Daniel E Taylor

US Patent:

7139426, Nov 21, 2006

Filed:

Jan 7, 2003

Appl. No.:

10/338206

Inventors:

Kevin T. Ivers - Woodland WA, US
Paul M. Gerlach - Beaverton OR, US
Daniel E. Taylor - Beaverton OR, US

Assignee:

Tektronix, Inc. - Beaverton OR

International Classification:

G06K 9/00

US Classification:

382169

Abstract:

A system is disclosed for equalizing the distribution of pixel intensities in an image displayed by an oscilloscope. In a primarily software implementation, the maximum pixel intensity (I) present in the rasterized input image, the maximum available display intensity (P) and the desired image resolution (R) are the input variables which permit the calculation of thresholds or bins to which each pixel is assigned. By iteratively performing the analysis of existing pixel intensities and bin thresholds, the number of pixels in each bin may be optimized to form an equalized histogram. Another implementation of the histogram equalization system utilizes software to optimize a hardware-based histogram collector.

US Patent:

8223151, Jul 17, 2012

Filed:

Jan 25, 2008

Appl. No.:

12/019833

Inventors:

Keith D. Rule - Beaverton OR, US
Thomas L. Freeman - Beaverton OR, US
Daniel E. Taylor - Beaverton OR, US
Timothy D. Margeson - Vancouver WA, US
Scott R. Ketterer - Beaverton OR, US

Assignee:

Tektronix, Inc. - Beaverton OR

International Classification:

G06T 11/20

US Classification:

345440, 345441

Abstract:

A method of analysis of long record length data using mark duration includes displaying together with a portion of the long record length data each mark that identifies a specified feature of interest together with the mark duration. Associated with the mark may be text identifying the feature of interest, measurement values associated with the duration of the mark, or a combination thereof. Multiple sets of marks may be generated for the long record length data, which sets may be combined to generate new marks with duration. The marks also may be filtered to further refine the marks to be displayed according to user specified criteria. In this way analysis of long record length data representing an acquired signal may be readily automated so a user may move from one interesting event to another without having to pan through the long record length data.