JPS5585973A - Picture processor - Google Patents

Picture processor

Info

Publication number
JPS5585973A
JPS5585973A JP16069678A JP16069678A JPS5585973A JP S5585973 A JPS5585973 A JP S5585973A JP 16069678 A JP16069678 A JP 16069678A JP 16069678 A JP16069678 A JP 16069678A JP S5585973 A JPS5585973 A JP S5585973A
Authority
JP
Japan
Prior art keywords
signal
converter
white level
scanning
bit
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
Application number
JP16069678A
Other languages
Japanese (ja)
Inventor
Norio Kanemitsu
Kiyokazu Hanatani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16069678A priority Critical patent/JPS5585973A/en
Publication of JPS5585973A publication Critical patent/JPS5585973A/en
Pending legal-status Critical Current

Links

Landscapes

  • Character Input (AREA)
  • Image Processing (AREA)

Abstract

PURPOSE:To lower the rate of misreading of OCR, by correctly correcting the variation in the white level on paper with a simple circuit constitution, in OCR unit. CONSTITUTION:After the picture signal a produced by scanning the paper 2 with the sensor 1 is amplified 3, it is converted into digital picture signal b at the A/D converter 4. After storing the signal b in the register 5 once, it is inputted to the converters 6, 8. The converter 6 takes the upper rank 4-bit signal c of the input digital signal and inputs it to the white level follower circuit 7. The converter 8 converts the 8-bit output signal of the converter 4 into 6 bits for the simplicity, outputs the signal d, and inputs it to the converter 9. In the circuit 7, when the difference of white level each bit between the scanning now and previous is within a given range, the white level obtained with the present scanning is clipped to the specified value more than a certain range and when less than a given range, the white level signal c of previous scanning is outputted to the converter 9. The converter 9 determines the concentration of multi value video signal based on the signal e and the output is outputted as the signal after correction via the register 10.
JP16069678A 1978-12-21 1978-12-21 Picture processor Pending JPS5585973A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16069678A JPS5585973A (en) 1978-12-21 1978-12-21 Picture processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16069678A JPS5585973A (en) 1978-12-21 1978-12-21 Picture processor

Publications (1)

Publication Number Publication Date
JPS5585973A true JPS5585973A (en) 1980-06-28

Family

ID=15720483

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16069678A Pending JPS5585973A (en) 1978-12-21 1978-12-21 Picture processor

Country Status (1)

Country Link
JP (1) JPS5585973A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6243781A (en) * 1985-08-20 1987-02-25 Fanuc Ltd Image processor
JPS62139083A (en) * 1985-12-13 1987-06-22 Canon Inc 2D linear interpolation circuit
JPS62174891A (en) * 1986-01-28 1987-07-31 Usac Electronics Ind Co Ltd High speed white level follower circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6243781A (en) * 1985-08-20 1987-02-25 Fanuc Ltd Image processor
JPS62139083A (en) * 1985-12-13 1987-06-22 Canon Inc 2D linear interpolation circuit
JPS62174891A (en) * 1986-01-28 1987-07-31 Usac Electronics Ind Co Ltd High speed white level follower circuit

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