JPS5668874A - Initial value set system of white level follower circuit - Google Patents
Initial value set system of white level follower circuitInfo
- Publication number
- JPS5668874A JPS5668874A JP14475879A JP14475879A JPS5668874A JP S5668874 A JPS5668874 A JP S5668874A JP 14475879 A JP14475879 A JP 14475879A JP 14475879 A JP14475879 A JP 14475879A JP S5668874 A JPS5668874 A JP S5668874A
- Authority
- JP
- Japan
- Prior art keywords
- maximum value
- initial value
- circuit
- white level
- binary number
- Prior art date
- 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.)
- Granted
Links
Landscapes
- Character Input (AREA)
Abstract
PURPOSE: To give the number of degrees of freedom to form design, by detecting the maximum value of the optical reflection factor in a designated area of the input picture and by determining an initial value of the white level follower circuit on a basis of this detected maximum value and by setting the initial value with a simple circuit constituion.
CONSTITUTION: The input picture of form 1 is scanned by image sensor 3, and the picture signal which was subjected to photoelectric conversion is applied to A/D converter 5 through amplifier 4 and is quantized to a binary. The output of converter 5 is supplied to encoder 20, and the picture signal is converted to the binary number of prescribed bits, and the binary number is supplied to maximum value detecting circuit 21. The maximum value of the optical reflection factor in a designated area of the input picture is detected by detecting circuit 21 and memory 22, and this detected maximum value is input to converting circuit 23 and is converted to the binary number of prescribed bits, and this converted binary number is defined as the initial set value of the white level (reference voltage), thus setting the initial value with a simple circuit to give the number of degrees of freedom to form design.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14475879A JPS5668874A (en) | 1979-11-08 | 1979-11-08 | Initial value set system of white level follower circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14475879A JPS5668874A (en) | 1979-11-08 | 1979-11-08 | Initial value set system of white level follower circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5668874A true JPS5668874A (en) | 1981-06-09 |
JPS619672B2 JPS619672B2 (en) | 1986-03-25 |
Family
ID=15369704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14475879A Granted JPS5668874A (en) | 1979-11-08 | 1979-11-08 | Initial value set system of white level follower circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5668874A (en) |
-
1979
- 1979-11-08 JP JP14475879A patent/JPS5668874A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS619672B2 (en) | 1986-03-25 |
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