公开(公告)号：JPH11312239A

公开(公告)日：1999-11-09

申请号：JP37282398

申请日：1998-12-28

Applicant: ST MICROELECTRONICS SRL

Inventor： COLLA FEDERICA ,  MANCUSO MASSIMO ,  POLUZZI RINALDO

IPC: G03B27/73 ,  G06T5/00 ,  G06T7/40 ,  H04N9/64

Abstract: PROBLEM TO BE SOLVED: To provide a digital image color correcting device for correcting facial tone image parts of a digital video image by adopting fuzzy logic. SOLUTION: This device includes a pixel fuzzy fine unit 1 for receiving a pixel stream belonging to a sequence of correlated frames of a digital video image and for calculating a multilevel value representing the membership of each pixel with respect to a skin color class, a global parameter estimator 2 for receiving each pixel and a relative membership value and for calculating first and second parameters regulating the feature of an image belonging to the skin color class, a processing unit 3 for correcting each of the pixels of the part of the image belonging to the skin color class according to the first global parameter, and a processing switch 4 for outputting pixels or corrected pixels in accordance with the second global parameter.

公开(公告)号：DE69721790D1

公开(公告)日：2003-06-12

申请号：DE69721790

申请日：1997-12-30

Applicant: ST MICROELECTRONICS SRL

Inventor： COLLA FEDERICA ,  MANCUSO MASSIMO ,  POLUZZI RINALDO

IPC: G03B27/73 ,  G06T5/00 ,  G06T7/40 ,  H04N9/64 ,  G06T1/00

Abstract: A digital image color correction device employing fuzzy logic, for correcting a facial tone image portion of a digital video image, characterized in that it comprises: a pixel fuzzifier unit (1) receiving in input a stream of pixels belonging to a sequence of correlated frames of a digital video image and computing a multi level value representing a membership of each pixel to a skin color class; a global parameter estimator (2) receiving in input each of said pixel and the relative membership value, and computing a first and a second parameter which define the characteristics of a portion of said image that belongs to said skin color class; a processing unit (3) connected downstream to said global parameter estimator and to said pixel fuzzifier unit and adapted to correct each of the pixels of said portion of the image that belongs to said skin color class, according to said first global parameter (300), to obtain corrected pixels; and a processing switch (4) for outputting said pixels or said corrected pixels according to said second global parameter (400).