KR930010146B1 - Picture processing method for fax - Google Patents

Picture processing method for fax Download PDF

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KR930010146B1
KR930010146B1 KR1019870013660A KR870013660A KR930010146B1 KR 930010146 B1 KR930010146 B1 KR 930010146B1 KR 1019870013660 A KR1019870013660 A KR 1019870013660A KR 870013660 A KR870013660 A KR 870013660A KR 930010146 B1 KR930010146 B1 KR 930010146B1
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South Korea
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signal
output
flip
flop
terminal
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KR1019870013660A
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Korean (ko)
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KR890009170A (en
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한영진
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주식회사 금성사
최근선
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41Bandwidth or redundancy reduction
    • H04N1/411Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures

Abstract

This invention concerns the image processing method for high resolution using a half-tone methods. The H.T. signal of the system control part is added to J-K flip flops (10,11) and an H.T. processing part, and the line enable signal is added to the clock node in J-K flip flop (11). The clock signal is added to AND gate and J-K flip flop (10) and output of J-K F.F (10) is added to the other input node of AND gate. The output of F.F (11) is added to the line memory (8) and the strobe mode of data selector.

Description

팩시밀리의 화상처리방법Facsimile image processing method

제 1 도는 종래 팩시밀리의 화상처리블록도.1 is an image processing block diagram of a conventional facsimile.

제 2 도는 제 1 도의 파형도.2 is a waveform diagram of FIG.

제 3 도는 본 발명에 다른 팩시밀리의 화상처리블록도.3 is an image processing block diagram of a facsimile according to the present invention.

제 4 도는 제 3 도의 각부 파형도.4 is a waveform diagram of each part of FIG.

제 5 도는 본 발명에 따른 화신호 출력표.5 is a signal output table according to the present invention.

제 6 도는 본 발명에 따른 데이타 셀렉터의 기능테이블표.6 is a function table table of a data selector according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 화신호처리부 5 : 중간조처리부1: signal processing unit 5: intermediate tone processing unit

6 : 2진 처리부 7 : 시스템제어부6: binary processing unit 7: system control unit

8 : 라인메모리 9 : 데이타 셀렉터8: line memory 9: data selector

10, 11 : J-K플립플롭 12 : 버퍼10, 11 J-K flip-flop 12: buffer

13 : 앤드게이트13: ANDGATE

본 발명은 팩시밀리의 화상처리방식에 관한 것으로 특히 중간조(Half Tone)방식으로 화상을 처리하여 고해상도에 적당하도록 한 화상처리방식에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing method of a facsimile, and more particularly, to an image processing method in which an image is processed in a half tone method to be suitable for high resolution.

종래의 팩시밀리장치에 있어 화상처리방식의 구성은 제 1 도에서 보는 바와같이, 화상을 광전변환하는 CCD(Charge Coupled Device)부(2)의 출력은 A/D변환기(3)를 거쳐 화상보정기(4)에 인가되도록 화신호처리부(1)를 구성하고, 화신호처리부(1)의 화상보정기(4) 출력은 중간조처리부(5)와 2진 처리부(6)에 각각 거쳐 시스템제어부(7)에 비데오신호(V.S)로 인가되고, 시스템제어부(7)는 중간조(H.T)와 스탠다드(STD)신호를 중간조처리부(5)와 2진 처리부(6)에 각각 인가하는 구성으로, 상기 구성의 동작상태를 살펴보면, 원고를 전송하기 위해 화상을 독취할 때에 CCD부(2)는 제 2a 도와 같은 라인 인에이블(Line Enable)(LE)신호에 의해 원고의 1라인에 해당하는 데이타를 축적하게 되고 이렇게 축적된 신호는 제 2b 도의 클럭신호에 맞추어 CCD부(2)의 출력단으로 아날로그신호를 출력시키게 된다.In the conventional facsimile apparatus, the configuration of the image processing method is shown in FIG. 1, and the output of the CCD (Charge Coupled Device) unit 2 for photoelectric conversion of the image is passed through the A / D converter 3 to the image compensator ( The speech signal processing section 1 is configured to be applied to 4), and the output of the image corrector 4 of the speech signal processing section 1 is passed through the intermediate tone processing section 5 and the binary processing section 6, respectively. Is applied as a video signal VS, and the system controller 7 applies the half-tone HT and the standard-STD signals to the half-tone processing section 5 and the binary processing section 6, respectively. Referring to the operation state of, the CCD unit 2 accumulates data corresponding to one line of the original by the Line Enable (LE) signal as shown in FIG. 2a when the image is read to transmit the original. The accumulated signal outputs an analog signal to the output terminal of the CCD unit 2 in accordance with the clock signal of FIG. 2B. It is kige.

상기 출력된 아날로그신호는 A/D변환기(3)를 거쳐 디지탈신호로 변환되어 화상보정기(4)에 인가되므로 1라인의 상태(1형광등의 상태, 원고배경색등)에 맞추어 적절하게 보정되어 의사(擬似) 중간조패턴이나 2진화 패턴으로 변환되는 중간조처리부(5)와 2진 처리부(6)에 각각 인가되는데, 이때 시스템제어부(7)의 지령에 따라 의사중간조처리가 필요한 경우에는 중간조(H.T)신호에 의해 중간조처리부(5)가 동작되며, 단순 2진화 처리를 할 경우에는 스탠다드(STD)신호에 의해 2진 처리부(6)가 동작되어 사용자의 선택에 따라(원고농담)화신호(V.S)를 시스템제어부(7)로 출력하게 된다. 이와같이 동작되는 기존의 화상처리방식에서 수신측 가능부주사밀도가 정하여져 있을 경우, 사진과 같은 중간조의 화상을 전송하게 되면 수신측 부주사 밀도에 맞추어 독취하게 되어 선과 선 사이에 있는 데이타는 놓치게되므로 해상도가 저하되는 문제점이 있었다.The output analog signal is converted into a digital signal through the A / D converter 3 and applied to the image corrector 4 so that the analog signal is properly corrected according to the state of one line (the state of one fluorescent lamp, the original background color, etc.). I) applied to the halftone processing part 5 and the binary processing part 6 which are converted into halftone patterns or binarization patterns, respectively, in which case the halftone treatment is required according to the command of the system controller 7; The half-tone processing unit 5 is operated by the (HT) signal, and in the case of simple binarization processing, the binary processing unit 6 is operated by the standard (STD) signal, so as to be made according to the user's selection (manuscript joke). The signal VS is output to the system controller 7. In the conventional image processing method operating as described above, when the reception side scan density is determined, when transmitting a half-tone image such as a photograph, it is read in accordance with the reception side scanning density and data between the lines is lost. There was a problem that is lowered.

이에 본 발명은 상기한 문제점을 개선시키기 위해 안출된 것으로써 원고의 주주사(主走査) 1라인을 기억하는 라인메모리와 데이타 셀렉터 및 이들을 제어하는 신호발생기를 기존의 회로에 연결구성시켜 원고를 전송선밀도보다 2배의 밀도로 주사한 뒤 부주사방향으로 어느라인과 그 다음라인을 합성시켜 중간조처리를 하도록한 것으로, 이하 그의 기술을 첨부된 도면에 따라 설명하면 다음과 같다. 제 3 도는 본 발명에 따른 팩시밀리 화상처리방식을 위한 회로구성으로써 그의 연결구성을 살펴보면, 화신호처리부(1)의 출력은 라인메모리(8) 입력단과 데이타 셀렉터(9)의 입력단(A)에 각각 인가되며 동시에 2진 처리부(6)에 인가되도록 구성하고, 라인메모리(8)의 출력은 데이타 셀렉터(9)의 타입력단(B)에 인가되며 데이타 셀렉터(9)의 출력은 중간조처리부(5)에 인가되어 시스템제어부(7)의 스탠다드(STD)신호와 중간조(H.T)신호에 의해 제어되는 2진 처리부(6)와 중간조처리부(5)의 출력이 시스템제어부(7)에 화신호(V.S)가 인가되도록 구성하고, 상기 시스템제어부(7)의 중간조(H.T)신호는 제어파형을 발생시키는 J-K플립플롭(10)(11)의 입력단(J)(K)에 각각 인가되며, 그의 라인인에이블신호(L.E)는 J-K플립플롭(11)의 클럭단(CK)에 인가되도록 구성하고, 클럭신호(CLK)는 버퍼(12)를 거쳐 앤드게이트(13)의 한 입력단에 인가되며 동시에 J-K플립플롭(10)의 클럭단(CK)에 인가되고 출력단(θ)의 신호는 앤드게이트(12)의 타입력단에 인가되어 앤드게이트(13)의 출력이 데이타 셀렉터(9)의 단자(S)에 인가되도록 구성하고, J-K플립플롭(11)의 출력(θ)은 라인메모리(8)의 라인인에이블신호로 인가되며 데이타 셀렉터(9)의 스트로브단(ST)에 인가되도록 구성한 것으로, 이하 그의 동작 상태 및 작용효과를 첨부된 도면에 따라 설명하면 다음과 같다.Accordingly, the present invention has been made to improve the above-mentioned problem, and a line memory for storing one line of the main scan of the original, a data selector, and a signal generator for controlling them are connected to an existing circuit to transfer the original. After scanning at twice the density, which line and the next line were synthesized in the sub-scanning direction, the intermediate bath treatment was carried out. Hereinafter, the description will be given with reference to the accompanying drawings. 3 is a circuit configuration for a facsimile image processing method according to the present invention, the output of the signal signal processing section 1 is input to the line memory 8 input terminal and the input terminal A of the data selector 9, respectively. It is configured to be applied to the binary processing section 6 at the same time, the output of the line memory 8 is applied to the type force stage B of the data selector 9, the output of the data selector 9 is the half-tone processing section 5 The output of the binary processing section 6 and the half-tone processing section 5 applied to the system control section 7 and controlled by the standard (STD) signal and the halftone (HT) signal of the system control section 7 is transmitted to the system control section 7. (VS) is applied, the half-tone (HT) signal of the system control unit 7 is applied to the input terminal (J) (K) of the JK flip-flop (10) 11, which generates a control waveform, respectively, The line enable signal LE is configured to be applied to the clock terminal CK of the JK flip-flop 11, and the clock signal CLK is It is applied to one input terminal of the AND gate 13 via the buffer 12 and at the same time to the clock terminal CK of the JK flip-flop 10 and the signal of the output terminal θ is applied to the type force terminal of the AND gate 12. And the output of the AND gate 13 is applied to the terminal S of the data selector 9, and the output θ of the JK flip-flop 11 is applied as a line enable signal of the line memory 8. It is configured to be applied to the strobe end ST of the data selector 9, and its operation state and effect will be described below with reference to the accompanying drawings.

제 3 도에서 중간조처리로 화상전송을 할 경우 부주사를 수신측의 2배로(수신측 3.85l/mm일 경우 7.7l/mm) 독취한다.In FIG. 3, the sub scanning is read twice as much as the receiving side (7.7 l / mm for the receiving side 3.85 l / mm) when performing image transfer with halftone processing.

이때 제 4 a 도와 같은 라인인에이블(L.E)신호가 시스템제어부(7)로부터 출력되어 J-K플립플롭(11)의 클럭단(CK)에 인가되어 그의 출력단(θ)으로 하이(H)신호가 출력되면 라인메모리(8)는 입력가능상태로 되어 클럭신호(CLK)에 의해 1라인분의 화상을 기억하게 된다.At this time, the same line enable signal LE is output from the system controller 7 and applied to the clock terminal CK of the JK flip-flop 11 to output a high signal to its output terminal θ. When the line memory 8 is ready for input, the line memory 8 stores one line of image by the clock signal CLK.

이때 시스템제어부(7)에서는 중간조(H.T)신호가 출력되므로 화신호 척처리부(1)에서 발생된 신호는 2진 처리부(6)에 인가되게 되나 동작을 하지않게 되며 데이타 셀렉터(9)의 스트로브단(ST)으로는 J-K플립플롭(11)의 출력(θ)이 인가되므로 데이타 셀렉터(9)도 동작을 하지않게 된다.At this time, since the halftone (HT) signal is output from the system control unit 7, the signal generated by the speech signal chuck processing unit 1 is applied to the binary processing unit 6, but does not operate, and the strobe of the data selector 9 does not operate. Since the output θ of the JK flip-flop 11 is applied to the stage ST, the data selector 9 also does not operate.

이후, 다시 시스템제어부(7)로부터 라인인에이블(L.E)신호가 발생되며 J-K플립플롭(11)의 출력단(θ)으로는 로우(L)신호가 출력되어 라인메모리(8)와 데이타 셀렉터(9)의 스트로브단(ST)에 인가되므로 라인메모리(8)는 클럭신호(CLK)에 맞추어 출력을 발생시키며, 데이타 셀렉터(9)도 동작가능한 상태로 되게 된다.Thereafter, a line enable signal LE is generated from the system controller 7, and a low signal L is output to the output terminal θ of the JK flip-flop 11 so that the line memory 8 and the data selector 9 are output. Is applied to the strobe stage ST, the line memory 8 generates an output in accordance with the clock signal CLK, and the data selector 9 is also operable.

상기 J-K플립플롭(10)은 중간조(H.T)신호를 받아 토글(Toggle)모드로 동작을 이루는데, 이는 2분조 동작이므로 클럭(CLK)입력을 2분조하게 되어 제 4d 도와 같은 파형을 출력시키게 된다. 여기서 버퍼(12)는 타임동기를 맞추기 위한 것이다.The JK flip-flop 10 operates in a toggle mode by receiving a half-tone (HT) signal, which is a two-division operation so that the clock (CLK) input is divided into two to output a waveform like the 4d diagram. do. Here, the buffer 12 is for synchronizing time synchronization.

상기한 제어신호가 데이타 셀렉터(9)에 인가되면 제 5 도에서 보는 바와같이 Y의 신호가 라인메모리(8)에서 출력되며, X의 신호가 화신호처리부(1)에서 출력되어 데이타 셀렉터(9)의 입력단(B)(A)으로 각각 인가되므로 제 6 도의 기능테이블에 따라 제 5 도의 Z과 같은 신호를 시스템제어부(7)로 인가시키게 된다.When the above control signal is applied to the data selector 9, as shown in FIG. 5, the signal of Y is output from the line memory 8, and the signal of X is output from the signal signal processing section 1 so that the data selector 9 Since it is applied to the input terminal (B) (A) of each of the (6), a signal such as Z of FIG. 5 is applied to the system controller 7 according to the function table of FIG.

따라서, 본 발명에 따른 팩시밀리의 화상처리방식은 이상의 설명에서와 같이, 중간조처리로 화상을 전송시키는 경우 화상의 해상도를 약 2배로 처리하므로 사진과 같은 원고 전송에서 해상도의 향상에 큰 효과를 갖게 된다.Therefore, the image processing method of the facsimile according to the present invention has a great effect on improving the resolution in the transmission of an original such as a photograph since the resolution of the image is approximately doubled when the image is transmitted by halftone processing as described above. do.

Claims (1)

화신호처리부(1)와 2진 처리부(6) 및 중간조처리부(5)와 시스템제어부(7)를 포함하는 팩시밀링의 화상처리방식에 있어서, 시스템제어부(7)의 중간조(H.T)신호는 제어파형을 발생시키는 J-K플립플롭(10)(11)의 입력단(J)(K)과 중간조처리부(5)에 각각 인가되며, 그와 라인인에이블(L.E)신호는 J-K플립플롭(11)의 클럭단(CK)에 인가되도록 구성하고, 클럭신호(CLK)는 버퍼(12)를 거쳐 앤드게이트(13)의 한 입력단에 인가되며 동시에 J-K플립플롭(10)의 클럭단(CK)에 인가되고, J-K플립플롭(10)의 출력단(θ)신호는 앤드게이트(12)의 타입력단에 인가되어 앤드게이트(12)의 출력이 데이타 셀렉터(9)의 단자(S)에 인가되도록 구성하고, 플립플롭(11)의 출력단(θ)신호는 화신호처리부(1)와 연결된 라인메모리(8)에 인가되며 동시에 데이타 셀렉터(9)의 스트로브단(ST)에 인가되도록 구성하여 중간조처리로 화상을 전송시키도록 한 것을 특징으로 하는 팩시밀리의 화상처리방식.In a facsimile image processing method including a signal signal processing unit (1), a binary processing unit (6), an intermediate tone processing unit (5), and a system control unit (7), the halftone (HT) signal of the system control unit (7) Is applied to the input terminal J (K) and the half-tone processing unit 5 of the JK flip-flop 10, 11 for generating the control waveform, respectively, and the line enable signal LE is a JK flip-flop 11 The clock signal CLK is applied to one input terminal of the AND gate 13 via the buffer 12 and at the same time to the clock terminal CK of the JK flip-flop 10. The output terminal θ signal of the JK flip-flop 10 is applied to the type force terminal of the AND gate 12 so that the output of the AND gate 12 is applied to the terminal S of the data selector 9. The output terminal θ signal of the flip-flop 11 is applied to the line memory 8 connected to the signal processing unit 1 and simultaneously applied to the strobe terminal ST of the data selector 9. The image processing system of a facsimile, characterized in that to transfer the images to halftone processing.
KR1019870013660A 1987-11-30 1987-11-30 Picture processing method for fax KR930010146B1 (en)

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