Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 24, 2009
Patent Application Number
11834522
Date Filed
August 6, 2007
Patent Primary Examiner
Patent abstract
A method for differentiating dynamic range of image is disclosed. The method comprises the following steps. First of all, pixel numbers with the same level value of Density units Dn-1 and Dn are compared. Next the minimum pixel number of each level value of Density units Dn-1 and Dn are counted. Then the minimum pixel numbers of each level value of Density units Dn-1 and Dn are summed. Next the ratio of total minimum pixel number and total pixel number R and a specification value Rs are compared. Then whether R is smaller than Rs or not is determined so as to recognize whether Density units Dn-1 and Dn could be differentiated or not.
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