JPS5775379A - Quantizing circuit - Google Patents
Quantizing circuitInfo
- Publication number
- JPS5775379A JPS5775379A JP55150762A JP15076280A JPS5775379A JP S5775379 A JPS5775379 A JP S5775379A JP 55150762 A JP55150762 A JP 55150762A JP 15076280 A JP15076280 A JP 15076280A JP S5775379 A JPS5775379 A JP S5775379A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- tone
- output
- gradation
- quantization
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
- G06V30/16—Image preprocessing
- G06V30/162—Quantising the image signal
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
Landscapes
- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Character Input (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
PURPOSE:To ensure the effective use of a small number of tone wedges of quantization, by changing how to set the tone wedge according to the gradation of characters. CONSTITUTION:The width of a tone wedge is varied for quantization in accordance with the gradation of a picture when the picture output to be optically read is converted into an electric signal and then into a digital signal. For instance, converters 10a-10n are set in parallel to each other in an A/D converter and the input analog signal is supplied to each converter. At the same time, the white level input receives a division of voltasge through resistances 11a-11n and converted into a reference signal. This reference signal is applied to the other input terminal of each converter. Then a resistance 13 is varied by a transistor 12 to change the width of the tone wedge. The output of each converter is coded by an encoder 14 and turned into a quantized video output of 4 bits and 16 tone wedges.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55150762A JPS5775379A (en) | 1980-10-29 | 1980-10-29 | Quantizing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55150762A JPS5775379A (en) | 1980-10-29 | 1980-10-29 | Quantizing circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5775379A true JPS5775379A (en) | 1982-05-11 |
Family
ID=15503851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55150762A Pending JPS5775379A (en) | 1980-10-29 | 1980-10-29 | Quantizing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5775379A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6024406A (en) * | 1983-07-20 | 1985-02-07 | Kawasaki Steel Corp | Surface-irregularity analyzing device |
JPS60125060A (en) * | 1983-12-09 | 1985-07-04 | Canon Inc | Image signal processor |
JPS60125064A (en) * | 1983-12-09 | 1985-07-04 | Canon Inc | Image signal processor |
JPS61115182A (en) * | 1984-11-10 | 1986-06-02 | Nec Corp | Graphic quantization device |
JPS61205081A (en) * | 1985-03-08 | 1986-09-11 | Casio Comput Co Ltd | Analog-to-digital converting circuit for video signal |
JPS6368065U (en) * | 1982-09-27 | 1988-05-07 |
-
1980
- 1980-10-29 JP JP55150762A patent/JPS5775379A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6368065U (en) * | 1982-09-27 | 1988-05-07 | ||
JPS6024406A (en) * | 1983-07-20 | 1985-02-07 | Kawasaki Steel Corp | Surface-irregularity analyzing device |
JPS60125060A (en) * | 1983-12-09 | 1985-07-04 | Canon Inc | Image signal processor |
JPS60125064A (en) * | 1983-12-09 | 1985-07-04 | Canon Inc | Image signal processor |
JPH0515104B2 (en) * | 1983-12-09 | 1993-02-26 | Canon Kk | |
JPS61115182A (en) * | 1984-11-10 | 1986-06-02 | Nec Corp | Graphic quantization device |
JPS61205081A (en) * | 1985-03-08 | 1986-09-11 | Casio Comput Co Ltd | Analog-to-digital converting circuit for video signal |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR890011227A (en) | Digital to Analog Converter | |
ATE136704T1 (en) | DIGITAL TO ANALOG CONVERTER | |
JPS5775379A (en) | Quantizing circuit | |
JPS56141620A (en) | Output error compensating circuit of digital-to-analog converter | |
ATE41084T1 (en) | ANALOG TO DIGITAL CONVERTER. | |
JPS5757088A (en) | Adaptive quantization circuit | |
JPS5624825A (en) | Analog-digital converting circuit | |
JPS5725722A (en) | Analog-to-digital converter | |
JPS57140026A (en) | Digital-to-analog converting circuit | |
JPS57168581A (en) | Adaptive quantizing circuit | |
JPS5797222A (en) | Nonlinear analog-to-digital converter | |
JPS57152726A (en) | A/d converting circuit | |
JPS5558672A (en) | Digital facsimile unit | |
JPS54150013A (en) | Digital signal transmission system | |
JPS57207425A (en) | Digital-to-analog converting circuit | |
JPS642100A (en) | Digital distortion adding device | |
JPS57119516A (en) | Digital to analog converter | |
GB1135342A (en) | Converter for coded electrical signals | |
KR880006886A (en) | Facsimile Backline Skipping Method and Apparatus | |
JPS56162534A (en) | Analog-to-digital and digital-to-analog converter circuit | |
JPS57161981A (en) | White level follower circuit | |
JPS579127A (en) | Forecasting encoding device | |
JPS5564472A (en) | Quantizing unit for picture signal | |
JPS5725721A (en) | Digital-to-analog converter | |
JPS57125520A (en) | Linear-nonlinear digital signal converter |