Sheng Wei G Lin

US Patent:

7233268, Jun 19, 2007

Filed:

Jun 3, 2006

Appl. No.:

11/422071

Inventors:

Lekun Lin - San Jose CA, US
Sheng Lin - Sunnyvale CA, US

Assignee:

RDW, Inc. - Milpitas CA

International Classification:

H03M 7/00

US Classification:

341 61, 341143

Abstract:

Architectures of multi-stage sample rate converters are disclosed. According to one aspect of the present invention, a received signal with a higher sampling rate is converted to a lower sampling rate. To prevent aliasing in the resultant signal, an anti-aliasing filter is introduced. The passband of the anti-aliasing filter is so adjusted according to the conversation rate of a sample rate converter. To keep the implementation relatively simple, the coefficients of the filter are kept constant. Therefore, the conversation rate of a sample rate converter is constrained in a limited range, thus requiring only a constant anti-aliasing filter. A series of halfband filters are then used to convert the signal to a desired sampling rate.

US Patent:

7496235, Feb 24, 2009

Filed:

Aug 3, 2005

Appl. No.:

11/195689

Inventors:

Sheng Lin - Sunnyvale CA, US

Assignee:

Micron Technology, Inc. - Boise ID

International Classification:

G06K 9/36

US Classification:

382232

Abstract:

A re-order buffer memory in a real-time application such as e. g. , an imager. Initially, input data is written into the re-order buffer using a first addressing mode, which causes the data to be stored in a line-by-line manner. Prior to receiving the last line of input data, the stored data is read-out in blocks of data that spans multiples lines in the buffer. This frees up space in the re-order buffer. Subsequently received input data is written into the re-order buffer using a second addressing mode, which stores the newly received data in vertical segments of the re-order buffer whose stored data has already been read-out. Writing/reading of the re-order buffer alternates between the first and second addressing modes. Using this technique, a single buffer may be used to input new data while existing data is being read-out.

US Patent:

7542614, Jun 2, 2009

Filed:

Jun 6, 2007

Appl. No.:

11/758910

Inventors:

Amnon Silverstein - Mountain View CA, US
Sheng Lin - Sunnyvale CA, US
Dong Li - Cupertino CA, US

Assignee:

Micron Technology, Inc. - Boise ID

International Classification:

G06K 9/36

US Classification:

382232

Abstract:

Apparatus, systems, and methods disclosed herein may estimate the magnitude of relative motion between a scene and an image capture device used to capture the scene. Some embodiments may utilize discrete cosine transform and/or Sobel gradient techniques to identify one or more blocks of pixels in an originating calibration image frame. Matching blocks of pixels may be located in a successive calibration image frame. Motion vectors originating at one calibration frame and terminating at the other calibration frame may be calculated. The magnitude of relative motion derived thereby may be used to adjust image capture parameters associated with the image capture device, including exposure settings.

US Patent:

7599566, Oct 6, 2009

Filed:

Jun 6, 2007

Appl. No.:

11/758815

Inventors:

Amnon Silverstein - Mountain View CA, US
Sheng Lin - Sunnyvale CA, US
Dong Li - Cupertino CA, US

Assignee:

Aptina Imaging Corporation - George Town

International Classification:

G06K 9/36

US Classification:

382238

Abstract:

Apparatus, systems, and methods disclosed herein may estimate the magnitude of relative motion between a scene and an image capture device used to capture the scene. Some embodiments may utilize discrete cosine transform and/or Sobel gradient techniques to identify one or more blocks of pixels in an originating calibration image frame. Matching blocks of pixels may be located in a successive calibration image frame. Motion vectors originating at one calibration frame and terminating at the other calibration frame may be calculated. The magnitude of relative motion derived thereby may be used to adjust image capture parameters associated with the image capture device, including exposure settings.

US Patent:

7747090, Jun 29, 2010

Filed:

Jan 23, 2009

Appl. No.:

12/358343

Inventors:

Sheng Lin - Sunnyvale CA, US

Assignee:

Micron Technology, Inc. - Boise ID

International Classification:

G06K 9/36

US Classification:

382232

Abstract:

A re-order buffer memory in a real-time application such as e. g. , an imager. Initially, input data is written into the re-order buffer using a first addressing mode, which causes the data to be stored in a line-by-line manner. Prior to receiving the last line of input data, the stored data is read-out in blocks of data that spans multiples lines in the buffer. This frees up space in the re-order buffer. Subsequently received input data is written into the re-order buffer using a second addressing mode, which stores the newly received data in vertical segments of the re-order buffer whose stored data has already been read-out. Writing/reading of the re-order buffer alternates between the first and second addressing modes. Using this technique, a single buffer may be used to input new data while existing data is being read-out.

US Patent:

7920746, Apr 5, 2011

Filed:

Apr 23, 2007

Appl. No.:

11/738897

Inventors:

Amnon Silverstein - Mountain View CA, US
Sheng Lin - Sunnyvale CA, US
Brian Rodricks - Los Gatos CA, US

Assignee:

Aptina Imaging Corporation - George Town

International Classification:

G06K 9/36
G06K 9/46

US Classification:

382232

Abstract:

Apparatus, systems, and methods disclosed herein may transpose image blocks from successively-captured versions of an image according to relative movement between an image capture device and the scene being captured. The transposition may provide for alignment of the successively-captured images notwithstanding the movement. The transposed image blocks from the successive images are composited in the frequency domain by integrating frequency domain coefficients from each into a composite final image. Additional embodiments are disclosed.

US Patent:

7924316, Apr 12, 2011

Filed:

Mar 14, 2007

Appl. No.:

11/717954

Inventors:

Amnon Silverstein - Mountain View CA, US
Sheng Lin - Sunnyvale CA, US
Dong Li - Cupertino CA, US

Assignee:

Aptina Imaging Corporation - George Town

International Classification:

H04N 5/228

US Classification:

3482084

Abstract:

Apparatus, systems, and methods disclosed herein may estimate the magnitude of relative motion between a scene and an image capture device used to capture the scene. Some embodiments may utilize discrete cosine transform and/or Sobel gradient techniques to identify one or more blocks of pixels in an originating calibration image frame. Matching blocks of pixels may be located in a successive calibration image frame. Motion vectors originating at one calibration frame and terminating at the other calibration frame may be calculated. The magnitude of relative motion derived thereby may be used to adjust image capture parameters associated with the image capture device, including exposure settings.

US Patent:

7924317, Apr 12, 2011

Filed:

Mar 12, 2008

Appl. No.:

12/046860

Inventors:

Sheng Lin - Sunnyvale CA, US

Assignee:

Aptina Imaging Corporation - George Town

International Classification:

H04N 5/228

US Classification:

3482084, 3482086, 34820899, 382232, 382250, 382251, 37524008, 3752402

Abstract:

A method and apparatus for reducing motion blur in digital images. An imager captures a reference frame and a plurality of target frames. Feature blocks preferably containing strong two-dimensional features are identified in the reference frame. Corresponding features are identified in the target frames and motion vectors representing the movement of features are calculated. Based at least in part on the motion vectors, corresponding pixels in the reference and target frames are identified and combined to form an output image. Efficient methods for identifying corresponding features in apparatuses with small buffer memories by serially processing frame strips are also disclosed.