05454044 is referenced by 51 patents and cites 12 patents.

With a method for compressing a dynamic range of an image, an original image signal Sorg representing an original image is processed, and a processed image signal Sproc representing an image having a narrower dynamic range than the original image is thereby generated. The method comprises the steps of calculating the value of an unsharp mask signal Sus corresponding to each of picture elements in the original image by averaging the values of image signal components of the original image signal Sorg, which image signal components represent the picture elements belonging to a predetermined region surrounding each picture element. Values of the processed image signal Sproc are calculated with the formula

Title
Apparatus for enhancing image data using a monotonously decreasing function
Application Number
646123
Publication Number
5454044
Application Date
April 8, 1994
Publication Date
September 26, 1995
Inventor
Nobuyoshi Nakajima
Kanagawa
JP
Agent
Sughrue Mion Zinn Macpeak & Seas
Agent
Steven M Gruskin
Richard C Turner
Assignee
Fuji Photo Film
JP
IPC
G06K 9/36
View Original Source