Peng Shelly Gao

US Patent:

20130294706, Nov 7, 2013

Filed:

May 4, 2012

Appl. No.:

13/464854

Inventors:

Thomas Maurer - Redlands CA, US
Peng Gao - Redlands CA, US
Peter Becker - Redlands CA, US

Assignee:

Environmental Systems Research Institute (ESRI) - Redlands CA

International Classification:

G06T 9/00

US Classification:

382251, 382232

Abstract:

Embodiments of the invention relate to an image or raster compression method that includes receiving pixel data for a raster comprising a two dimensional (2D) array of pixels where each pixel is associated with a data value. The method further includes receiving a user defined parameter defining a maximum error allowable per pixel for a compression algorithm. The raster can be divided into a number of pixel blocks where each pixel can be quantized and bit stuffed based on a number of block statistics including the maximum error allowable. The method further includes executing the compression algorithm wherein for each pixel, where an error caused by the compression algorithm is equal to or less than the maximum error allowable, and encoding the pixel data based on the compression algorithm. In certain embodiments, the compression algorithm is a non-transform compression algorithm.

US Patent:

20160127746, May 5, 2016

Filed:

Jan 14, 2016

Appl. No.:

14/996024

Inventors:

- Redlands CA, US
Peng Gao - Redlands CA, US
Peter Becker - Redlands CA, US

International Classification:

H04N 19/65
H04N 19/91
H04N 19/124
H04N 19/176
H04N 19/463

Abstract:

Embodiments of the invention relate to an image or raster compression method for a multi-dimensional array of pixels. A user specifies a maximum error allowable per pixel for the compression algorithm. The raster is divided into a number of pixel blocks where each pixel is quantized and bit stuffed based on a number of block statistics including the maximum error allowable. The size of the pixel blocks is limited to two (e.g., 8×8 and 16×16) to save processing time with little difference in compression. A Look-Up Table (LUT) is used instead for certain types of data where it is more efficient.

US Patent:

20150382004, Dec 31, 2015

Filed:

Mar 2, 2015

Appl. No.:

14/636047

Inventors:

- Redlands CA, US
Peng Gao - Redlands CA, US
Peter Becker - Redlands CA, US

International Classification:

H04N 19/463
H04N 19/176
H04N 19/65
H04N 19/124

Abstract:

Embodiments of the invention relate to an image or raster compression method that includes receiving pixel data for a raster comprising a two dimensional (2D) array of pixels where each pixel is associated with a data value. The method further includes receiving a user defined parameter defining a maximum error allowable per pixel for a compression algorithm. The raster can be divided into a number of pixel blocks where each pixel can be quantized and bit stuffed based on a number of block statistics including the maximum error allowable. The method further includes executing the compression algorithm wherein for each pixel, where an error caused by the compression algorithm is equal to or less than the maximum error allowable, and encoding the pixel data based on the compression algorithm. In certain embodiments, the compression algorithm is a non-transform compression algorithm.

Author:

Peng Gao

ISBN #:

7542010808