Patents by Inventor Tinku Acharya

Tinku Acharya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Two-dimensional pyramid filter architecture
    Publication number: 20020161807
    Abstract: Embodiments of a two-dimensional pyramid filter architecture are described.
    Type: Application
    Filed: March 30, 2001
    Publication date: October 31, 2002
    Inventor: Tinku Acharya
  • Pyramid filter
    Publication number: 20020143832
    Abstract: Embodiments of a pyramid filter are described.
    Type: Application
    Filed: March 28, 2001
    Publication date: October 3, 2002
    Inventor: Tinku Acharya
  • Method of integrating a watermark into a compressed image
    Patent number: 6449380
    Abstract: In accordance with one embodiment of the invention, a method is provided for integrating at least a portion of a watermark into at least a portion of a compressed image. The method of this embodiment includes encoding at least a portion of the watermark and compressing at least a portion of the image. The encoded watermark, or portion thereof, and the compressed image, or portion thereof, are combined. Of course, many other embodiments in accordance with the invention are included within the scope of the present invention.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: September 10, 2002
    Assignee: Intel Corporation
    Inventors: Tinku Acharya, Kannan Raj
  • Method of performing video encoding rate control using bit budget
    Publication number: 20020122482
    Abstract: Embodiments of a method for video encoding rate control using a bit budget are disclosed.
    Type: Application
    Filed: January 3, 2001
    Publication date: September 5, 2002
    Inventors: Hyun Mun Kim, Tinku Acharya
  • Method of performing video encoding rate control using motion estimation
    Publication number: 20020118746
    Abstract: Embodiments of a method for video encoding rate control using motion estimation are disclosed.
    Type: Application
    Filed: January 3, 2001
    Publication date: August 29, 2002
    Inventors: Hyun Mun Kim, Tinku Acharya
  • Integrated color interpolation and color space conversion algorithm from 8-bit bayer pattern RGB color space to 12-bit YCrCb color space
    Publication number: 20020101524
    Abstract: An integrated color interpolation and color space conversion technique and apparatus. A raw image that is arranged in a Bayer pattern where each pixel has only one of the color components needed to form a full color resolution pixel may be converted using this technique directly to a YCrCb image space without any intermediate conversion or interpolation steps. Specifically, in one instance, an 8-bit Bayer pattern raw image may be converted directly to a 12-bit YCrCb space in a single step approach. Such an integrated technique may more readily and inexpensively implemented in hardware such as on a digital camera, or in software.
    Type: Application
    Filed: December 14, 2001
    Publication date: August 1, 2002
    Applicant: Intel Corporation
    Inventor: Tinku Acharya
  • Method for block-based digital image watermarking
    Publication number: 20020090107
    Abstract: A method of encoding a watermark into a digital image. The method includes partitioning an original image into blocks and then determining a variance value of each block. The blocks are then arranged according to the variance values. A number of selected blocks are identified, where the number depends upon the size of the watermark. The blocks selected are then arranged by their location. Data from the watermark is used to replace bits in a representation of each of the selected blocks with data from the watermark. A method of decoding is also discussed.
    Type: Application
    Filed: November 29, 2000
    Publication date: July 11, 2002
    Applicant: Intel Corporation
    Inventors: Tinku Acharya, Bhargab Bikram Bhattacharya, Malay Kumar Kundu, Suman Kumar Mitra, Chivukula Anjaneya Murthy
  • Multiplierless pyramid filter
    Publication number: 20020087607
    Abstract: Embodiments of a multiplierless pyramid filter are described.
    Type: Application
    Filed: January 3, 2001
    Publication date: July 4, 2002
    Inventor: Tinku Acharya
  • Method of performing video encoding rate control
    Publication number: 20020085633
    Abstract: Embodiments of a method for video encoding rate control are disclosed.
    Type: Application
    Filed: January 3, 2001
    Publication date: July 4, 2002
    Inventors: Hyun Mun Kim, Tinku Acharya, Hyung-Suk Kim
  • Color filter array and color interpolation algorithm
    Publication number: 20020063789
    Abstract: A color filter array includes arrangements of green-filtered pixels to optimize performance and accuracy of color interpolation operations. Where red or blue pixels are found, green values are estimated with a high degree of accuracy. Unknown red and blue intensity values are interpolated by converting known red and blue values to hue. The interpolated hue values are then converted to intensity data.
    Type: Application
    Filed: November 30, 2000
    Publication date: May 30, 2002
    Inventors: Tinku Acharya, Swagato Chakraborty, Ajoy Kumar Ray
  • Imaging device connected to processor-based system using high-bandwidth bus
    Publication number: 20020063899
    Abstract: An imaging device is tethered to a processor-based system by a high-bandwidth serial bus. Image data produced in the imaging device is minimally processed before being transferred to the processor-based system for more extensive image processing. In particular, compression inside the imaging device may be avoided, for some image resolutions. Where higher throughput of image data through the high-bandwidth bus is desired, the imaging device performs scaled color interpolation on the image data before its transmission to the processor-based system.
    Type: Application
    Filed: November 29, 2000
    Publication date: May 30, 2002
    Inventors: Tinku Acharya, Werner Metz
  • Integrated color interpolation and color space conversion algorithm from 8-bit bayer pattern RGB color space to 12-bit YCrCb color space
    Patent number: 6392699
    Abstract: An integrated color interpolation and color space conversion technique and apparatus. A raw image that is arranged in a Bayer pattern where each pixel has only one of the color components needed to form a full color resolution pixel may be converted using this technique directly to a YCrCb image space without any intermediate conversion or interpolation steps. Specifically, in one instance, an 8-bit Bayer pattern raw image may be converted directly to a 12-bit YCrCb space in a single step approach. Such an integrated technique may more readily and inexpensively implemented in hardware such as on a digital camera, or in software.
    Type: Grant
    Filed: March 4, 1998
    Date of Patent: May 21, 2002
    Assignee: Intel Corporation
    Inventor: Tinku Acharya
  • USING AN ELECTRONIC CAMERA TO BUILD A FILE CONTAINING TEXT
    Publication number: 20020057848
    Abstract: An embodiment of the invention is directed to a method of building an electronic file, using an electronic camera such as a digital camera, that captures 3-dimensional objects. A number of image data tiles that represent the images are generated by the camera. A number of text data tiles each containing text recognized in a corresponding one of the image data tiles is generated. The method includes searching for overlapping text in the text tiles, and pasting the text tiles in proper alignment into an electronic file.
    Type: Application
    Filed: April 29, 1999
    Publication date: May 16, 2002
    Inventors: YAP-PENG TAN, TINKU ACHARYA, WERNER METZ
  • Hi-speed deterministic approach in detecting defective pixels within an image sensor
    Patent number: 6381357
    Abstract: What is disclosed is a method including downloading a sequence of images from an image sensor, and then marking on a map a pixel location of the sensor defective if a Defective Vote score exceeds a first threshold, the score tallied over all captured images. The defective pixel map is stored on a host computer, which performs the defective pixel detection on behalf of the sensor, rather than directly on the device incorporating the image sensor.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: April 30, 2002
    Assignee: Intel Corporation
    Inventors: Yap-Peng Tan, Tinku Acharya
  • Edge enhanced image up-sampling algorithm using discrete wavelet transform
    Patent number: 6377280
    Abstract: A method comprising constructing virtual (Discrete Wavelet Transform) DWT sub-bands from an image by performing the DWT and then applying an inverse DWT upon the virtual sub-bands, the result of the inverse DWT representing an up-sampled version of the image. In an alternate embodiment, an apparatus comprising a computer readable medium having instructions which when executed perform constructing virtual (Discrete Wavelet Transform) DWT sub-bands from an image by performing a DWT upon the image, applying an inverse DWT upon the virtual sub-bands, the result of the inverse DWT representing an up-sampled version of the image.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: April 23, 2002
    Assignee: Intel Corporation
    Inventors: Tinku Acharya, Ping-Sing Tsai
  • Method and apparatus for automatic focusing in an image capture system using symmetric FIR filters
    Patent number: 6373481
    Abstract: In one embodiment, a method for determining a focus value in an image, including selecting an area of interest in the image and a color plane of interest, is described. The color plane of interest within the area of interest is filtered to produce a filtered region. The mean absolute value of the filtered region is determined.
    Type: Grant
    Filed: August 25, 1999
    Date of Patent: April 16, 2002
    Assignee: Intel Corporation
    Inventors: Yap-Peng Tan, Brent Thomas, Tinku Acharya
  • Median computation-based integrated color interpolation and color space conversion methodology from 8-bit bayer pattern RGB color space to 24-bit CIE XYZ color space
    Patent number: 6366692
    Abstract: What is disclosed is an integrated color interpolation and color space conversion technique and apparatus. A raw image that is arranged in a Bayer pattern where each pixel has only one of the color components needed to form a full color resolution pixel may be converted using this technique directly to a XYZ space image without any intermediate conversion or interpolation steps. Specifically, in one instance, an 8-bit Bayer pattern raw image may be converted directly to a 24-bit XYZ space in a single pass approach. Such an integrated technique may more readily and inexpensively implemented in hardware such as on a digital camera, or in software.
    Type: Grant
    Filed: March 30, 1998
    Date of Patent: April 2, 2002
    Assignee: Intel Corporation
    Inventor: Tinku Acharya
  • Integrated color interpolation and color space conversion algorithm from 8-bit Bayer pattern RGB color space to 24-bit CIE XYZ color space
    Patent number: 6366694
    Abstract: What is disclosed is an integrated color interpolation and color space conversion technique and apparatus. A raw image that is arranged in a Bayer pattern where each pixel has only one of the color components needed to form a full color resolution pixel may be converted using this technique directly to a XYZ space image without any intermediate conversion or interpolation steps. Specifically, in one instance, an 8-bit Bayer pattern raw image may be converted directly to a 24-bit XYZ space in a single pass approach. Such an integrated technique may more readily and inexpensively implemented in hardware such as on a digital camera, or in software.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: April 2, 2002
    Assignee: Intel Corporation
    Inventor: Tinku Acharya
  • Median computation-based integrated color interpolation and color space conversion methodology from 8-bit bayer pattern RGB color space to 12-bit YCrCb color space
    Patent number: 6356276
    Abstract: An integrated color interpolation and color space conversion technique and apparatus. A raw image that is arranged in a Bayer pattern where each pixel has only one of the color components needed to form a full color resolution pixel may be converted using this technique directly to a YCrCb image space without any intermediate conversion or interpolation steps. Specifically, in one instance, an 8-bit Bayer pattern raw image may be converted directly to a 12-bit YCrCb space in a single step approach. Such an integrated technique may more readily and inexpensively implemented in hardware such as on a digital camera, or in software.
    Type: Grant
    Filed: March 18, 1998
    Date of Patent: March 12, 2002
    Assignee: Intel Corporation
    Inventor: Tinku Acharya
  • Efficient companding algorithm suitable for color imaging
    Patent number: 6351555
    Abstract: A companding method is disclosed where a set of factors related to the color characteristics of captured images are determined. Using these characteristics, a companding scheme is developed such that each pixel is lowered in resolution, but in such a manner that the image retains important features. These factors related to color characteristics are determined in part by analyzing histograms related to the image.
    Type: Grant
    Filed: January 13, 2000
    Date of Patent: February 26, 2002
    Assignee: Intel Corporation
    Inventors: Tinku Acharya, Werner Metz