KR960009796B1 - Image signal processing apparatus and control method - Google Patents

Image signal processing apparatus and control method Download PDF

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Publication number
KR960009796B1
KR960009796B1 KR93005325A KR930005325A KR960009796B1 KR 960009796 B1 KR960009796 B1 KR 960009796B1 KR 93005325 A KR93005325 A KR 93005325A KR 930005325 A KR930005325 A KR 930005325A KR 960009796 B1 KR960009796 B1 KR 960009796B1
Authority
KR
South Korea
Prior art keywords
reference voltage
data
image signal
middle tone
processing apparatus
Prior art date
Application number
KR93005325A
Other languages
Korean (ko)
Other versions
KR940023154A (en
Inventor
Koo-Soo Kang
Seung-Bum Yang
Original Assignee
Samsung Electronics Co 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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Priority to KR93005325A priority Critical patent/KR960009796B1/en
Publication of KR940023154A publication Critical patent/KR940023154A/en
Application granted granted Critical
Publication of KR960009796B1 publication Critical patent/KR960009796B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41—Bandwidth or redundancy reduction
    • H04N1/4105—Bandwidth or redundancy reduction for halftone screened pictures
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels

Abstract

The apparatus includes an A/D converter(14) for digitalizing an analog image signal outputted from an image sensor(10) into image data in the scale range according to the reference voltage; a controller for outputting data of the initially determined reference voltage, sequentially storing the image data in an inner memory and detecting the maximum value among the data stored in the memory to generate middle tone reference level data corresponding to the middle tone processing reference voltage; and a reference voltage supplying unit for converting the middle tone reference level data into an analog signal to supply it to the A/D converter as the reference voltage.
KR93005325A 1993-03-31 1993-03-31 Image signal processing apparatus and control method KR960009796B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR93005325A KR960009796B1 (en) 1993-03-31 1993-03-31 Image signal processing apparatus and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR93005325A KR960009796B1 (en) 1993-03-31 1993-03-31 Image signal processing apparatus and control method

Publications (2)

Publication Number Publication Date
KR940023154A KR940023154A (en) 1994-10-22
KR960009796B1 true KR960009796B1 (en) 1996-07-24

Family

ID=19353238

Family Applications (1)

Application Number Title Priority Date Filing Date
KR93005325A KR960009796B1 (en) 1993-03-31 1993-03-31 Image signal processing apparatus and control method

Country Status (1)

Country Link
KR (1) KR960009796B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7535601B2 (en) 2003-11-28 2009-05-19 Samsung Electronics Co., Ltd. Image scanning device for converting an analog signal into a digital signal corresponding to an operation mode and a method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7535601B2 (en) 2003-11-28 2009-05-19 Samsung Electronics Co., Ltd. Image scanning device for converting an analog signal into a digital signal corresponding to an operation mode and a method thereof

Also Published As

Publication number Publication date
KR940023154A (en) 1994-10-22

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