Patent · US Active

Classifying an image's compression level

US8452110B2 · kind B2 · utility

56Cited by

29References

30Claims

0Family size

Assignee

I.C.V.T. Ltd. · IL

Inventors

Sharon Carmel · Ramat HaSharon, IL
Dror Gill · Haifa, IL
Tamar Shoham · Netanya, IL

Key dates

Filing date	Mar 31, 2011
Grant date	May 28, 2013
Priority date	—
Expiry date	Sep 13, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/86
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method of classifying a compressed input image's compression level, comprising applying inverse quantization to DCT coefficients extracted from the compressed input image, giving rise to dequantized DCT coefficients, applying a threshold to the dequantized DCT coefficients, and determining a compression level classification for the compressed input image according to a relation among the threshold and at least one of the dequantized DCT coefficients.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.