| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image density estimation support device, an image density estimation device, an image forming apparatus, and a program which contribute to easy and accurate estimation of an image density. <P>SOLUTION: A first linear approximation formula V<SB POS="POST">out</SB>=a<SB POS="POST">1</SB>*V<SB POS="POST">ref</SB>+V<SB POS="POST">dark_b</SB>representing a correspondence relation between a reference voltage V<SB POS="POST">ref</SB>and a surface reflected light voltage V<SB POS="POST">out</SB>is generated (step 208), and a second linear approximation formula V<SB POS="POST">patch</SB>=a<SB POS="POST">2</SB>*V<SB POS="POST">ref</SB>+V<SB POS="POST">dark_t</SB>representing a correspondence relation between the reference voltage V<SB POS="POST">ref</SB>and an image reflected light voltage V<SB POS="POST">patch</SB>is generated (step 220). After a lower limit surface reflected light voltage V<SB POS="POST">dark_b</SB>derived from the first linear approximation formula is subtracted from a detected voltage V<SB POS="POST">b_z</SB>(step 236), a lower limit image reflected light voltage V<SB POS="POST">dark_t</SB>derived from the second linear approximation formula is subtracted from a voltage V<SB POS="POST">t_z</SB>detected in a step 234 (step 238), and a ratio (Ratio_1) of a first corrected image reflected light voltage V<SB POS="POST">t_f</SB>to a first corrected surface reflected light voltage V<SB POS="POST">b_f1</SB>is calculated. <P>COPYRIGHT: (C)2013,JPO&INPIT |
