JPS5729486A - Detecting system of concentration of printed character - Google Patents

Detecting system of concentration of printed character

Info

Publication number
JPS5729486A
JPS5729486A JP10397480A JP10397480A JPS5729486A JP S5729486 A JPS5729486 A JP S5729486A JP 10397480 A JP10397480 A JP 10397480A JP 10397480 A JP10397480 A JP 10397480A JP S5729486 A JPS5729486 A JP S5729486A
Authority
JP
Japan
Prior art keywords
value
concentration
difference
register
cnt
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
Application number
JP10397480A
Other languages
Japanese (ja)
Other versions
JPH0330515B2 (en
Inventor
Kazumasa Moriya
Kazuyoshi Okawa
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 JP10397480A priority Critical patent/JPS5729486A/en
Publication of JPS5729486A publication Critical patent/JPS5729486A/en
Publication of JPH0330515B2 publication Critical patent/JPH0330515B2/ja
Granted legal-status Critical Current

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Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)

Abstract

PURPOSE: To detect correctly the concentration of a printed character regardless of its shape when the concentration of the character is detected by a method wherein detection on whether each bit of an image sensor exceeds a threshold value and detection of difference of concentration between adjoining bits are combined.
CONSTITUTION: Outputs from an image sensor IMS composed of a plurality of photoelectric detective elements PH arranged are converted by an A/D converter into a multiple-value signal, set to a progressive register RG-A and then a register RG-B at next timing. The difference between the set values of both registers or the difference between the concentrations of the adjoining bits is obtained by a subtractive calculator SUB and when the value exceeds an intended value X it is calculated by a counter CNT1. On one hand, a value Q of the register RG-A is compared with a threshold value Y and when Y≤Q, that is, when the bit is on the black level it is calculated by a counter CNT2. Outputs CR and CV from both counters CNT1, CNT2 are in a near proportional relation regardless of the shape of character. When a ribbon has become light, a value CR changes exceedingly in comparison with a value CV, then an alarm is given by a processor PRC.
COPYRIGHT: (C)1982,JPO&Japio
JP10397480A 1980-07-29 1980-07-29 Detecting system of concentration of printed character Granted JPS5729486A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10397480A JPS5729486A (en) 1980-07-29 1980-07-29 Detecting system of concentration of printed character

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10397480A JPS5729486A (en) 1980-07-29 1980-07-29 Detecting system of concentration of printed character

Publications (2)

Publication Number Publication Date
JPS5729486A true JPS5729486A (en) 1982-02-17
JPH0330515B2 JPH0330515B2 (en) 1991-04-30

Family

ID=14368296

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10397480A Granted JPS5729486A (en) 1980-07-29 1980-07-29 Detecting system of concentration of printed character

Country Status (1)

Country Link
JP (1) JPS5729486A (en)

Also Published As

Publication number Publication date
JPH0330515B2 (en) 1991-04-30

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