:

10/142961

Inventors:

Kartik Venkataraman - San Jose CA

Assignee:

Micron Technology, Inc. - Boise ID

International Classification:

G02B 520

US Classification:

430 7, 348 71, 348 77, 348280, 257440, 600109, 359891

Abstract:

A color filter array pattern for use in a solid-state imager comprising red sensitive elements located at every other array position, with alternating blue sensitive and green sensitive elements located at the remaining array positions, is disclosed. Since red color is sampled most frequently, the color filter may be part of an in vivo camera system for imaging internal human body organs and tissues.

US Patent:

6876361, Apr 5, 2005

Filed:

Mar 15, 2001

Appl. No.:

09/810654

Inventors:

Kartik Venkataraman - San Jose CA, US

Assignee:

Micron Technology, Inc. - Boise ID

International Classification:

G06T017/00

US Classification:

345424, 345582

Abstract:

A slice plane, oriented parallel to a viewing plane, is passed through a cuboidal dataset at regular intervals. The intersection of the slice plane with the cuboidal volume dataset results in primitives (quads, triangles, etc. depending on the angle and position of the intersection) whose vertices have position coordinates (x, y, z) and 3D-texture coordinates (r, s, t). The resulting primitives are rasterized using, for example, a traditional 3D graphics pipeline wherein the 3D-texture coordinates are interpolated across the scanlines producing 3D-texture coordinates for each fragment. The resulting 3D-texture coordinates for each fragment are stored in a 2D-texture storage area. These 2D-textures are called density-textures. By preprocessing the cuboidal dataset, the rendering process becomes a compositing process. A rendering process is comprised of looking-up, for each densel in the texture, the corresponding color and opacity values in the current lookup-table.

US Patent:

7245300, Jul 17, 2007

Filed:

Feb 10, 2005

Appl. No.:

10/906242

Inventors:

Kartik Venkataraman - San Jose CA, US

Assignee:

Micron Technology, Inc. - Boise ID

International Classification:

G06T 17/00

US Classification:

345424, 345428, 345581, 345582, 345583, 345589, 345600, 345601, 345602, 345606, 345608

Abstract:

A slice plane, oriented parallel to a viewing plane, is passed through a cuboidal dataset at regular intervals. The intersection of the slice plane with the cuboidal volume dataset results in primitives (quads, triangles, etc. depending on the angle and position of the intersection) whose vertices have position coordinates (x, y, z) and 3D-texture coordinates (r, s, t). The resulting primitives are rasterized using, for example, a traditional 3D graphics pipeline wherein the 3D-texture coordinates are interpolated across the scanlines producing 3D-texture coordinates for each fragment. The resulting 3D-texture coordinates for each fragment are stored in a 2D-texture storage area. These 2D-textures are called density-textures. By preprocessing the cuboidal dataset, the rendering process becomes a compositing process. A rendering process is comprised of looking-up, for each densel in the texture, the corresponding color and opacity values in the current lookup-table.

US Patent:

7373005, May 13, 2008

Filed:

Apr 10, 2003

Appl. No.:

10/410192

Inventors:

Kartik Venkataraman - San Jose CA, US

Assignee:

Micron Technology, Inc. - Boise ID

International Classification:

G06K 9/36
G06K 9/46
G06K 9/48

US Classification:

382239, 382238, 382244, 382247

Abstract:

An imaging system incorporating adaptive compression which includes determining linear predictive differential residuals from an imager array pixel row. The differential residuals are classified into categories, each category having a range of differential residuals associated with it. The categories are analyzed to produce an ordered list having categories with most to least frequent residuals falling within a respective residual range associated with a respective category. The ordered list is then used to select a variable length encoding table with a matching ordered list. Variable length encoded category and range position offset data is output to a serializer unit, where the range position offset refers to a position in a range associated with a particular category.

US Patent:

7708686, May 4, 2010

Filed:

Jun 8, 2004

Appl. No.:

10/862408

Inventors:

Kartik Venkataraman - San Jose CA, US

Assignee:

Aptina Imaging Corporation - Grand Cayman

International Classification:

A61B 1/04
H04N 9/083

US Classification:

600109, 600921, 348 71, 348273, 348277

Abstract:

A color filter array pattern for use in a solid-state imager comprising red sensitive elements located at every other array position, with alternating blue sensitive and green sensitive elements located at the remaining array positions, is disclosed. Since red color is sampled most frequently, the color filter may be part of an in vivo camera system for imaging internal human body organs and tissues.

US Patent:

7751634, Jul 6, 2010

Filed:

Jan 31, 2007

Appl. No.:

11/700090

Inventors:

Kartik Venkataraman - San Jose CA, US

Assignee:

Micron Technology, Inc. - Boise ID

International Classification:

G06K 9/46

US Classification:

382239, 382244, 382245, 382246

Abstract:

An imaging system incorporating adaptive compression which includes determining linear predictive differential residuals from an imager array pixel row. The differential residuals are classified into categories, each category having a range of differential residuals associated with it. The categories are analyzed to produce an ordered list having categories with most to least frequent residuals falling within a respective residual range associated with a respective category. The ordered list is then used to select a variable length encoding table with a matching ordered list. Variable length encoded category and range position offset data is output to a serializer unit, where the range position offset refers to a position in a range associated with a particular category.

US Patent:

8131097, Mar 6, 2012

Filed:

May 28, 2008

Appl. No.:

12/128234

Inventors:

Dan Lelescu - Morgan Hill CA, US
Robert Mullis - Soquel CA, US
Pravin Rao - San Jose CA, US
Kartik Venkataraman - San Jose CA, US
Cheng Lu - Santa Clara CA, US
Junqing Chen - San Jose CA, US

Assignee:

Aptina Imaging Corporation - George Town

International Classification:

G06K 9/40

US Classification:

382254

Abstract:

A method and apparatus are disclosed for restoring an image captured through an extended depth-of-field lens. Preprocessed data relating to image degradation is stored and used during an image restoration process.

US Patent:

8619082, Dec 31, 2013

Filed:

Aug 21, 2013

Appl. No.:

13/972881

Inventors:

Kartik Venkataraman - San Jose CA, US
Gabriel Molina - Palo Alto CA, US
Dan Lelescu - Morgan Hill CA, US

Assignee:

Pelican Imaging Corporation - Mountain View CA

International Classification:

G06T 15/10
G06K 9/00

US Classification:

345427, 382154

Abstract:

Systems in accordance with embodiments of the invention can perform parallax detection and correction in images captured using array cameras. Due to the different viewpoints of the cameras, parallax results in variations in the position of objects within the captured images of the scene. Methods in accordance with embodiments of the invention provide an accurate account of the pixel disparity due to parallax between the different cameras in the array, so that appropriate scene-dependent geometric shifts can be applied to the pixels of the captured images when performing super-resolution processing. In several embodiments, detecting parallax involves using competing subsets of images to estimate the depth of a pixel location in an image from a reference viewpoint. In a number of embodiments, generating depth estimates considers the similarity of pixels in multiple spectral channels. In certain embodiments, generating depth estimates involves generating a confidence map indicating the reliability of depth estimates.