JPH0197665U - - Google Patents

Info

Publication number

JPH0197665U

JPH0197665U JP19306787U JP19306787U JPH0197665U JP H0197665 U JPH0197665 U JP H0197665U JP 19306787 U JP19306787 U JP 19306787U JP 19306787 U JP19306787 U JP 19306787U JP H0197665 U JPH0197665 U JP H0197665U

Authority

JP

Japan

Prior art keywords

predetermined position

document reading

reflective

reading device

shading correction

Prior art date

1987-12-18

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Pending

Links

• Espacenet
• Global Dossier
• Discuss

• 238000003705 background correction Methods 0.000 claims description 9
• 238000010586 diagram Methods 0.000 description 7
• 238000009792 diffusion process Methods 0.000 description 1
• 239000011521 glass Substances 0.000 description 1
• 230000003287 optical effect Effects 0.000 description 1