公开(公告)号：US20180270493A1

公开(公告)日：2018-09-20

申请号：US15754713

申请日：2016-08-22

Applicant: UNIVERSITY OF WARWICK

Inventor： Alan CHALMERS ,  Jonathan HATCHETT ,  Joshua MCNAMEE ,  Kurt DEBATTISTA

IPC: H04N19/46 ,  H04N19/184 ,  H04N19/172 ,  H04N19/34

CPC classification number: H04N19/46 ,  G09G2320/0276 ,  H04N19/172 ,  H04N19/184 ,  H04N19/34

Abstract: A method of compressing and decompressing High Dynamic Range images utilising the relationship: (I) Where γ≥2.5; and (II)=compressed; and (III)=linear [ R G B ] c = [ R G B ] l 1 γ  [ R G B ] l = [ R G B ] c γ ( I ) [ · · · ] c ( II ) [ · · · ] l ( III )

公开(公告)号：US20170094281A1

公开(公告)日：2017-03-30

申请号：US15310914

申请日：2015-05-14

Applicant: THE UNIVERSITY OF WARWICK

Inventor： Alan CHALMERS ,  Kurt DEBATTISTA ,  Elmedin SELMANOVIC ,  Thomas BASHFORD-ROGERS

IPC: H04N19/14 ,  H04N19/126

CPC classification number: H04N19/14 ,  H04N19/124 ,  H04N19/126 ,  H04N19/182 ,  H04N19/184 ,  H04N19/186 ,  H04N19/30 ,  H04N19/46

Abstract: A method of compressing a high dynamic range original image to provide compressed image data for use with (i) a high dynamic range decoder for viewing the high dynamic range image and (ii) a reduced bit depth decoder for viewing an image of lower dynamic range which has been derived from the high dynamic range original image. The difference between the image of the high dynamic range original image and the lower dynamic range is measured and that difference information is compressed. Compressed image data is produced comprising the compressed image of the lower dynamic range and the compressed image data.