Method and apparatus for analysing image data to quantify prior blockbased processing of the data
US8743968B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 13, 2011 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Sep 20, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30168
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of analyzing image data to quantify prior block-based processing comprises processing a set of pixel values derived from the image data to generate a spatial difference profile along a line perpendicular to assumed block edges, the spatial difference profile representing differences between values of pixels spaced spatially in a direction parallel to said line; summing the spatial difference profile in a direction perpendicular to that line; measuring inter-maxima distances in the spatial difference profile to a fractional precision in pixel spacing units; and aggregating measured inter-maxima distances to determine a block size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.