JPS57108968A - Print reading method - Google Patents

Print reading method

Info

Publication number
JPS57108968A
JPS57108968A JP55182746A JP18274680A JPS57108968A JP S57108968 A JPS57108968 A JP S57108968A JP 55182746 A JP55182746 A JP 55182746A JP 18274680 A JP18274680 A JP 18274680A JP S57108968 A JPS57108968 A JP S57108968A
Authority
JP
Japan
Prior art keywords
prescribed value
arithmetic device
value
comparator
output
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
JP55182746A
Other languages
Japanese (ja)
Inventor
Shigeru Aiuchi
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 JP55182746A priority Critical patent/JPS57108968A/en
Publication of JPS57108968A publication Critical patent/JPS57108968A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/12—Edge-based segmentation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10004—Still image; Photographic image
    • G06T2207/10008—Still image; Photographic image from scanner, fax or copier
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30176—Document

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Character Input (AREA)

Abstract

PURPOSE:To discriminate the presence of print by scanning a print area by an image sensor, by counting the number of bits, which are greater than adjacent bits of an obtained bit by a prescribed value, in the same area, and by finding its ratio. CONSTITUTION:The output of an image sensor 1 is amplified by an amplifier 3 and converted into a digital signal by an A/D converter 4. This signal is set in a register 5 and then transferred to a register 6 by a next CL3. A difference in contents between the registers 5 and 6 is found by an arithmetic device 7 and compared with a prescribed value X by a comparator 8 and when the difference is greater than or equal to the prescribed value X, it is counted by a counter 9. Similarly, the output of the arithmetic device 7 is compared with a prescribed value Y by a comparator 10. This value Y is small and even a small temperature difference is counted by a counter 11. Outputs A and B from the counters 9 and 11 are operated by an arithmetic device 12. A comparator 13 compares the output of the arithmetic device 12 with a prescribed value X and when it is greater than the value X, it is judged that a character is present, preventing double-printing operation.
JP55182746A 1980-12-25 1980-12-25 Print reading method Pending JPS57108968A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55182746A JPS57108968A (en) 1980-12-25 1980-12-25 Print reading method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55182746A JPS57108968A (en) 1980-12-25 1980-12-25 Print reading method

Publications (1)

Publication Number Publication Date
JPS57108968A true JPS57108968A (en) 1982-07-07

Family

ID=16123705

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55182746A Pending JPS57108968A (en) 1980-12-25 1980-12-25 Print reading method

Country Status (1)

Country Link
JP (1) JPS57108968A (en)

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