Method for differentiating dynamic range of image
View Patent ↗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 D n−1 and D n are compared. Next the minimum pixel numbers of each level value of Density units D n−1 and D n are counted. Then the minimum pixel numbers of each level value of Density units D n−1 and D n are summed. Next the ratio of total minimum pixel number and total pixel number R and a specification value R s are compared. Then whether R is smaller than R s or not is determined so as to recognize whether Density units D n−1 and D n could be differentiated or not.
1. A method for differentiating dynamic range of image, said method comprising:
comparing pixel numbers with a same level value of density units D n−1 and D n ;
counting a minimum pixel number of each level value of density units D n−1 and D n ;
summing said minimum pixel number of each level value of density units D n−1 and D n ; and
comparing a ratio of total minimum pixel number and total pixel number R with a specification value R s .
2. The method according to claim 1 , when said ratio R is smaller than said specification value R s , said density units D n−1 and D n are determined as distinguishable.
3. The method according to claim 1 , when said ratio R is not smaller than said specification value R s , said density units D n−1 and D n are determined as undistinguishable.
4. A method for differentiating dynamic range of image, said method comprising:
providing pixel-level distributions of density units D n−1 and D n ;
counting a overlap area of said pixel-level distributions of said density units D n−1 and D n ; and
comparing said overlap area with a specification value.
5. The method according to claim 4 , when said overlap area is smaller than said specification value, said density units D n−1 and D n are determined as distinguishable.
6. The method according to claim 4 , when said overlap area is not smaller than said specification value, said density units D n−1 and D n are determined as undistinguishable.